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FUEL AND EMISSION
O U TLIN E...........................................4B—
SYSTEM DIAGRAM.......................4B—
COMPONENT LOCATION........... 4B—
VACUUM HOSE ROUTING
DIAGRAM.................................... 4B—
SPECIFICATIONS.......................... 4B—
TROUBLESHOOTING GUIDE.........4B—
TROUBLESHOOTING WITH SST.. 4B— 10
INSPECTION PROCEDURE......... 4B— 11
AFTER-REPAIR PROCEDURE..... 4B— 11
PRINCIPLE OF CODE CYCLE..... 4B— 13
CODE NUMBER............................4B— 14
SWITCH MONITOR FUNCTION..... 4B— 32
INSPECTION PROCEDURE.........4B— 33
IDLE ADJUSTMENT........................ 4B— 36
IDLE SPEED................................. 4B— 36
IDLE MIXTURE.............................. 4B— 37
INTAKE AIR SYSTEM..................... 4B— 38
COMPONENT DESCRIPTIONS.... 4B— 38
REMOVAL......................................4B— 39
PARTS INSPECTION.................... 4B— 40
REPLACEMENT............................. 4B— 42
INSTALLATION.............................. 4B— 43
IDLE SPEED CONTROL (ISC)
SYSTEM...........................................4B— 45
COMPONENT DESCRIPTIONS.... 4B— 46
TROUBLESHOOTING................... 4B— 47
TURBOCHARGING SYSTEM.........4B— 50
COMPONENT DESCRIPTIONS.... 4B— 50
TROUBLESHOOTING...................4B— 51
OPERATION NOTE.......................4B— 51
SERVICE NOTE............................. 4B— 51
TURBOCHARGER BOOST
PRESSURE.................................. 4B— 52
WASTE GATE................................4B— 52
AIR BYPASS VALVE......................4B— 52
INTERCOOLER.............................. 4B— 52
OVERBOOST WARNING.............. 4B— 53
TURBOCHARGER......................... 4B— 53
FUEL SYSTEM .................................4B— 57
COMPONENT DESCRIPTIONS.... 4B— 58 -
TROUBLESHOOTING................... 4B— 59
FUEL PRESSURE RELEASE AND
SERVICING FUEL SYSTEM........4B— 60
MULTI-PRESSURE TESTER.........4B— 61
FUEL PRESSURE......................... 4B— 63
FUEL PUMP.................................. 4B— 64
CONTROL SYSTEMS
(TURBO)
2 •
2
3
6
7
8
PULSATION DAMPER.................. 4B— 65
INJECTOR...................................... 4B — 66
TRANSFER PUMP CONTROL
SYSTEM (4 WHEEL STEERING). 4B— 68
PRESSURE REGULATOR
CONTROL SYSTEM.................... 4B— 69
COMPONENT DESCRIPTIONS.... 4B— 70
TROUBLESHOOTING................... 4B— 71
REPLACEMENT............................. 4B— 73
FUEL TANK................................... 4B— 79
DECELERATION CONTROL
SYSTEM.........................................4B— 82
COMPONENT DESCRIPTIONS.... 4B— 83
TROUBLESHOOTING................... 4B— 84
ELECTRONIC SPARK ADVANCE
(ESA) CONTROL SYSTEM..........4B— 86
COMPONENT DESCRIPTIONS.... 4B— 87
TROUBLESHOOTING................... 4B— 88
EXHAUST GAS RECIRCULATION
(EGR) SYSTEM.............................4B— 90
COMPONENT DESCRIPTIONS.... 4B— 91
TROUBLESHOOTING................... 4B— 92
EVAPORATIVE EMISSION
CONTROL (EEC) SYSTEM..........4B— 96
POSITIVE CRANKCASE
VENTILATION (PCV) SYSTEM.... 4 B - 97
EXHAUST SYSTEM........................ 4B— 98
CONTROL SYSTEM.......................4B— 99
RELATIONSHIP CHART............... 4B—100
EGI MAIN FUSE............................ 4B—102
MAIN RELAY................................. 4B—102
CIRCUIT OPENING RELAY.......... 4B—102
ENGINE CONTROL UNIT............. 4B—103
NEUTRAL SWITCH....................... 4B—108
CLUTCH SWITCH......................... 4B—108
BRAKE LIGHT SWITCH............... 4B—108
P/S PRESSURE SWITCH.............. 4B—109
INHIBITOR SWITCH..................... 4B—109
E/L CONTROL UNIT...................... 4B—110
AIR FLOW METER........................ 4B—111
THROTTLE SENSOR.................... 4B—112
IDLE SWITCH................................. 4B—116
WATER THERMO SENSOR......... 4B—116
WATER THERMO SWITCH.......... 4B—116
OXYGEN SENSOR........................ 4B—117
ATMOSPHERIC PRESSURE
SENSOR....................................... 4B—118
4B
86U04B-001
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Table of Contents
Troubleshooting
