Table of Contents
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G E N E R A L DIAGNOSIS
INDEX
Page
Circuit Actuate Test Display
40
Circuit Actuation Test Mode
40
Fault Code Description
36
Ignition Timing Procedure
. . . . . . . . . . . . . . . . . .
41
Obtaining Circuit Actuation Test
40
Obtaining Sensor Read Test Mode
41
Obtaining Switch Test Mode
40
VISUAL INSPECTION
A v i s u a l inspection for loose, disconnected, or incor-
rectly routed wires a n d hoses should be made before
a t t e m p t i n g t o diagnose or service t h e fuel injection
system. A v i s u a l check w i l l help spot these faults
and save unnecessary test a n d diagnostic t i m e . A
Page
On Board Diagnostics
3 6
Sensor Read Test Mode .
41
Sensor Test Mode
4 1
Switch Test Mode
. 4 0
Systems Test
4 0
Visual Inspection
31
thorough v i s u a l inspection o f the F u e l Injection Sys-
t e m (Fig. 1) w i l l include the f o l l o w i n g checks:
(1) V e r i f y t h a t t h e 60-way connector i s f u l l y i n -
serted i n t o t h e socket o n t h e Single Board E n g i n e
Controller (SBEC) (Fig. 2).
(2) V e r i f y t h a t hoses are securely attached t o vapor
canister (Fig. 3).
(3) V e r i f y t h a t a l t e r n a t o r electrical w i r i n g a n d t h e
drive belt are correctly installed.
BOARD SINGLE
ENGINE
CONTROLLER
(SBEC)
DIAGNOSTIC
TOOL
THROTTLE
POSITION
SENSOR
NEUTRAL
SAFETY SWITCH
DISTANCE
SENSOR
CHECK ENGINE
LAMP
LOCK-UP TORQUE CONVERTER
SOLENOID
HEATED
OXYGEN SENSOR
COOLANT
TEMPERATURE
SENSOR
'MANIFOLD
ABSOLUTE
PRESSURE
SENSOR
IGNITION
REFERENCE
PICK-UP
DISTRIBUTOR
A/C ELECTRONIC
CYCLING CLUTCH
SWITCH
I
A/C LOW
PRESSURE CUTOFF
SWITCH
A/C CUTOUT
RELAY
AUTO SHUT-
DOWN RELAY
PART THROTTLE
UNLOCK RELAY
IDLE SPEED CONTROL
(ISQ ACTUATOR
t
EGR, AIR SWITCHING AND
CANISTER PURGE SOLENOIDS
THROTTLE
BODY
TEMPERATURE
SENSOR
5.2LAND5.9L
ENGINES
ONLY
FUEL
INJECTORS
IGNITION COIL
IN-TANK PUMP
ALTERNATOR
SHIFT
INDICATOR
LAMP
J9014-170
Fig. 1 Dual-Point Fuel Injection Components
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