Subsection 13 (GEARBOX AND 4X4 COUPLING UNIT (WITH GBPS))
GEAR INDICATION FAILS
1.
Defective gearbox position sensor (GBPS).
- Perform a gearbox position sensor test.
- Damaged wires. Repair as required.
GEAR(S) IS (ARE) HARD TO SHIFT
1.
Incorrect shift rod adjustment.
- Adjust shift rod (refer to SHIFT ROD in SHIFTER
subsection.
4 WHEEL DRIVE INDICATION FAILS
1.
4WD indicator switch failure.
- Test 4WD indicator switch. Replace as required.
- Bad contact. Check for corrosion or loose con-
nector.
- Damaged wires. Repair as required.
4 WHEEL DRIVE DOES NOT ENGAGE OR
DISENGAGE
1.
Defective 4WD switch.
- Check 4WD switch operation.
2.
Defective actuator.
- Test actuator.
3.
Damaged or worn shifting fork or sleeve.
- Remove actuator and inspect shifting fork and
sleeve.
PROCEDURES
VEHICLE SPEED SENSOR (VSS)
VSS Location
The vehicle speed sensor is located on the right
housing of the gearbox, behind the actuator.
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1. Right housing of gearbox
2. Actuator
3. VSS (Vehicle Speed Sensor)
The VSS connector is located between the cylin-
ders, behind the OPS cover.
VSS Access
To reach the VSS, refer to
BODY
subsection and
remove the RH engine cover
To reach the VSS connector, remove the OPS
cover.
VSS Wire Identification
FUNCTION
PIN
COLOR -
SENSOR
CONNECTOR
COLOR -
WIRING
HARNESS
CONNECTOR
12-volt
input from
fuse F5
A
RED
VIOLET/BLUE
Speed
signal
(to cluster
pin 9)
B
WHITE
PINK
Ground
(to ECM C3)
C
BLACK
GREEN/
BROWN
VSS Circuit Protection
CONDITION
CIRCUIT PROTECTION
Supplied with main
relay activated
Fuse 5 of fuse block 1
(from main relay R2)
Testing the VSS Input Voltage
1. Set multimeter to Vdc.
REQUIRED TOOL
FLUKE 115 MULTIMETER (P/N 529 035 868)
2. Turn ignition switch ON.
3. Set emergency engine stop switch to RUN.
4. Back-probe the VSS connector.
REQUIRED TOOL
FLUKE RIGID BACK-PROBE (P/N TP88)
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