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

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Model: Cherokee 2,5/4,0 Gr<strong>and</strong> Cherokee 4,0/5,2/5,9 Wrangler 2,5/4,0<br />

I bl<br />

' *I Engine management/transmission<br />

Hex type <strong>Fault</strong> location Probable cause<br />

Insufficient coolant temperature for closed loop fuel<br />

control<br />

Throttle position (TP) sensor - rangelperformance<br />

problem<br />

Manifold absolute pressure (MAP) sensor - no 5 volt<br />

supply<br />

Idle speed control (ISC) system - rpm lowerlhigher than<br />

expected<br />

Governor pressure not equal to target<br />

(15-20 PSI) - mid pressure malfunction<br />

Governor pressure not equal to target - low pressure<br />

malfunction<br />

Torque converter clutch (TCC) solenoid - circuit<br />

malfunction<br />

Fuel level sensor - low input<br />

Fuel level sensor - high input<br />

Fuel level sensor - malfunction<br />

Battery ambient temperature sensor - voltage low<br />

Battery ambient temperature sensor - voltage high<br />

Heated oxygen sensor (H02S) 1, bank 1 - low voltage<br />

Heated oxygen sensor (H02S) 2, bank 1 - low voltage<br />

Crankshaft position (CKP) sensorlcamshaft position<br />

(CMP) sensor - intermittent signal<br />

Evaporative emission (EVAP) system - small leak<br />

detected<br />

Evaporative emission (EVAP) system - large leak<br />

detected<br />

Transmission fluid temperature (TFT) sensor -<br />

rangelperformance problem<br />

Gear selection, 3-4 - shift malfunction<br />

Output shaft speed (OSS) sensor - circuit malfunction<br />

Governor pressure sensor - signal low<br />

Governor pressure sensor - signal high<br />

Governor pressure sensor - incorrect signal<br />

Transmission fluid pressure (TFP) solenoid - electrical<br />

Transmission system relay<br />

Wiring, engine cooling system, coolant thermostat,<br />

ECT sensor<br />

Wiring, accelerator cable adjustment, TP sensor<br />

Wiring, ECM<br />

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

Signal wire open circuiffshort circuit, valve body,<br />

sensor supply wire open circuit, transmission fluid<br />

level, governor pressure solenoid, transmission<br />

mechanical fault, ECM - no 5 volt supply<br />

Signal wire open circuiffshort circuit, valve body,<br />

sensor supply wire open circuit, transmission fluid<br />

level, governor pressure solenoid, transmission<br />

mechanical fault, ECM - no 5 volt supply<br />

Wiring, TCC solenoid<br />

Wiring open circuit, fuel level sensor<br />

Wiring short circuit to positive, fuel level sensor<br />

Wiring, fuel level sensor<br />

Wiring, battery ambient temperature sensor<br />

Wiring, battery ambient temperature sensor<br />

Wiring short circuit to earth, exhaust leak, HO2S<br />

Wiring short circuit to earth, exhaust leak, HO2S<br />

Wiring, poor connection, air gap, CKP sensor,<br />

CMP sensor<br />

Hose connection(s), intake leak, EVAP canister,<br />

EVAP canister purge valve<br />

Hose connection(s), intake leak, EVAP canister,<br />

EVAP canister purge valve<br />

Wiring, TFT sensor<br />

Wiring, TR sensor, shift solenoids, transmission<br />

mechanical fault<br />

Wiring, OSS sensor, ECM<br />

Signal wire short circuit to earth, supply wire open<br />

circuit, transmission fluid level, governor pressure<br />

sensor, ECM<br />

Signal wire short circuit to positive, supply wire open<br />

circuit, transmission fluid level, governor pressure<br />

sensor, ECM<br />

Signal wire short circuit to earthlpositive, supply wire<br />

open circuiffshort circuit, transmission fluid level,<br />

governor pressure solenoid, governor pressure<br />

sensor, ECM<br />

Wiring, TFP solenoid, ECM<br />

Wiring open circuiffshort circuit, transmission<br />

system relay, ECM

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