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

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l 2 . -- CHRYSLER<br />

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

Engine managemenVtransmission<br />

EOBD<br />

type<br />

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

Probable cause<br />

PI496 Engine control module (ECM) - 5 volt output ECM<br />

low<br />

PI594 1 Alternator - voltage high<br />

Wiring, battery, alternator<br />

PI595 I Cruise control Wiring open circuiffshort circuit, hoses, cruise control master<br />

switch, cruise control vacuum switching valve<br />

P1596 1 Cruise control master switch - high voltage Wiring, cruise control master switch<br />

PI597 ( Cruise control master switch - low voltage Wiring, cruise control master switch<br />

PI 598 AC refrigerant pressure sensor - high input Wiring, AC refrigerant pressure too high (cooling faulff<br />

incorrectly charged), AC refrigerant pressure sensor<br />

PI 599 AC refrigerant pressure sensor - low input Wiring, AC refrigerant pressure too low (incorrectly charged),<br />

AC refrigerant pressure sensor<br />

PI602 I Engine control module (ECM) not programmed New ECM not programmed, incorrectly programmed, ECM<br />

Pi682 I Alternator - voltage low Wiring, battery, alternator drive belt, alternator<br />

Pi 683 Cruise control<br />

Wiring, cruise control vacuum switching valve<br />

PI 684 Engine control module (ECM)- supply voltage Wiring, battery<br />

disconnected within last 50 ignition switch<br />

ON-OFF cycles<br />

PI 685 Key not programmed into immobilizer control Wiring, ignition key not matchedldamaged, immobilizer<br />

module<br />

control module<br />

PI 686 CAN data bus, immobilizer control module - Wiring, immobilizer control module<br />

no signal<br />

I<br />

PI 696 I Engine control module (ECM) - EEPROM ECM<br />

PI 756<br />

PI 757<br />

P1762<br />

error<br />

Governor pressure not equal to target<br />

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

Governor pressure not equal to target<br />

(1 5-20 PSI) - zero pressure malfunction<br />

Governor pressure sensor - incorrect signal<br />

PI 763 / Governor pressure Sensor - signal high<br />

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

supply wire open circuit, transmission fluid level, governor<br />

pressure solenoid, transmission mechanical fault, ECM -<br />

no 5 volt supply<br />

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

supply wire open circuit, transmission fluid level, governor<br />

pressure solenoid, transmission mechanical fault, ECM -<br />

no 5 volt supply<br />

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

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

pressure solenoid, governor pressure sensor, ECM<br />

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

transmission fluid level, governor pressure sensor, ECM<br />

PI764 I Governor pressure sensor - signal low Signal wire short circuit to earth, supply wire open circuit,<br />

transmission fluid level, governor pressure sensor, ECM<br />

PI 765<br />

PI 899<br />

Transmission system relay<br />

PaMneutral position (PNP) switch - input<br />

circuit malfunction<br />

Wiring open circuiffshort circuit, transmission system relay,<br />

ECM<br />

Wiring, PNP switch, ECM

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