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

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I Engine management<br />

Erasing<br />

Method 1<br />

Ensure ignition switched OFF.<br />

Connect test wire between black data link connector (DLC)<br />

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

terminal 1 0 [B].<br />

Bridge test wire terminals 3 <strong>and</strong> 4 0.<br />

Switch ignition ON.<br />

Disconnect test wire after 5 seconds.<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 />

Flash type <strong>Fault</strong> location<br />

I 1<br />

0000 I End of test sequence<br />

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

Probable cause<br />

1232 1 Idle speed control (ISC) actuator I Wiring, multi-plug incorrectly wired, ISC actuator<br />

1 Closed throttle position (CTP) switch<br />

-<br />

Accelerator cable adjustment, CTP switch<br />

adjustment, wiring, CTP switch, ignition timing<br />

vacuum control valve, TP sensor<br />

2122 1 Engine RPM signal I Wiring, CKP sensor, ignition amplifier<br />

2212 1 Throttle position (TP) sensor I Wiring, TP sensor<br />

231 2<br />

Engine coolant temperature (ECT) sensor<br />

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

Wiring, IAT sensor<br />

Oxygen sensor (02S)lheated oxygen sensor (H02S) - lntakelexhaust leak, low compression, ignition<br />

2341 1 lambda control<br />

system, fuel pressurelpump, injector, wiring, 02s<br />

2342 Oxygen sensor (02s)<br />

Wiring, 02s<br />

2343<br />

Mixture control (MC)<br />

Wiring, ECT sensor<br />

4431 I Idle speed control (ISC) actuator I Wiring, multi-plug incorrectly wired, ISC actuator<br />

4444<br />

No fault found -<br />

lntakelexhaust leak, low compression,<br />

ignition system, fuel pressurelpump, injector<br />

rn After repairs, erase trouble code <strong>and</strong> learnt lambda control values by disconnecting battery or ECM multi-plug for at least 30 seconds.<br />

Carry out road test to allow ECM to re-learn basic values.<br />

4

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