Section 05 ELECTRICAL
Subsection 06 (ELECTRIC SHIFT SYSTEM)
05-06-13
VALVES/SOLENOIDS TESTS
CLUTCHING VALVE AND CLUTCH
MODULATOR VALVE TESTS
CAUTION: It is recommended to always dis-
connect the battery when replacing any electric
or electronic part(s).
Always place the transmission on NEUTRAL posi-
tion and select FIRST gear.
Place vehicle on level surface.
Install vehicle on jack stands to raise all four tires
off the ground.
Unplug clutching and clutch modulator valve con-
nector.
Plug tester (P/N 529 035 653).
Start engine.
Place transmission on HI or LO position and select
SECOND or THIRD gear to permit upshift and
downshift selection.
Rev engine (about 2500 RPM) and push upshift
button.
If RED and BLUE indicator lights blink when button
is pushed, clutching valve and clutch modulator
valve are operational.
If RED indicator light blinks when button is
pushed, clutching valve is operational and clutch
modulator valve can be defective. Check the fol-
lowing details:
– Check wiring condition of clutch modulator valve.
– Check upshift/downshift switch, refer to UPSHIFT/
DOWNSHIFT BUTTON TESTS section.
– Install a new clutch modulator valve. Refer to
VALVES REMOVAL/INSTALLATION section.
– Check AMP connectors on MPEM. Refer to
OVERVIEW 05-02.
– Install a new MPEM. Refer to INSTRUMENTS
AND ACCESSORIES 05-07.
If BLUE indicator light blinks when button is pushed,
clutch modulator valve is operational and clutching
valve can be defective. Check the following details:
– Check wiring condition from clutching valve.
– Check upshift/downshift switch, refer to UPSHIFT/
DOWNSHIFT BUTTON TESTS section.
– Install a new clutching valve. Refer to VALVES
REMOVAL/INSTALLATION section.
– Check AMP connectors on MPEM. Refer to
OVERVIEW 05-02.
– Install a new MPEM. Refer to INSTRUMENTS
AND ACCESSORIES 05-07.
If no indicator light blinks when button is pushed:
– Check fuse.
– Check wiring condition.
– Check upshift/downshift switch, refer to UPSHIFT/
DOWNSHIFT BUTTON TESTS section.
– Install a new clutching valve and a new clutch
modulator valve. Refer to VALVES REMOVAL/
INSTALLATION section.
– Check AMP connectors on MPEM. Refer to
OVERVIEW 05-02.
– Install a new MPEM. Refer to INSTRUMENTS
AND ACCESSORIES 05-07.
UPSHIFT/DOWNSHIFT
SOLENOIDS TESTS
Unplug shifting valve connector.
Connect tester.
Start engine.
Place transmission on NEUTRAL position and se-
lect SECOND or THIRD gear.
Push upshift/downshift button.
If RED and BLUE indicator light blink when button
is pushed, the solenoids are good.
If RED or BLUE indicator light doesn’t blink when
button is pushed:
– Check wiring condition.
– Check upshift/downshift switch, refer to UPSHIFT/
DOWNSHIFT BUTTON TESTS section.
– Install a new shifting valve, refer to VALVES
REMOVAL/INSTALLATION section.
– Check AMP connectors on MPEM. Refer to
OVERVIEW 05-02.
– Install a new MPEM. Refer to INSTRUMENTS
AND ACCESSORIES 05-07.
If no indicator light blinks when button is pushed
on upshift or downshift position:
– Check fuse.
m
WARNING
Apply parking device.
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