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

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CHRYSLER Model: Cherokee 2,5/4,0 Gr<strong>and</strong> Cherokee 4,014,7<br />

Wrangler 2,5/4,0<br />

Engine management/transmission<br />

Year: 1999-02<br />

Engine code:<br />

System:<br />

VIN position 8 = N, P, S<br />

JTEC<br />

Gr<strong>and</strong> Cherokee<br />

General information<br />

Refer to the front of this manual for general test conditions,<br />

terminology, detailed descriptions of wiring faults <strong>and</strong> a<br />

general trouble shooter for electrical <strong>and</strong> mechanical faults.<br />

Malfunction indicator lamp (MIL) will illuminate or flash if<br />

certain faults are recorded.<br />

ECM operates in emergency mode if sensors fail, to enable<br />

vehicle to be driven to workshop.<br />

Accessing <strong>and</strong> erasing<br />

The engine control module (ECM) fault memory can only be<br />

accessed <strong>and</strong> erased using diagnostic equipment<br />

connected to the data link connector (DLC).<br />

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

EOBD<br />

type<br />

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

Refer to EOBD trouble code table<br />

Decreased engine performance - high intake<br />

air temperature<br />

Intake air temperature (IAT) sensor - voltage<br />

low<br />

Intake air temperature (IAT) sensor - voltage<br />

high<br />

Probable cause<br />

PI194 Heated oxygen sensor (HOZS), heater 1 Wiring, HOZS, ECM<br />

control - circuit malfunction<br />

-<br />

Wiring open circuitlshort to positive, earth wire defective, IAT<br />

sensor, ECT sensor, engine cooling system, high engine bay<br />

temperature, ECM<br />

Wiring, IAT sensor, ECM<br />

Wiring, IAT sensor, ECM

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