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

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1 140 I,,,,,,,,,,<br />

I<strong>Autodata</strong><br />

1 Engine management<br />

Erasing<br />

Ensure ignition switched OFF.<br />

Connect LED test lamp between black data link connector<br />

(DLC) terminal 2 rn [A] <strong>and</strong> blue data link connector (DLC)<br />

terminal 2 0 [C].<br />

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

brownlwhitelyellow data link connector (DLC) terminal 1<br />

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

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

Operate switch. Switch ignition ON after 4-6 seconds.<br />

Release switch after 4-6 seconds. Check that LED flashes.<br />

Differential pressure regulator activated. <strong>Trouble</strong> code<br />

displayed: 4341.<br />

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

following components:<br />

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

code displayed: 4343.<br />

ldle air control (IAC) valve. <strong>Trouble</strong> code displayed: 4431.<br />

Cold start injector. <strong>Trouble</strong> code displayed: 4443.<br />

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

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

Operate switch for 4-6 seconds to erase fault memory.<br />

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

ECM fault memory.<br />

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

Flash type<br />

4-digit<br />

0000<br />

<strong>Fault</strong> location 1 Probable cause<br />

End of test sequence<br />

Engine control module (ECM)<br />

Vehicle speed sensor (VSS)<br />

Camshaft position (CMP) sensor, cylinder 4 HT lead<br />

Crankshaft position (CKP) sensor<br />

Closed throttle position (CTP) switch<br />

Wide open throttle (WOT) switch<br />

Knock control - control limit exceeded<br />

Knock sensor (KS) 1<br />

Knock sensor (KS) 2<br />

I<br />

-<br />

ECM<br />

Wiring, speedometer, VSS<br />

CMP sensor tabs not facing towards distributor,<br />

spark plug(s), HT lead@), distributor caplrotor,<br />

wiring, CMP sensor<br />

Insecure rotor, wiring, CKP sensor, volume air flow<br />

(VAF) sensor plate tighffsticking<br />

Accelerator cable adjustment, CTP switch<br />

adjustment, throttle valve tighffsticking, wiring,<br />

CTP switch<br />

Accelerator cable adjustment, wiring, WOT switch<br />

Incorrect fuellcompression, ignition timing,<br />

screening of KS wiring, insecure engine component<br />

I Wiring, KS, ECM<br />

I Wiring, KS, ECM<br />

ldle speed control Ignition timing, EVAP canister purge valve 112,<br />

intake leak, VAF sensor, throttle valve adjustment,<br />

AC signal missing, wiring<br />

Volume air flow (VAF) sensor<br />

Wiring, VAF sensor<br />

Engine coolant temperature (ECT) sensor<br />

Wiring, poor connection, ECT sensor<br />

Heated oxygen sensor (H02S) - lambda control Mixture adjustment, HO2S heaterlwiring, cold start<br />

injector, EVAP canister purge valve, intakelexhaust<br />

leak, ECM earth wire to intake manifold<br />

Heated oxygen sensor (H02S)<br />

Wiring, HOZS, heating inoperative<br />

Idle air control (IAC) valve<br />

Wiring, IAC valve, ECM<br />

No fault found I -

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