13B-1
GROUP 13B
CONTENTS
GENERAL DESCRIPTION. . . . . . . . . 13B-3
MULTIPORT FUEL INJECTION (MFI)
DIAGNOSIS . . . . . . . . . . . . . . . . . . . . 13B-6
TROUBLESHOOTING STRATEGY . . . . . . 13B-6
TROUBLE CODE DIAGNOSIS. . . . . . . . . . 13B-6
FAIL-SAFE FUNCTION REFERENCE
TABLE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-21
DIAGNOSTIC TROUBLE CODE CHART . . 13B-22
SYMPTOM CHART. . . . . . . . . . . . . . . . . . . 13B-26
DIAGNOSTIC TROUBLE CODE
PROCEDURES. . . . . . . . . . . . . . . . . . . . . . 13B-29
SYMPTOM PROCEDURES . . . . . . . . . . . . 13B-530
DATA LIST REFERENCE TABLE . . . . . . . 13B-640
ACTUATOR TEST REFERENCE TABLE. . 13B-654
CHECK AT THE ENGINE CONTROL MODULE
(ECU) <M/T> OR POWERTRAIN CONTROL
MODULE (PCM) <A/T>. . . . . . . . . . . . . . . . 13B-655
INSPECTION PROCEDURE USING AN
OSCILLOSCOPE . . . . . . . . . . . . . . . . . . . . 13B-661
SPECIAL TOOLS. . . . . . . . . . . . . . . . 13B-671
ON-VEHICLE SERVICE. . . . . . . . . . . 13B-672
COMPONENT LOCATION . . . . . . . . . . . . . 13B-672
THROTTLE BODY (THROTTLE VALVE AREA)
CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . 13B-677
THROTTLE POSITION SENSOR
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . 13B-677
BASIC IDLE SPEED ADJUSTMENT . . . . . 13B-679
FUEL PRESSURE TEST . . . . . . . . . . . . . . 13B-680
FUEL PUMP CONNECTOR DISCONNECTION
(HOW TO REDUCE PRESSURIZED FUEL
LINES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-682
FUEL PUMP OPERATION CHECK . . . . . . 13B-682
MULTIPORT FUEL INJECTION (MFI) RELAY
CONTINUITY CHECK . . . . . . . . . . . . . . . . . 13B-682
FUEL PUMP RELAY CONTINUITY
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-682
INTAKE AIR TEMPERATURE SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-682
ENGINE COOLANT TEMPERATURE SENSOR
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-682
THROTTLE POSITION SENSOR CHECK . 13B-683
HEATED OXYGEN SENSOR CHECK . . . . 13B-684
INJECTOR CHECK . . . . . . . . . . . . . . . . . . . 13B-686
IDLE AIR CONTROL MOTOR CHECK . . . . 13B-686
EVAPORATIVE EMISSION PURGE SOLENOID
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-686
EGR SOLENOID CHECK . . . . . . . . . . . . . . 13B-686
EVAPORATIVE EMISSION VENTILATION
SOLENOID CHECK . . . . . . . . . . . . . . . . . . 13B-686
VARIABLE INDUCTION CONTROL SOLENOID
CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13B-687
INJECTOR . . . . . . . . . . . . . . . . . . . . . 13B-687
REMOVAL AND INSTALLATION . . . . . . . . 13B-687
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