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

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CHRYSLER Model: Cherokee 2,514,0 Gr<strong>and</strong> Cherokee 4,015,215,9<br />

Wrangler 2,514,O<br />

Engine managementltransmission<br />

Year: 1998<br />

Engine code:<br />

System:<br />

VIN position 8 = P, S, Y, Z<br />

JTEC<br />

Cherokm, Wrangler<br />

I<br />

I<br />

Gr<strong>and</strong> Chemkm<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 />

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 - EOBD type<br />

EOBD<br />

type<br />

PO<br />

Probable cause<br />

Refer to EOBD trouble code table<br />

I<br />

-<br />

Heated oxygen sensor (HO2S) 1, bank 1 - slow<br />

response<br />

Heated oxygen sensor (W02S) 2, bank<br />

Wiring, heating inoperative, H02S<br />

Wiring, heating inoperative, H02S<br />

- - -.<br />

coolant thermostat,<br />

Fuel pump relay I Wiring open circuiffshort circuit, fuel pump relay<br />

Idle speed control (1SC) sy<br />

Wiring, air leak, throttle valve tighffsticking, IAC valve<br />

expected<br />

Manifold absolute pressure (MAP) sensor - no 5 vott Wiring, ECM<br />

suppty<br />

Manifold absolute pressure (MAP) sensor<br />

Wiring, hose connection(s), MAP sensor<br />

Engine control relay<br />

I Wiring open circuiffshort circuit, engine control relay

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