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

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I<br />

Model: GolfNento 1,4 (-07192) GolfNento 1,8 (-07193)<br />

Passat 1,8 (AAM -07194) Passat 1,8 (ABS -10193)<br />

VOLKSWAGEN<br />

Engine management I<br />

Erasing<br />

Method 1<br />

Ensure ignition switched OFF.<br />

Bridge black data link connector (DLC) terminal 1 rn [A] <strong>and</strong><br />

brown or white data link connector (DLC) terminal 1 [B]<br />

with a switched lead - contacts normally open.<br />

Connect LED test lamp between data link connector (DLC)<br />

terminal 2 rn [A] <strong>and</strong> ECM terminal 4.<br />

Access trouble codes. Switch ignition OFF.<br />

Operate switch <strong>and</strong> hold.<br />

Switch ignition ON.<br />

Release switch after 5 seconds. Check that LED flashes.<br />

ldle speed control (ISC) actuator activated. <strong>Trouble</strong> code<br />

displayed: 1232.<br />

Operate switch for 4-6 seconds to activate each of the<br />

following components:<br />

Intake manifold heater. <strong>Trouble</strong> code displayed: 4342.<br />

u Evaporative emission (EVAP) canister purge valve. <strong>Trouble</strong><br />

code displayed: 4343.<br />

After activation of last component operate switch for<br />

4-6 seconds to display flash code 0000 (long flashes).<br />

<strong>Fault</strong> memory automatically erased.<br />

Repeat checking procedure to ensure no data remains in<br />

ECM fault memory.<br />

Method 2<br />

Ensure ignition switched OFF.<br />

Disconnect ECM multi-plug or battery earth lead<br />

NOTE: ECM adaptive memory may be erased causing erratic<br />

running faults. Carry out road test to allow ECM to<br />

re-learn basic values.<br />

WARNING: Disconnecting the battery may erase memory from<br />

electronic units (e.g. radio, clock).<br />

<strong>Trouble</strong> code identification<br />

I<br />

0000 I End of test sequence -<br />

1111 I Engine control module (ECM) I ECM<br />

Probable cause<br />

1231 I Vehicle speed sensor (VSS) I Wiring, speedometer, VSS<br />

1232 I Idle speed control (ISC) actuator I Wiring, multi-plug incorrectly wired, ISC actuator<br />

2113 El I Crankshaft position (CKP) sensor I Insecure rotor, wiring, CKP sensor<br />

Closed throttle position (CTP) switch<br />

Accelerator cable adjustment, CTP switch adjustment,<br />

wiring, CTP switch<br />

2212 I Throttle position (TP) sensor I Wiring, poor connection, TP sensor<br />

2234 I Engine control module (ECM) - supply voltage ( Battery, wiring<br />

2312 I Engine coolant temperature (ECT) sensor I Wiring, poor connection, ECT sensor<br />

2322 / Intake air temperature (IAT) sensor I Wiring, IAT sensor<br />

2341 H Heated oxygen sensor (H02S) - lambda control Heating inoperative, exhaust leak, misfire, fuel<br />

pressurelpump, EVAP canister purge valve<br />

2342<br />

2413 H<br />

I<br />

4444 ] No fault found<br />

Heated oxygen sensor (H02S)<br />

Mixture control (MC)<br />

Wiring, H02S, heating inoperative, fuel level low<br />

Fuel level low, fuel pressurelpump, intakelexhaust leak,<br />

misfire, H02S, EVAP canister purge valve, injector,<br />

excessive fuel in engine oil<br />

-<br />

El <strong>Trouble</strong> code may be displayed if engine is not idling during self-diagnosis due to missing CKP sensor signal. Ignore trouble code if<br />

engine starts.<br />

H After repairs, erase learnt lambda control values: Wait 30 seconds. Disconnect battery or ECM multi-plug for at least 30 seconds.<br />

Carry out road test to allow ECM to re-learn basic values.

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