Jeep 1987 Wrangler Workshop Manual page 1470

# R G
THROTTLE BODY FUEL INJECTION SYSTEM
m G
# R G
CONTENTS
m G
EGR Valve (Renault) 76
EGR Valve (Jeep) 77
Manifold Absolute Pressure
(MAP) Sensor 78
Electronic Control Unit
(Renault) (Wrangler/YJ) 79
Electronic Control Unit
(Wagoneer/Cherokee/Comanche) . . 80
Manifold Air/Fuel Temperature
(MAT) Sensor (Renault) 80
Manifold Air/Fuel Temperature (MAT)
Sensor (Jeep) 81
Coolant Temperature Sensor (CTS)... 82
Oxygen (0
2
) Sensor 83
Wide Open Throttle (WOT)
Switch 84
Power (B+) Relay/Fuel Pump
Relay/Compressor Clutch Relay . . 85
Cold Start Relay 86
Load Swap Relay 2.46L 86
Throttle Body Assembly (Renault)... 87
Throttle Body Assembly (Jeep) 88
Fuel Pump Assembly . . . 90
Fuel Filter (Renault) (Wagoneer/
Cherokee/Comanche) 91
Fuel Filter (Wrangler/YJ) 92
Fuel Tank, Pump/Gauge Sending
Unit (Renault) . 93
Sending Unit/Fuel Pump
(Wagoneer/Cherokee/
Comanche) 94
Sending Unit/Fuel Pump
(Wrangler/YJ) 95
Quick Connect Fuel Lines
(1987 Vehicles) 95
Diagnostic Procedures 98
Diagnostic Connectors 98
ECU Connector 99
Component Diagnosis 100
Manifold Air/Fuel Temperature
(MAT) Sensor Test 107
Coolant Temperature Sensor
(CTS) Test ...108
Wide Open Throttle (WOT)
Switch Test 109
Closed Throttle (Idle)
Switch Test 109
ISA Motor Diagnostic Test 110
Manifold Absolute Pressure
(MAP) Sensor Test 112
2.46L Oxygen Sensor Heating
Element Test 113
Idle Speed Actuator (ISA)
Motor Adjustment 114
Wide Open Throttle (WOT)
Switch Adjustment 115
Fuel Pressure Regulator
Adjustment 116
Throttle Position Potentiometer
Adjustment 1.4L/1.7L 118
Throttle Position Sensor
Adjustment 2.46L Engine 118
2.0L ENGINE 122
TBI System Vacuum Diagram 122
TBI System Wiring Diagram .123
Component Replacement 124
Fuel Injector. 124
Fuel Pressure Regulator 124
Throttle Position Sensor (TPS).. 125
Idle Speed Actuator Motor 125
Canister Purge/EGR Solenoid . . 126
EGR Valve 127
Manifold Absolute Pressure
(MAP) Sensor 128
Electronic Control Unit
(ECU) ...128
Manifold Air/Fuel Temperature
(MAT) Sensor 129
Coolant Temperature Sensor
(CTS)...... 129
Oxygen (0
2
) Sensor 130
Power (B+) Relay/Fuel Pump
Relay/Compressor Clutch
Relay 130
Throttle Body Assembly 131
Fuel Body Assembly 132
Fuel Filter 133
Fuel Tank, Pump/Gauge
Sending Unit 133