measuring blocks for boost and afm on passat?

[@udi A3]

I know its not Audi but a guy round the corner from me is having limp mode issues possibly boost related. Ive logged 3 10 and 11, I think I can see requested boost graphs but lazy actual boost, however the labelling isnt great. Car is a y reg 1.9dt 100bhp passat

Also the afm values, I think im seeing expected value topping out at 850mg but the other reading never really makes it there.



Again im not 100% im reading blocks correctly. Yesterday the car felt flat all the time no turbo, n75 actuates in output tests. Today he Mr muscled and was a clear different but still limp mode.

There were a couple of fault codes
00741 brake pedal monitoring implausible signal
00575 intake manifold pressure 17-10 control difference intermittent

Any ideas?
thanks tom

 

[christof71]

write engine code:-}

 

[@udi A3]

Sorry just pulled the log off my other machine.



Chassis Type: 3B - VW Passat B5
Scan: 01 02 03 08 15 16 17 19 35 36 37 46 47 55 56 57 58 75 76 77


Mileage: 362470km/225228miles
-------------------------------------------------------------------------------
Address 01: Engine Labels: Redir Fail!
Part No: 028 906 021 GL
Component: 1,9l R4 EDC 00SG 1446
Coding: 00002
Shop #: WSC 05314
VCID: 5FCD1DB7DD29DDE0786

3 Faults Found:
00741 - Brake Pedal Monitoring
27-00 - Implausible Signal
00575 - Intake Manifold Pressure
17-10 - Control Difference - Intermittent
17978 - Engine Start Blocked by Immobilizer
P1570 - 35-00 -
Readiness: N/A

 

[christof71]

I mean engine code {for example, ANZ}

Self diagnosis Fault table Notes: [SIZE=-1]◆ [/SIZE]The fault table is listed according to the 5 digit fault code on the left. [SIZE=-1]◆ [/SIZE]Before renewing components indicated as being faulty, check the wiring and connectors to these components as well as the earth connections using current flow diagram. This is particularly relevant if faults are output as "occurring sporadically" (SP). V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00513 Engine speed sender -G28 implausible signal - G28 defective - Distance speed sender/sender wheel too large - Metal swarf on G28 or mounting pedestal loose - Fault lamp lights up - Increased idling speed - Poor starting - Engine runs rough - Reduced output - No indication on rev-counter - Check G28 =>Page 23-36 no signal - G28 defective - Wiring open or short circuit V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00519 Intake manifold pressure sender -G71 implausible signal - Charge pressure control solenoid valve (N75) defective - Control unit defective - Hose connections interchanged, not connected - Reduced output - Increased emission figures - Check N75 =>Page 23-37 Short to positive Short to earth V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00522 Coolant temperature sender -G62 Short to earth - G62 defective - Wiring short to earth - Black exhaust when starting - Engine pre-heating not operating - Glow period always approx. 20 sec. - Check G62 =>Page 23-43 Open circuit/ short to positive - G62 defective - Wiring open circuit or short to positive Output on V.A.G 1551 printer Possible causes of fault Possible effects Fault remedy 00527 Intake manifold temperature sender -G72 Short to earth - G72 defective - Wire has short to earth - Engine pre-heating not operating - Check G72 =>Page 23-51 Open circuit/short to positive - G72 defective - Open circuit or short to positive 00528 Altitude sender -F96 Open circuit/short to earth - F96 defective - Wiring open circuit or short to earth - Black exhaust at altitude - Check F96 => Page 23-40 V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00532 Current supply implausible signal - Current supply relay terminal 30 (J317) defective - Various running problems including engine will not start - Check current supply for Diesel direct injection system control unit =>Page 23-51 00539 Fuel temperature sender -G81 Short to earth - G81 defective - Wiring short to earth - Increased emission figures - Check G81 => Page 23-56 Open circuit/short to positive - G81 defective - Wiring open circuit or short to positive V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00542 Needle lift sender -G80 Input open - G80 defective - Wiring open or short circuit - Fault lamp lights up - Engine runs rough - Reduced output - Increased emission figures - Check G80 => Page 23-63 Open circuit/short to positive - G81 defective - Wiring open circuit or short to positive Short to earth implausible signal - G80 defective - Injection system wiring to 3rd cylinder not OK. - Fuel shortage - Air in fuel system V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00550 Commencement of injection control Control difference - Commencement of injection valve (N108) defective - Needle lift sender (G80) defective - Fuel tank empty - Fuel supply not OK., fuel shortage - Air in fuel system - Start of delivery not OK - Engine runs rough - Reduced output - Poor cold start characteristics - Increased emission figures - Check N108 =>Page 23-24 V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00553 Air mass meter -G70 implausible signal - G70 defective - Reduced output - Black exhaust - Check exhaust gas recirculation and air mass meter function =>Page 23-83 Open circuit/short to earth - G70 defective - Wiring open circuit or short to earth Short to positive - G70 defective - Wiring open circuit or short to positive V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00575 Intake manifold pressure Control difference - Solenoid valve for charge pressure control (N75) defective - Hose connections interchanged, not connected - Reduced output - Check N75 =>Page 23-67 00625 Speed signal implausible signal - With electrical speedometer: no signal from speedometer (G21) / speedometer sender (G22) - With mechanical speedometer: no signal from speed sender (G54) - Indicated speed incorrect - Check signal from G21, G22 or G54 =>Page 23-86 V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00626 Glow period warning lamp -K29 Open circuit/short to earth - Wiring open circuit - Bulb defective - Glow period warning lamp not functioning - Check glow period warning lamp -K29 => Current flow diagrams, Electrical fault finding and Fitting locations binder - Short to earth - Glow period warning lamp permanently on Short to positive - Short to positive - Glow period warning lamp not functioning Ouput on V.A.G 1551 printer Possible causes of fault Possible effects Fault remedy 00668 Vehicle current terminal 30 Signal too small - Current supply relay terminal 30 (J317) defective - Engine will not start - Various running problems including engine will not start - Check Diesel direct injection system control unit current supply =>Page 23-51 implausible signal 00671 CCS Switch -E45 undefined switch position - E45 defective - Wiring open/short circuit - Cruise control system switched off - Check cruise control system => Current flow diagrams, Electrical fault finding and Fitting locations binder V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00741 Brake pedal monitoring implausible signal - Brake light switch (F) defective - Brake pedal switch (F47) defective - Both switch positions not synchronised - Fault lamp lights up - Brake light defective - Check F and F47 =>Page 23-47 00765 Modulating piston movement sender -G149 - Injection pump defective - Wiring open/short circuit - Fault lamp lights up - Various running problems - Engine stops - Check G149 => Page 23-59 V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 00777 Accelerator position sender -G79 implausible signal - G79 defective - G79 incorrectly set - Fault lamp lights up - Increased idling speed - Check G79 => Page 23-18 Short to positive - G79 defective - Wiring short to positive V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01028 Fan relay -J323 Open circuit/short to earth - Wiring open circuit - Relay defective - Fan run-on not functioning - Check J323 =>Page 01-35, final control diagnosis - Short to earth - Fan runs permanently Short to positive - Short to positive - Fan run-on not functioning 01044 Control unit incorrectly coded - Invalid control unit coding - Code control unit =>Page 23-92 V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01117 Load signal for alternator terminal DF implausible signal - Alternator defective - Voltage regulator defective - Engine pre-heating not operating - Check alternator => Current flow diagram, Electrical fault finding and Fitting locations binder 01180 Engine/air conditioner cut-off electrical connection Short to positive - Short in the wiring - Vehicle acceleration reduced, when air conditioner is switched on - Check air conditioner compressor cut-in =>Page 01-35, final control diagnosis V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01193 Low heat output relay -J359 Open circuit/short to earth - Wiring open circuit - Low heat output relay -J359 or high output relay -J360 defective - Engine preheating not functioning - Check J359 or J360 =>Page 01-35, final control diagnosis - Short to earth - Engine preheating permanently on Short to positive - Short to positive - Engine preheating not functioning V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01237 Fuel cut-off valve -N109 mechanical fault - N109 defective, leaking or sticking - Reduced output - Engine stops - Check N109 =>Page 01-35, Final control diagnosis Open/short circuit to earth - N109 defective - Wiring open circuit/short to earth V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01242 Control unit output stages Open/short to positive - All components activated by final control diagnosis - Various running problems - Engine stops - Carry out final control diagnosis =>Page 01-35 Check wiring connections to control elements Control unit defective if control elements OK. V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01262 Charge pressure control solenoid valve -N75 Open circuit/short to earth - Wiring open circuit - Solenoid valve defective - Reduced output - Charge pressure too low - Check N75 =>Page 01-35, final control diagnosis - Short to earth - Reduced output - Charge pressure too high Short to positive - Short to positive - Reduced output - Charge pressure too low V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01265 Exhaust gas recirculation valve -N18 Open circuit/short to earth - Wiring open circuit - Exhaust gas recirculation valve defective - No exhaust gas recirculation - Check N18 =>Page 01-35, final control diagnosis - Short to earth - Too much exhaust gas recirculation - Reduced output, black smoke Short to positive - Short to positive - No exhaust gas recirculation V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01266 Glow plug relay -J52 Open circuit/short to earth - Wiring open circuit - Glow plug relay defective - Glow plug system not working - Check J52 =>Page 01-35, final control diagnosis - Short to earth - Glow plug system permanently on Short to positive - Short to positive - Glow plug system not working V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01268 Quantity adjuster -N146 Control difference - Injection pump defective - Wiring open/short circuit - Fault lamp lights up - Various running problems - Engine stops - Check N146 =>Page 23-61 Lower limit value - Quantity adjuster incorrectly set - Black smoke - Rough idling Upper limit value - Quantity adjuster incorrectly set - Jerking, poor performance V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 01269 Commencement of injection valve -N108 Open circuit/short to earth - Wiring open circuit - Commencement of injection valve defective - Engine knocks at idling, because commencement of injection is constantly "advanced" - Check N108 =>Page 01-35, final control diagnosis - Short to earth - Poor performance, because commencement of injection is constantly "retarded" Short to positive - Short to positive - Engine knocks at idling, because commencement of injection is constantly "advanced" V.A.G 1551 print-out Possible causes of fault Possible effects Fault remedy 17978 Engine control unit blocked - Immobilizer control unit defective/missing - Engine will not start - Match engine electronic control unit to the electronic immobilizer => Page 23-98 - Short in the communication wire - Check electronic immobilizer: => Repair group 96; Servicing electronic immobilizer - Incorrect coding - Attempted manipulation 65535 Control unit -J248 defective - Control unit internally defective - Various running problems - Engine stops - Replace J248

 

[christof71]

Self diagnosis Evaluating measured value blocks, engine code AFN Display group 07 with ignition switched on (engine cold and not running)

→ Indicated on display	Read measured value block 7 ⇒ 15.4 5C 15.9 5C 16.7 5C
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Fuel temperature Approx. ambient temperature1) OK --- -5.6 °C Short circuit or fuel temperature sender -G81 defective - Check G81 => Page 23-56 In case of fault the measured value block indicates a fuel temperature of -5.6 °C 2 = No display --- --- --- Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = Intake air temperature Approx. ambient temperature1) OK --- Approx. 136.8 °C Intake manifold temperature sender -G72 defective - Check G72 => Page 23-51 In case of fault the measured value block indicates a constant intake manifold temperature of ca.136.8 °C 4 = Coolant temperature Approx. ambient temperature1) OK --- Large deviation from ambient temperature Short circuit or coolant temperature sender -G62 defective - Check G62 => Page 23-43 In case of fault the fuel temperature is shown alternately 1) Details of temperature specifications are not possible. When the engine is cold the fuel, intake air and coolant temperatures must equate approximately to ambient temperature. If a temperature deviates noticeably then the relevant sender must be checked. Display group 00 at idling speed (engine warm, coolant temperature not below 80 °C)

→ Indicated on display:	Read measured value block 0 ⇒ 43 56 0 24 90 204 59 155 154 116
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 41...45 OK --- 2 = Commencement of injection 0...88 OK --- Above 88 - Continue with check in display group 04, => Page 01-87 3 = Accelerator pedal position OK --- Above 0 - Continue with check in display group 02, display zone 2 => Page 01-83 Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 4 = Quantity injected 11...45 OK --- Below 11 or above 45 - Continue with check in display group 01, => Page 01-81 5 = Intake manifold pressure No specification1) --- --- 6 = Atmospheric pressure No specification1) --- --- 7 = Coolant temperature 35...80 OK --- Above 80 Engine too cold - Run engine at increased speed to warm up and repeat check. Continue with check in display group 07, display zone 4 => Page 01-76 Display zone Display on V.A.G 1551/1552 Possible cause(s) if fault Fault elimination 8 = Intake manifold temperature 50...182 OK --- Below 50 or above 182 - Continue with check in display group 07, display zone 3 => Page 01-76 9 = Fuel temperature 91...201 OK --- Below 91 or above 201 - Continue with check in display group 07, display zone 1 => Page 01-76 10 = Mass of air drawn in2) 69...135 OK --- Below 69 or above 135 - Continue with check in display group 03 => Page 01-84 1) Displays in display zones 5 and 6 must approximately be the same. 2) The measured values require the exhaust gas recirculation (EGR) to be switched on. The EGR is switched off after approx. 10 or 2 minutes at idling speed, therefore give burst on throttle or restart engine. Display group 01 at idling speed (engine warm, coolant temperature not below 80 °C)

→ Indicated on display	Read measured value block 1 " 840 rpm 6.5 mg/H 1.480 V 87.3 5C
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 861...945 rpm OK --- 2 = Quantity injected 2.2...9 mg/H OK --- Below 2.2 mg/H Injection pump too rich - Renew injection pump => Page 23-19 Above 9 mg/H Engine too cold - Run engine at increased speed to warm up and repeat check. Injection pump too lean - Renew injection pump => Page 23-19 Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = Voltage from slide valve sender 1.45...1.90 V OK --- Below 1.45 V Injection pump too rich - Renew injection pump => Page 23-19 Above 1.90 V Engine too cold - Run engine at increased speed to warm up and repeat check. Injection pump too lean - Renew injection pump => Page 23-19 4 = Coolant temperature 80...110 °C OK --- Below 80 °C Engine too cold - Run engine at increased speed to warm up and repeat check. Display group 02 at idling speed (engine warm, coolant temperature not below 80 °C)

→ Indicated on Display	Read measured value block 2 ⇒ 840 rpm 0.0 % 0 1 0 88.4 5C
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 861...945 rpm OK --- 2 = Accelerator position 0 % Accelerator pedal not operated: OK --- 1...100 % Accelerator pedal position sender -G79 incorrectly adjusted or defective - Check G-79 and adjust if necessary => Page 23-87 Wiring open circuit to G79 - Check wiring connections to G79 => Page 23-89 3 = Operating condition 010 OK --- 111 Air conditioning switched on - Air conditioning switched off 4 = Coolant temperature 85...110 °C OK --- Display group 03 at idling speed (engine warm, coolant temperature not below 80 °C)

→ Indicated on display:	Read measured value block 3 " 840 rpm 290 mg/H 308 mg/H 54 %
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 861...945/min OK --- 2 = Mass of air drawn in (specified) 230...450 mg/H OK --- Above 450 mg/H Engine too cold - Run engine at increased speed, to warm up and repeat check. Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = 230...450 mg/H OK --- Mass of air drawn in (actual)1) Below 230 mg/H Excessive exhaust gas recirculation - Check exhaust gas recirculation and air mass meter function => Page 23-79 Unmetered air - Check intake air system for leaks. Above 450 mg/H Engine too cold - Run engine at increased speed, to warm up and repeat check. Insufficient exhaust gas recirculation - Engine running at idling speed for 10 min., give burst on throttle. Air mass meter -G70 defective - Check exhaust gas recirculation and air mass meter => Page 23-79 In case of fault the measured value block shows a constant air mass value of approx. 555 mg/H over the complete speed and throttle range. Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 4 = Duty cycle from exhaust gas recirculation valve 10...90 % OK --- 1) The measured values require the exhaust gas recirculation (EGR) to be switched on. The EGR is switched off after approx.10 or 2 minutes at idling speed, therefore give burst on throttle or restart engine. Display group 04 at idling speed (engine warm, coolant temperature not below 80 °C)

→ Indicated on Display	Read measured value block 4 ⇒ 900 rpm 0.95 BTDC 1.25 BTDC 4 %
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 861...945 rpm OK --- 2 = Commencement of injection (specified) 2° ATDC... 4° BTDC OK --- Above 4° BTDC Engine too cold - Run engine at increased speed to warm up and repeat check. Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = Commencement of injection (actual) 2° ATDC... 4° BTDC OK --- Above 4° BTDC Engine too cold - Run engine at increased speed to warm up and repeat check. Injection pump positioned "early" - Check and adjust commencement of injection dynamically => Page 23-24 Commencement of injection valve -N108 defective - Check -N 108 => Page 01-35, final control diagnosis Retarded 2° ATDC Injection pump positioned extremely "retarded" - Check and adjust commencement of injection dynamically => Page 23-24 Injection adjustment blocked - Check -N108 => Page 01-35, final control diagnosis Commencement of injection valve -N108 defective 4 = Duty cycle from commencement of injection valve 2...95 % OK --- Display group 13 at idling speed (engine warm, coolant temperature not below 80 °C)

→ Indicated on display:	Read measured value block 13 ⇒ 0.82mg/H -0.12mg/H 0.49mg/H
The injection system is equipped with an idling speed smooth running control. There may be power differences between the individual cylinders (component tolerances, jet drillings, compressions etc.) which are recognised and equalized via selective injected quantities. Recognition at idling speed is via the signal from the engine speed sender which delivers four signals per crankshaft revolution to the control unit. If the signals are delivered at the same rhythm then all cylinders work the same. If one cylinder is weaker then the crankshaft takes longer for the next half revolution. Conversely a more powerful cylinder accelerates the crankshaft so less time is taken. If the control unit recognises a difference, then the relevant cylinder is given more or less fuel, until the engine runs evenly again. The measured value block displays the injected quantity differences of the individual cylinders compared with No. 3 cylinder that is required to ensure an even engine idling speed. +... mg/H: The relevant cylinder is less powerful than No. 3 cylinder and is therefore supplied with more fuel. -... mg/H: The relevant cylinder is more powerful than No. 3 cylinder and is therefore supplied with less fuel. Display group 00 at full throttle (test drive in 3rd gear, coolant temperature not below 80 °C) Notes: [SIZE=-1]◆ [/SIZE]When testing, accelerate vehicle at full throttle. [SIZE=-1]◆ [/SIZE]The measured values must be printed out or read (2nd person required) when the revolutions reach 3,000 rpm.

→ Indicated on display	Read measured value block 0 ⇒ 148 157 255 123 91 205 68 151 157 154
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 136...150 OK --- Above 190 Revolutions too high, engine governed -- 2 = Commencement of injection 138...188 OK --- Below 138 - Continue with check in display group 04, => Page 01-93 Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = Accelerator pedal position 255 OK --- Below 255 Not at full throttle - Repeat check at full throttle. 4 = Quantity injected 192...215 OK --- Below 192 - Continue with check in display group 08, => Page 01-95 5 = Intake manifold pressure 180...245 OK Below 180 or above 245 - Continue with check in display group 11, => Page 01-99 6 = Atmospheric pressure No specification --- --- Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 7 = Coolant temperature 35...80 OK --- Above 80 Engine too cold - Continue with check in display group 07, display zone 4 =>Page 01-76 8 = Intake air temperature 50...182 OK --- Below 50 or above 182 - Continue with check in display group 07, display zone 3 =>Page 01-76 9 = Fuel temperature 91...201 OK --- Below 91 or above 201 - Continue with check in display group 07, display zone 1 => Page 01-76 10 = Mass of air drawn in 225...255 OK --- Below 225 - Continue with check in display group 10, display zone 1 => Page 01-97 Display group 04 at full throttle (test drive in 3rd gear, coolant temperature not below 80 °C) Notes: [SIZE=-1]◆ [/SIZE]When testing, accelerate vehicle at full throttle. [SIZE=-1]◆ [/SIZE]The measured values must be printed out or read (2nd person required) when the revolutions reach 3,000 rpm.

→ Indicated on display:	Read measured value block 4 " 3100 rpm 105 BTDC 105 BTDC 80 %
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 2850...3150/min OK --- 2 = Commencement of injection (specified) 8...12 ° BTDC OK --- Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = Commencement of injection (actual) Approx. commencement of injection (specified) OK --- For large differences between specified and actual (approx. 5 ° crank angle) Commencement of injection valve -N108 defective Injection pump positioned incorrectly Air in fuel system - Check -N108 => Page 23-24 Check fuel supply system 4 = Duty cycle from commencement of injection valve 60...98 % OK --- Below 60 or above 98 % Commencement of injection valve -N108 defective - Check -N108 => Page 23-24 Check fuel supply system Display group 08 at full throttle (test drive in 3rd gear, coolant temperature not below 80 °C) Notes: [SIZE=-1]◆ [/SIZE]When testing, accelerate vehicle at full throttle. [SIZE=-1]◆ [/SIZE]The measured values must be printed out or read (2nd person required) when the revolutions reach 3,000 rpm.

→ Indicated on display	Read measured value block 8 ⇒ 3290 rpm 38.4 mg/H 35.2 mg/H 35.7 mg/H
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 2850...3150 rpm OK --- 2 = Quantity injected (driver's requirement) 43...45 mg/H OK --- Below 43 mg/H Not full throttle - Repeat check at full throttle. Accelerator pedal position sender -G79 incorrectly adjusted or defective - Check G-79 and if necessary adjust => Page 23-87 Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = Quantity injected (torque map) 40...42 mg/H OK --- Below 40 mg/H Speed too high or too low --- 4 = Quantity injected (opacity map) 38.5...44 mg/H OK --- Below 38.5 mg/H Mass of air drawn in too low - Check exhaust gas recirculation and air mass meter function => Page 23-79 Quantity of exhaust gas recirculated - Check exhaust gas recirculation and air mass meter => Page 23-79 Display group10 at full throttle (test drive in 3rd gear, coolant temperature not below 80 °C) Notes: [SIZE=-1]◆ [/SIZE]When testing, accelerate the vehicle at full throttle. [SIZE=-1]◆ [/SIZE]The measured values must be printed out or read (2nd person required) when the revolutions reach 3,000 rpm.

→ Indicated on display:	Read measured value block 10 " 830 mg/H 1030 mbar 1850 mbar 100 %
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Mass of air drawn in (actual) 850...1050 mg/H OK --- Below 850 mg/H Speed too low or too high - Read off specification at 3000 rpm. Charge pressure too low - Check charge pressure control => Page 23-67 Air mass meter defective - Check exhaust gas recirculation and air mass meter function => Page 23-79 In case of fault the measured value block shows a constant air mass value of about 550 mg/H over complete speed and throttle range Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 2 = Atmospheric pressure (air pressure) No specification --- --- 3 = 1700...2500 mbar OK --- Intake manifold pressure (charge pressure) Below 1700 mbar Charge pressure control defective - Check charge pressure control => Page 23-67 Turbocharger defective Above 2500 mbar 4 = 100 % OK --- Accelerator pedal position Below 100 % Not full throttle - Repeat check at full throttle. Accelerator pedal position sender -G79 incorrectly adjusted or defective - Check G-79 and if necessary adjust => Page 23-87 Display group 11 at full throttle (test drive in 3rd gear, coolant temperature not below 80 °C) Notes: [SIZE=-1]◆ [/SIZE]When testing, accelerate the vehicle at full throttle. [SIZE=-1]◆ [/SIZE]The measured values must be printed out or read (2nd person required) when the revolutions reach 3,000 rpm.

→ Indicated on display:	Read measured value block 11 " 3340 rpm 1830 mbar 1850 mbar 68 %
Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 1 = Engine speed 2850...3150 rpm OK --- 2 = Charge pressure (specified) 1900...2000 mbar OK --- Display zone Display on V.A.G 1551/1552 Possible cause(s) of fault Fault remedy 3 = Charge pressure (actual) 1700...2500 mbar OK --- Below 1700 mbar Charge pressure control defective - Check charge pressure control => Page 23-67 Turbocharger defective Charge pressure hose not connected to control unit - Connect charge pressure hose Above 2500 mbar Turbocharger defective - Check charge pressure control => Page 23-67 4 = Duty cycle from charge pressure control valve 45...94 % OK ---

 

[christof71]

00575 - Intake Manifold Pressure
17-10 - Control Difference - Intermittent

Check charge pressure control:
When the charge pressure is measured during a test drive, a second person is required, for reasons of safety, to operate the fault reader!!!

• select engine electronics control unit (address word 01); selection is carried out with engine idling
• [SIZE=-1] [/SIZE]Input 08 for "Read measured value block" function
• [SIZE=-1] [/SIZE]Press keys 0, 1 and 1 for Display Group 11

• Read measured value block 11 "

  840 rpm 938 mbar 978 mbar 92 % Accelerate vehicle in 3rd gear from about 1500 rpm using full throttle{test drive ,you need driver!!!} Read measured value block 11 " 3090 rpm 1866 mbar 1917 mbar 62 %

 

[@udi A3]

00575 - Intake Manifold Pressure
17-10 - Control Difference - Intermittent

Check charge pressure control:
When the charge pressure is measured during a test drive, a second person is required, for reasons of safety, to operate the fault reader!!!

• select engine electronics control unit (address word 01); selection is carried out with engine idling
• Input 08 for "Read measured value block" function
• Press keys 0, 1 and 1 for Display Group 11

• Read measured value block 11 "

  840 rpm 938 mbar 978 mbar 92 % Accelerate vehicle in 3rd gear from about 1500 rpm using full throttle{test drive ,you need driver!!!} Read measured value block 11 " 3090 rpm 1866 mbar 1917 mbar 62 %

This is what i did, the mbar figures though, which is actual boost and which is requested? In my graphs the first figure appears to be the requested, and the figures are always a lot higher, peeking out to a flat line, and the second set when plotted would suggest a very lazy turbo. Maybe the N75, but it was activating ok with output tests. Maybe the pipework.

Im not sure on the engine code sorry. its the older style 1.9 tdi though doesnt look like a PD engine.

 

[christof71]

value block 11 "

3340 rpm 1830 mbar 1850 mbar 68 %

Display zone	Display on V.A.G 1551/1552	Possible cause(s) of fault	Fault remedy
1 = Engine speed	2850...3150 rpm	OK	---
2 = Charge pressure (specified)	1900...2000 mbar	OK	---

Display zone	Display on V.A.G 1551/1552	Possible cause(s) of fault	Fault remedy
3 = Charge pressure (actual)	1700...2500 mbar	OK	---
	Below 1700 mbar	Charge pressure control defective	- Check charge pressure control => Page 23-67
		Turbocharger defective
		Charge pressure hose not connected to control unit	- Connect charge pressure hose
	Above 2500 mbar	Turbocharger defective	- Check charge pressure control => Page 23-67
4 = Duty cycle from charge pressure control valve All you have here are: -} 3 = Charge pressure (actual) take a test drive as mentioned above, and save the logs value block 11	45...94 %	OK	---

your engine code is AFN

 

[@udi A3]

Check charge pressure control
=> Page 23-67

I dont suppose you have details of these pages? I just assumed the N75 was working with output tests I hear it clicking.

Thanks tom

 

[christof71]

check the boost pressure when driving in the channel 11, on the 3rd gear at engine speeds around 3200 rpm.{ Attache}
Also chanel 10 {air mass meter }
Replace the stop light sensor, it can also cause a loss of power.

boost pressure and air flow meter is measured during the driving gear 3, as defined above.
Measurements at idle do not make sense, because the motor is not loaded.

is the n75 valve clicks that does not mean that it is good. N75 breaks down in such a way that closes after some time while driving, mostly as the coil heats up.
It is not possible to verify it 100 percent , but for sure you can swap from the car in which there is no problem with loss of power