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

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I Engine management<br />

EOBD<br />

type<br />

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

AC refrigerant pressure sensor - low input<br />

Engine control module (ECM) not programmed<br />

PI603 I Engine control module (ECM) - RAM link error I ECM<br />

Engine control module (ECM) - RAM readlwrite<br />

error<br />

Engine control module (ECM) - shut down timer<br />

error<br />

I Probable cause<br />

Wiring, AC refrigerant pressure too low (incorrectly<br />

charged), AC refrigerant pressure sensor<br />

New ECM not programmed, incorrectly programmed,<br />

ECM<br />

PI681 I CAN data bus, instrumentation - no signal I Wiring, instrumentation control module<br />

Pi 687<br />

PI695<br />

Alternator - voltage low<br />

Cruise control<br />

Engine control module (ECM) - supply voltage<br />

disconnected within last 50 ignition switch ON-OFF<br />

cycles<br />

Key not programmed into immobilizer control module<br />

CAN data bus, immobilizer control module -<br />

no signal<br />

CAN data bus, instrumentation - no signal<br />

CAN data bus, body control module (BCM) -<br />

no siqnal<br />

ECM<br />

ECM<br />

PI696 1 Engine control module (ECM) - EEPROM error I ECM<br />

PI 697<br />

PI 698<br />

PI 899<br />

P2503<br />

Wiring, battery, alternator drive belt, alternator<br />

Wiring, cruise control vacuum switching valve<br />

Wiring, battery<br />

Wiring, ignition key not matchedldamaged,<br />

immobilizer control module<br />

Wiring, immobilizer control module<br />

Wiring, instrumentation control module (mechanical)<br />

Wiring, BCM<br />

Engine control module (ECM) - EEPROM error ECM<br />

CAN data bus, transmission control module (TCM) - Wiring, TCM<br />

no signal<br />

I<br />

Transmission system relay<br />

Wiring open circuitlshort circuit, transmission system<br />

relay, ECMITCM<br />

Parkheutral position (PNP) switch - input circuit Wiring, PNP switch, ECMITCM<br />

malfunction<br />

Charging system - voltage low<br />

Wiring, poor connection, battery, alternator<br />

I

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