2003 Jeep Liberty KJ Gas Powertrain Service Manual – PDF DOWNLOAD
DESCRIPTION:
2003 Jeep Liberty KJ Gas Powertrain Service Manual – PDF DOWNLOAD
INTRODUCTION:
The procedures contained in this manual include specifications, instructions, and graphics needed to diagnose the PCM Powertrain System. The diagnostics in this manual are based on the failure condition or symptom being present at the time of diagnosis. Please follow the recommendations below when choosing your diagnostic path.
- When repairs are required, refer to the appropriate service manual for the proper removal and repair procedure. Diagnostic procedures change every year. New diagnostic systems may be added; current systems may be enhanced. READ THIS MANUAL BEFORE TRYING TO DIAGNOSE A VEHICLE DTC.
- It is recommended that you review the entire manual to become familiar with all new and enhanced diagnostic procedures. After using this book, if you have any comments or recommendations, please fill out the form at the back of the book and mail it back to us.
IDENTIFICATION OF SYSTEM
The Powertrain Control Module (PCM) monitors and controls:
² fuel system
² ignition system
² charging system
² speed control system
² automatic transmission (“XXRE,45RFE” transmissions)
TABLE OF CONTENTS:
2003 Jeep Liberty KJ Gas Powertrain Service Manual – PDF DOWNLOAD
1 0 INTRODUCTION 1
1 1 SYSTEM COVERAGE 1
1 2 SIX-STEP TROUBLESHOOTING PROCEDURE 1
2 0 IDENTIFICATION OF SYSTEM 1
3 0 SYSTEM DESCRIPTION AND FUNCTIONAL OPERATION 1
3 1 GENERAL DESCRIPTION 1
3 2 FUNCTION OPERATION 1
3 2 1 FUEL CONTROL (GAS) 1
3 2 2 ON BOARD DIAGNOSTICS 2
3 2 3 TRANSMISSION CONTROL 5
3 2 4 OTHER CONTROLS 5
3 2 5 NON-MONITORED CIRCUITS 10
3 2 6 SKIS OVERVIEW 10
3 2 7 SKIM ON-BOARD DIAGNOSTICS 10
3 2 8 SKIS OPERATION 10
3 2 9 PROGRAMMING THE POWERTRAIN CONTROL MODULE 11
3 2 10 PROGRAMMING THE SENTRY KEY IMMOBILIZER MODULE 11
3 2 11 PROGRAMMING THE IGNITION KEYS TO THE SENTRY KEY
IMMOBILIZER MODULE 12
3 3 DIAGNOSTIC TROUBLE CODES 12
3 3 1 HARD CODE 12
3 3 2 INTERMITTENT CODE 12
3 3 3 STARTS SINCE SET COUNTER 13
3 3 4 NO START INFORMATION 13
3 4 USING THE DRBIIIT 13
3 5 DRBIIIT ERROR MESSAGES AND BLANK SCREEN 13
3 5 1 DRBIIIT DOES NOT POWER UP 13
3 5 2 DISPLAY IS NOT VISIBLE 14
4 0 DISCLAIMERS, SAFETY, WARNINGS 14
4 1 DISCLAIMERS 14
4 2 SAFETY 14
4 2 1 TECHNICIAN SAFETY INFORMATION 14
4 2 2 VEHICLE PREPARATION FOR TESTING 14
4 2 3 SERVICING SUB-ASSEMBLIES 14
4 2 4 DRBIIIT SAFETY INFORMATION 14
4 3 WARNINGS AND CAUTIONS 15
4 3 1 ROAD TEST WARNINGS 15
4 3 2 VEHICLE DAMAGE CAUTIONS 15
5 0 REQUIRED TOOLS AND EQUIPMENT 15
6 0 ACRONYMS 15
i
TABLE OF CONTENTS – Continued
7 0 DIAGNOSTIC INFORMATION AND PROCEDURES 19
COMMUNICATION
*NO RESPONSE FROM PCM (PCI BUS) 20
*NO RESPONSE FROM PCM (SCI ONLY) 22
*NO RESPONSE FROM SENTRY KEY IMMOBILIZER MODULE 25
*PCI BUS COMMUNICATION FAILURE 27
DRIVEABILITY – GAS
INTERMITTENT CONDITION 29
P0031-O2 SENSOR 1/1 HEATER CIRCUIT LOW 30
P0032-O2 SENSOR 1/1 HEATER CIRCUIT HIGH 30
P0037-O2 SENSOR 1/2 HEATER CIRCUIT LOW 30
P0038-O2 SENSOR 1/2 HEATER CIRCUIT HIGH 30
P0051-O2 SENSOR 2/1 HEATER CIRCUIT LOW 30
P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH 30
P0071-AMBIENT/BATTERY TEMP SENSOR PERFORMANCE 33
P0107-MAP SENSOR VOLTAGE TOO LOW 36
P0108-MAP SENSOR VOLTAGE TOO HIGH 38
P0111-INTAKE AIR TEMP SENSOR PERFORMANCE 40
P0112-INTAKE AIR TEMP SENSOR VOLTAGE TOO LOW 42
P0113-INTAKE AIR TEMP SENSOR VOLTAGE TOO HIGH 44
P0117-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO LOW 46
P0118-ENGINE COOLANT TEMP SENSOR VOLTAGE TOO HIGH 48
P0121-TP SENSOR VOLTAGE DOES NOT AGREE WITH MAP 50
P0122-THROTTLE POSITION SENSOR #1 VOLTAGE TOO LOW 55
P0123-THROTTLE POSITION SENSOR #1 VOLTAGE TOO HIGH 58
P0125-CLOSED LOOP TEMP NOT REACHED 61
P0131-O2 SENSOR 1/1 VOLTAGE TOO LOW 63
P0137-O2 SENSOR 1/2 VOLTAGE TOO LOW 63
P0151-O2 SENSOR 2/1 VOLTAGE TOO LOW 63
P0157-O2 SENSOR 2/2 VOLTAGE TOO LOW 63
P0132-O2 SENSOR 1/1 VOLTAGE TOO HIGH 66
P0138-O2 SENSOR 1/2 VOLTAGE TOO HIGH 66
P0152-O2 SENSOR 2/1 VOLTAGE TOO HIGH 66
P0158-O2 SENSOR 2/2 VOLTAGE TOO HIGH 66
P0133-O2 SENSOR 1/1 SLOW RESPONSE 69
P0139-O2 SENSOR 1/2 SLOW RESPONSE 69
P0153-O2 SENSOR 2/1 SLOW RESPONSE 69
P0159-O2 SENSOR 2/2 SLOW RESPONSE 69
P0135-O2 SENSOR 1/1 HEATER FAILURE 72
P0141-O2 SENSOR 1/2 HEATER FAILURE 72
P0155-O2 SENSOR 2/1 HEATER FAILURE 72
P0161-O2 SENSOR 2/2 HEATER FAILURE 72
P0136-O2 SENSOR 1/2 HEATER CIRCUIT MALFUNCTION 75
P0171-1/1 FUEL SYSTEM LEAN 77
P0174-2/1 FUEL SYSTEM LEAN 77
P0172-1/1 FUEL SYSTEM RICH 82
P0175-2/1 FUEL SYSTEM RICH 82
P0201-INJECTOR #1 CONTROL CIRCUIT 87
P0202-INJECTOR #2 CONTROL CIRCUIT 87
P0203-INJECTOR #3 CONTROL CIRCUIT 87
P0204-INJECTOR #4 CONTROL CIRCUIT 87
ii
TABLE OF CONTENTS – Continued
P0205-INJECTOR #5 CONTROL CIRCUIT 87
P0206-INJECTOR #6 CONTROL CIRCUIT 87
P0300-MULTIPLE CYLINDER MIS-FIRE 90
P0301-CYLINDER #1 MISFIRE 90
P0302-CYLINDER #2 MISFIRE 90
P0303-CYLINDER #3 MISFIRE 90
P0304-CYLINDER #4 MISFIRE 90
P0305-CYLINDER #5 MISFIRE 90
P0306-CYLINDER #6 MISFIRE 90
P0320-NO CRANK REFERENCE SIGNAL AT PCM 97
P0325-KNOCK SENSOR #1 CIRCUIT 101
P0330-KNOCK SENSOR #2 CIRCUIT 101
P0340-NO CAM REFERENCE SIGNAL AT PCM 104
P0351-IGNITION COIL #1 PRIMARY CIRCUIT 108
P0352-IGNITION COIL #2 PRIMARY CIRCUIT 108
P0351-IGNITION COIL #1 PRIMARY CIRCUIT 111
P0352-IGNITION COIL #2 PRIMARY CIRCUIT 111
P0353-IGNITION COIL #3 PRIMARY CIRCUIT 111
P0354-IGNITION COIL #4 PRIMARY CIRCUIT 111
P0355-IGNITION COIL #5 PRIMARY CIRCUIT 111
P0356-IGNITION COIL #6 PRIMARY CIRCUIT 111
P0420-1/1 CATALYTIC CONVERTER EFFICIENCY 115
P0432-2/1 CATALYTIC CONVERTER EFFICIENCY 115
P0441-EVAP PURGE FLOW MONITOR 117
P0442-EVAP LEAK MONITOR MEDIUM 0 040 LEAK DETECTED 119
P0455-EVAP LEAK MONITOR LARGE LEAK DETECTED 119
P0456-EVAP LEAK MONITOR 020 LEAK DETECTED 119
P0443-EVAP PURGE SOLENOID CIRCUIT 122
P0460-FUEL LEVEL UNIT NO CHANGE OVER MILES 124
P0461-FUEL LEVEL UNIT NO CHANGE OVER TIME 124
P0462-FUEL LEVEL SENDING UNIT VOLTS TOO LOW 125
P0463-FUEL LEVEL SENDING UNIT VOLTS TOO HIGH 127
P0500-NO VEHICLE SPEED SIGNAL 129
P0505-IDLE AIR CONTROL MOTOR CIRCUITS 131
P0523-OIL PRESSURE VOLTAGE TOO HIGH 133
P0551-POWER STEERING SWITCH FAILURE 135
P0601-PCM INTERNAL CONTROLLER FAILURE 137
P0622-GENERATOR FIELD NOT SWITCHING PROPERLY 138
P0645-A/C CLUTCH RELAY CIRCUIT 140
P0700-EATX CONTROLLER DTC PRESENT 142
P1195-O2 SENSOR 1/1 SLOW DURING CATALYST MONITOR 143
P1196-O2 SENSOR 2/1 SLOW DURING CATALYST MONITOR 143
P1281-ENGINE IS COLD TOO LONG 145
P1282-FUEL PUMP/SYSTEM RELAY CONTROL CIRCUIT 146
P1294-TARGET IDLE NOT REACHED 148
P1296-NO 5-VOLTS TO MAP SENSOR 150
P1297-NO CHANGE IN MAP FROM START TO RUN 152
P1299-VACUUM LEAK FOUND 155
P1388-AUTO SHUTDOWN RELAY CONTROL CIRCUIT 156
P1389-NO ASD RELAY OUTPUT VOLTAGE AT PCM 158
P1391-INTERMITTENT LOSS OF CMP OR CKP 160
P1398-MIS-FIRE ADAPTIVE NUMERATOR AT LIMIT 164
P1486-EVAP LEAK MONITOR PINCHED HOSE FOUND 166
iii
TABLE OF CONTENTS – Continued
P1491-COOLING FAN RELAY CONTROL CIRCUIT 168
P1492-AMBIENT/BATTERY TEMP SENSOR VOLTAGE TOO HIGH 170
P1493-AMBIENT/BATTERY TEMP SENSOR VOLTAGE TOO LOW 172
P1494-LEAK DETECTION PUMP SW OR MECHANICAL FAULT 174
P1495-LEAK DETECTION PUMP SOLENOID CIRCUIT 176
P1594-CHARGING SYSTEM VOLTAGE TOO HIGH 178
P1595-SPEED CONTROL SERVO SOLENOID CIRCUITS 180
P1683-SPEED CONTROL POWER CIRCUIT 180
P1596-SPEED CONTROL SWITCH ALWAYS HIGH 184
P1597-SPEED CONTROL SWITCH ALWAYS LOW 187
P1598-A/C PRESSURE SENSOR VOLTAGE TOO HIGH 189
P1599-A/C PRESSURE SENSOR VOLTAGE TOO LOW 191
P1682-CHARGING SYSTEM VOLTAGE TOO LOW 193
P1685-WRONG OR INVALID KEY MSG RECEIVED FROM SKIM 196
P1686-NO SKIM BUS MESSAGE RECEIVED 198
P1687-NO CLUSTER BUS MESSAGE 200
P1696-PCM FAILURE EEPROM WRITE DENIED 201
P1698-NO BUS MESSAGE FROM TRANS CONTROL MODULE 203
P1830-CLUTCH OVERRIDE RELAY CONTROL CIRCUIT 205
P1899-P/N SWITCH PERFORMANCE 207
*BRAKE SWITCH SENSE STATUS DOES NOT CHANGE ON DRBIIIT 209
*CHECKING A/C SYSTEM OPERATION WITH NO DTCS 212
*CHECKING CHARGING SYSTEM OPERATION WITH NO DTCS 215
*CHECKING HARD TO FILL WITH FUEL 218
*CHECKING RADIATOR FAN OPERATION WITH NO DTCS 219
*CHECKING THE PCM POWER AND GROUNDS 221
SENTRY KEY IMMOBILIZER
ANTENNA FAILURE 222
COP FAILURE 222
EEPROM FAILURE 222
INTERNAL FAULT 222
RAM FAILURE 222
SERIAL LINK INTERNAL FAULT 222
STACK OVERFLOW FAILURE 222
PCM STATUS FAILURE 224
SERIAL LINK EXTERNAL FAULT 224
ROLLING CODE FAILURE 226
VIN MISMATCH 226
TRANSPONDER COMMUNICATION FAILURE 228
TRANSPONDER CYCLIC REDUNDANCY CHECK (CRC) FAILURE 228
TRANSPONDER ID MISMATCH 228
TRANSPONDER RESPONSE MISMATCH 228
STARTING
*CHECKING FUEL DELIVERY 231
*CHECKING HARD START (FUEL DELIVERY SYSTEM) 234
*ENGINE CRANKS BUT DOES NOT START 236
*FUEL PRESSURE LEAK DOWN 239
*NO CRANK CONDITION 240
*NO RESPONSE FROM PCM WITH A NO START CONDITION 243
*START AND STALL CONDITION 246
*STARTS IN ALL GEARS WITH CLUTCH PEDAL RELEASED 248
iv
TABLE OF CONTENTS – Continued
TRANSFER CASE – MECHANICAL
P0836-4WD MUX SWITCH STUCK 249
P0837-4WD MUX SWITCH PERFORMANCE 252
P0838-4WD MODE SENSOR LOW 254
P0839-4WD MODE SENSOR HIGH 256
VERIFICATION TESTS
VERIFICATION TESTS 258
8 0 COMPONENT LOCATIONS 265
8 1 CONTROL MODULES AND PDC 265
8 2 DATALINK CONNECTOR 265
8 3 SENSORS AND SOLENOIDS 266
8 4 FUEL SYSTEM 270
8 5 SWITCHES 271
9 0 CONNECTOR PINOUTS 273
A/C COMPRESSOR CLUTCH 273
A/C LOW PRESSURE SWITCH 273
A/C PRESSURE TRANSDUCER (GAS) 273
BATTERY TEMPERATURE SENSOR 273
BRAKE LAMP SWITCH 274
CAMSHAFT POSITION SENSOR (2 4L) 274
CAMSHAFT POSITION SENSOR (3 7L) 274
CAPACITOR (2 4L) 274
CLUTCH INTERLOCK SWITCH (M/T) 275
COIL ON PLUG NO 1 (3 7L) 275
COIL ON PLUG NO 2 (3 7L) 275
COIL ON PLUG NO 3 (3 7L) 275
COIL ON PLUG NO 4 (3 7L) 276
COIL ON PLUG NO 5 (3 7L) 276
COIL ON PLUG NO 6 (3 7L) 276
COIL RAIL (2 4L) 276
CRANKSHAFT POSITION SENSOR (2 4L) 277
CRANKSHAFT POSITION SENSOR (3 7L) 277
DATA LINK CONNECTOR 277
ENGINE COOLANT TEMPERATURE SENSOR (GAS) 278
ENGINE OIL PRESSURE SWITCH (GAS) 278
EVAP/PURGE SOLENOID 278
FUEL INJECTOR NO 1 (GAS) 278
FUEL INJECTOR NO 2 (GAS) 279
FUEL INJECTOR NO 3 (GAS) 279
FUEL INJECTOR NO 4 (GAS) 279
FUEL INJECTOR NO 5 (3 7L) 279
FUEL INJECTOR NO 6 (3 7L) 280
FUEL PUMP MODULE 280
GENERATOR 280
GENERATOR 280
IDLE AIR CONTROL MOTOR 281
IGNITION SWITCH 281
INTAKE AIR TEMPERATURE SENSOR (GAS) 281
v
TABLE OF CONTENTS – Continued
FUSES (JB) 283
LEAK DETECTION PUMP 283
LEFT SPEED CONTROL SWITCH (EXCEPT BASE) 284
MANIFOLD ABSOLUTE PRESSURE SENSOR 284
OXYGEN SENSOR 1/1 UPSTREAM 284
OXYGEN SENSOR 1/2 DOWNSTREAM 284
OXYGEN SENSOR 2/1 UPSTREAM (3 7L) 285
OXYGEN SENSOR 2/2 DOWNSTREAM (3 7L) 285
FUSES (GAS) 287
AUTO SHUT DOWN RELAY 287
CLUTCH SWITCH OVERRIDE RELAY (M/T) 288
FUEL PUMP RELAY (GAS) 288
OXYGEN SENSOR DOWNSTREAM RELAY (GAS) 288
STARTER MOTOR RELAY 288
POWER STEERING PRESSURE SWITCH 289
POWERTRAIN CONTROL MODULE C1 (2 4L) 289
POWERTRAIN CONTROL MODULE C1 (3 7L) 290
POWERTRAIN CONTROL MODULE C2 (GAS) 291
POWERTRAIN CONTROL MODULE C3 (GAS) 292
RADIATOR FAN MOTOR 292
RADIATOR FAN RELAY 293
REAR WHEEL SPEED SENSOR 293
RIGHT SPEED CONTROL SWITCH (EXCEPT BASE) 293
SPEED CONTROL SERVO 293
THROTTLE POSITION SENSOR (GAS) 294
TRAILER TOW BRAKE LAMP RELAY 294
10 0 SCHEMATIC DIAGRAMS 295
11 0 CHARTS AND GRAPHS 299
VIDEO PREVIEW OF THE MANUAL:
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2003 Jeep Liberty KJ Gas Powertrain Service Manual
2003 Jeep Liberty KJ Gas Powertrain Service Manual
2003 Jeep Liberty KJ Gas Powertrain Service Manual
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