Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition
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Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition

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05.02.2017 Views

Engine management Engine code: System: AGL Bosch Motronic Fascia General information 2 Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults. o Carry out road test for at least 10 minutes. ;1 Ensure accelerator pedal is briefly fully depressed and engine speed exceeds 3500 rpm. 0 If engine does not start: Crank engine for 6 seconds. Leave ignition switched ON. Accessing and erasing The engine control module (ECM) fault memory can only be accessed and erased using diagnostic equipment connected to the data link connector (DLC). -- Trouble code identification I VAG type 1 Fault location / Probable cause 00000 No fault found 81002 Engine coolant temperature (ECT) sensor - short circuit Wiring short circuit, ECT sensor 81003 Engine coolant temperature (ECT) sensor - broken wire Wiring openlshort circuit, poor connection, ECT sensor 81004 Engine coolant temperature (ECT) sensor - range1 I ECT defective. ECM performance problem 81005 Engine coolant temperature (ECT) sensor - loose Wiring, multi-plug, ECT sensor connection 81006 Intake air temperature (IAT) sensor - short circuit Wiring short circuit, IAT sensor 81007 Intake air temperature (IAT) sensor - broken wire Wiring openlshort circuit, poor connection, IAT sensor 81008 1 Intake air temperature (IAT) sensor - loose connection I Wiring, multi-plug, IAT sensor I -

Model: LT 2,3 VOLKSWAGEN Engine management - VAG type Fault location Probable cause Manifold absolute pressure (MAP) sensor - range1 performance problem Manifold absolute pressure (MAP) sensor - no signal Hoses blockedlleaking, ECM Hoses interchangedlnot connected, ECM Closed throttle position (CTP) switch - switch contacts Wiring short circuit, CTP switch always closed Closed throttle position (CTP) switch - loose connection ( Wiring, multi-plug, CTP switch Closed throttle position (CTP) switch - switch contacts always open Throttle position (TP) sensor - high input Throttle position (TP) sensor - low input Throttle position (TP) sensor - loose connection Idle speed control (ISC) actuator position sensor - high input ldle speed control (ISC) actuator position sensor - low input ldle speed control (ISC) actuator position sensor - loose connection Idling control - lower limit reached Idling control - upper limit reached Idling control - limp-home mode Wiring open circuit, throttle valve tighffsticking, ISC actuator, CTP switch Wiring short to positive, TP sensor Wiring shortto earth,^^ sensor Wiring, multi-plug, TP sensor - - - Wiring short to positive, ISC actuator position sensor I Wiring short to earth, ISC actuator position sensor Wiring, multi-plug, ISC actuator position sensor Intake leak I ISC actuatorlposition sensor I ISC actuatorlposition sensor, intake leak Heated oxygen sensor (H02S) - high voltage 1 Wiring short to positive, H02S Heated oxygen sensor (H02S) - broken wire Heated oxygen sensor (H02S) - rangelperformance problem Heated oxygen sensor (H02S) - heater short to earth I Wiring open circuit, H02S I I Wiring short to earth, H02S Heated oxygen sensor (H02S) - heater short to positive I Wiring short to positive, H02S Heated oxygen sensor (H02S) - broken wire I Wiring open circuit, H02S Lambda regulation - control limit exceeded Heated oxygen sensor (H02S) - lambda control limit not reached Injectors 1 & 4 - short to positive Injectors 1 & 4 - open circuitkhort to earth lniectors 2 & 3 - short to positive Fuel pressurelpump, ignition system, intake1 exhaust leak, injector(s), H02S, EVAP canister purge valve Fuel pressure, ignition system, intakelexhaust leak, injector(s), HOZSlheating, EVAP canister purge valve I Wiring short to positive, injector Injectors 2 & 3 - open circuitlshort to earth ( Wiring open circuiffshort to earth, injector Mixture control (MC), idling - too rich Mixture control (MC), idling - too lean Mixture control (MC), partial load - too rich Mixture control (MC), partial load - too lean Wiring open circuiffshort to earth, injector Wiring short to positive, injector Fuel pressure, ignition system, injector(s), H02SI heating, exhaust leak, EVAP canister purge valve Fuel pressure, ignition system, intake leak, injector(s), HOZSlheating, exhaust leak Fuel pressure, ignition system, injector(s), H02SI heating, exhaust leak, EVAP canister purge valve Fuel pressure, ignition system, intake leak, injector(s), HOZSlheating, exhaust leak Ignition coillamplifier, cylinders 1 & 4 - short to positive I Wiring, ignition coillamplifier

Model: LT 2,3 VOLKSWAGEN<br />

Engine management<br />

-<br />

VAG type <strong>Fault</strong> location Probable cause<br />

Manifold absolute pressure (MAP) sensor - range1<br />

performance problem<br />

Manifold absolute pressure (MAP) sensor - no signal<br />

Hoses blockedlleaking, ECM<br />

Hoses interchangedlnot connected, ECM<br />

Closed throttle position (CTP) switch - switch contacts Wiring short circuit, CTP switch<br />

always closed<br />

Closed throttle position (CTP) switch - loose connection ( Wiring, multi-plug, CTP switch<br />

Closed throttle position (CTP) switch - switch contacts<br />

always open<br />

Throttle position (TP) sensor - high input<br />

Throttle position (TP) sensor - low input<br />

Throttle position (TP) sensor - loose connection<br />

Idle speed control (ISC) actuator position sensor -<br />

high input<br />

ldle speed control (ISC) actuator position sensor -<br />

low input<br />

ldle speed control (ISC) actuator position sensor - loose<br />

connection<br />

Idling control - lower limit reached<br />

Idling control - upper limit reached<br />

Idling control - limp-home mode<br />

Wiring open circuit, throttle valve tighffsticking,<br />

ISC actuator, CTP switch<br />

Wiring short to positive, TP sensor<br />

Wiring shortto earth,^^ sensor<br />

Wiring, multi-plug, TP sensor<br />

- - -<br />

Wiring short to positive, ISC actuator position<br />

sensor<br />

I Wiring short to earth, ISC actuator position sensor<br />

Wiring, multi-plug, ISC actuator position sensor<br />

Intake leak<br />

I ISC actuatorlposition sensor<br />

I ISC actuatorlposition sensor, intake leak<br />

Heated oxygen sensor (H02S) - high voltage 1 Wiring short to positive, H02S<br />

Heated oxygen sensor (H02S) - broken wire<br />

Heated oxygen sensor (H02S) - rangelperformance<br />

problem<br />

Heated oxygen sensor (H02S) - heater short to earth<br />

I Wiring open circuit, H02S<br />

I<br />

I Wiring short to earth, H02S<br />

Heated oxygen sensor (H02S) - heater short to positive I Wiring short to positive, H02S<br />

Heated oxygen sensor (H02S) - broken wire<br />

I Wiring open circuit, H02S<br />

Lambda regulation - control limit exceeded<br />

Heated oxygen sensor (H02S) - lambda control limit not<br />

reached<br />

Injectors 1 & 4 - short to positive<br />

Injectors 1 & 4 - open circuitkhort to earth<br />

lniectors 2 & 3 - short to positive<br />

Fuel pressurelpump, ignition system, intake1<br />

exhaust leak, injector(s), H02S, EVAP canister<br />

purge valve<br />

Fuel pressure, ignition system, intakelexhaust leak,<br />

injector(s), HOZSlheating, EVAP canister purge<br />

valve<br />

I Wiring short to positive, injector<br />

Injectors 2 & 3 - open circuitlshort to earth ( Wiring open circuiffshort to earth, injector<br />

Mixture control (MC), idling - too rich<br />

Mixture control (MC), idling - too lean<br />

Mixture control (MC), partial load - too rich<br />

Mixture control (MC), partial load - too lean<br />

Wiring open circuiffshort to earth, injector<br />

Wiring short to positive, injector<br />

Fuel pressure, ignition system, injector(s), H02SI<br />

heating, exhaust leak, EVAP canister purge valve<br />

Fuel pressure, ignition system, intake leak,<br />

injector(s), HOZSlheating, exhaust leak<br />

Fuel pressure, ignition system, injector(s), H02SI<br />

heating, exhaust leak, EVAP canister purge valve<br />

Fuel pressure, ignition system, intake leak,<br />

injector(s), HOZSlheating, exhaust leak<br />

Ignition coillamplifier, cylinders 1 & 4 - short to positive I Wiring, ignition coillamplifier

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