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

Model. Polo 1 ,OSll,3 (08193 +) Polo ClassiclEstate l,6/l,8
VOLKSWAGEN
GolfNento 1,4 (07192 +) GolfNento 1,6
GolfNentolCabrio 1,8 (07193 +) Passat 1,8 (AAM, ADZ 07/94 -.)
Passat 1,8 (ABS 101934) CaddylPickup 1,6
'kF?
/
Engine rnanagc--1
Ensure accelerator pedal is briefly fully depressed and
engine speed exceeds 3000 rpm.
If engine does not start: Crank engine for 6 seconds. Leave
ignition switched ON.
0 Data link connector (DLC) - 2-pin: (A) black, (B)
brownlwhite.
Accessing
The engine control module (ECM) fault memory can only be
accessed and erased using diagnostic equipment
connected to the data link connector (DLC).
NOTE: Brown or white data link connector (DLC) terminal 1 is not
connected to ECM terminal 11.
Passat 1994+ - adjacent to steering column
General information
-
0 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.
Carry out road test for at least 10 minutes.
Erasing
Ensure ignition switched OFF.
Disconnect ECM multi-plug or battery earth lead.
NOTE: ECM adaptive memory may be erased causing erratic
running faults. Carry out road test to allow ECM to
re-learn basic values.
Diagnostic equipment can also be used to erase data from
ECM fault memory.
WARNING: Disconnecting the battery may erase memory from
electronic units (e.g. radio, clock).
Trouble code identification
VAG type Fault location Probable cause
No fault found I -
Vehicle speed sensor (VSS)
Idle speed control (ISC) actuator
Crankshaft position (CKP) sensorlengine speed
(RPM) sensor
Closed throttle position (CTP) switch
Throttle position (TP) sensor
Engine coolant temperature (ECT) sensor
Intake air temperature (IAT) sensor
Knock sensor (KS)
Heated oxygen sensor (H02S)
Engine control module (ECM) - supply voltage
Heated oxygen sensor (H02S) - lambda control
Mixture control (MC)
Wiring, speedometer, VSS
Wiring, multi-plug incorrectly wired, ISC actuator
I Insecure rotor, wiring, CKPIRPM sensor
Accelerator cable adjustment, wiring, CTP switch
Wiring, poor connection, TP sensor
Wiring, poor connection, ECT sensor
Wiring, IAT sensor
I Wiring, KS
Wiring, H02S, heating inoperative, fuel level low
Battery, wiring
Heating inoperative, exhaust leak, misfire, fuel press~?rel
pump, EVAP canister purge valve
Fuel level low, fuel pressurelpump, intakelexhaust leak,
misfire, H02S, EVAP canister purge valve, injector,
excessive fuel in engine oil
ldle speed control (ISC) actuator position sensor ( Wiring, throttle valve, ISC actuator position sensor
Engine control module (ECM) immobilizer active
Engine control module (ECM)
lncorrectldamaged key, incorrectly coded,
ECMlimmobilizer replacement without coding, wiring,
immobilizer defective
I ECM
Trouble code may be displayed if engine is not idling during self-diagnosis due to missing CKPIRPM sensor signal. Ignore trouble code
if engine starts.
rn After repairs, erase learnt lambda control values as follows:
Polo -+1994, GolfNento -07193 & Passat: Wait 30 seconds. Disconnect battery or ECM multi-plug for at least 30 seconds.
Except Polo -1994. GolfNento -07193 & Passat: Erase using diagnostic equipment.
Carry out road test to allow ECM to re-learn basic values.