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

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Erasing<br />

NOTE: Some models 1992 -+ may require diagnostic equipment<br />

to erase trouble codes.<br />

Switch ignition OFF.<br />

Disconnect battery earth lead for 60 seconds.<br />

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

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

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

ECM fault memory.<br />

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

Flash type<br />

12<br />

13<br />

14<br />

15<br />

<strong>Fault</strong> location<br />

Start <strong>and</strong> end of diaanosis<br />

Heated oxygen sensor (H02S)loxygen sensor (02s) - open<br />

circuit<br />

Engine coolant temperature (ECT) sensor - voltage low<br />

Engine coolant temperature (ECT) sensor - voltage high<br />

Probable cause<br />

16 I Knock sensor (KS) 1 - signal I Wiring, KS<br />

17 I Injector(s) - circuit malfunction I Wiring, injectors, ECM<br />

18<br />

19<br />

21<br />

Engine control module (ECM) - KS control<br />

Engine speed (RPM) sensor - incorrect signal<br />

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

22 1 Throttle position (TP) sensor - vdtage low 1 Wiring short to earth, TP sensor, ECM<br />

-<br />

Wiring, H02S102S, ECM<br />

24 I Vehicle speed sensor (VSS) - no signal I Wiring, VSS, ECM<br />

Wiring short to earth, ECT sensor, ECM<br />

Wiring short to positive. ECT sensor, ECM<br />

- - -<br />

Internal KS control failure<br />

Wiring, RPM sensor, reluctor ring, ECM<br />

Wiring short to positive, TP sensor, ECM<br />

2 5 I Injector(s) - voltage low I Wiring short to earth, injector, ECM<br />

28<br />

29<br />

Fuel pump relay - circuit malfunction<br />

Fuel pump relay - voltage low<br />

32 Fuel pump relay - voltage high<br />

33<br />

34<br />

35<br />

41<br />

42<br />

43<br />

44<br />

45<br />

46<br />

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

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

Engine control module (ECM), idle speed control - idle speed<br />

incorrect<br />

Engine control module (ECM), ignition signal cyl. 2 & 3 -<br />

voltage high<br />

Engine control module (ECM), ignition signal cyl. 1 8 4 -<br />

Dl - voltage high<br />

Engine control module (ECM), ignition signal - except<br />

Dl - voltage high<br />

Exhaust gas recirculation (EGR) solenoid - circuit malfunction<br />

Heated oxygen sensor (H02S)- mixture weak<br />

Heated oxygen sensor (H02S)- mixture rich<br />

Engine control module (ECM), ignition signal - voltage high<br />

Wiring, fuel pump relay, fuel pump, ECM<br />

Wiring short to earth, fuel pump relay, fuel<br />

pump, ECM<br />

Wiring short to positive, fuel pump relay,<br />

fuel pump, ECM<br />

Wiring short to positive, MAP sensor, ECM<br />

Wiring short to earth, MAP sensor, ECM<br />

Intake system, fuel system<br />

Wiring<br />

Wiring<br />

I Wiring<br />

Wiring, EGR solenoid, ECM<br />

Wiring, H02S, ECM<br />

Wiring, H02S, ECM<br />

Wiring short to positive

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