Inspection Procedure
2: The Switch Position of the Drive Mode Selector does not Match with the Indicator Display
in the Combination Meter.
DRIVE MODE SELECTOR POSITION AND INDICATOR DISPLAY (NORMAL)
Switch position
Indicator display
2WD
-(Not illuminated)
4WD
4WD
LOCK
4WD, LOCK
COMMENTS ON TROUBLE SYMPTOM
If the drive mode selector switch position and indicator display in the
combination meter do not match, the drive mode selector, wiring harness connector between 4WD-ECU
and drive mode selector, wiring harness connector in the earth circuit for the drive mode selector,
or 4WD-ECU may have a problem.
If high-pressure type spare tyres are equipped, tyre pressure is excessively out
of the specified value, or tyres with different sizes or different brands are equipped, 4WD
mode may be temporarily displayed even when the LOCK mode is selected.
PROBABLE CAUSES
Damaged wiring harness and connectors
Malfunction of drive mode selector
4WD-ECU malfunction
High-pressure type spare tyres are equipped, tyre pressure is excessively out of
the specified value, or tyres with different sizes or different brands are equipped
DIAGNOSIS PROCEDURE
note
Be sure to ask the user if any of the probable causes is applicable before performing
the diagnosis procedure.
STEP 1. Check the following connector:
Check the C-25 drive mode selector connector and C-130 4WD-ECU connector for improper
engagement, terminal damage or terminal drawn in the connector case.
Q.
Are the connectors and terminals in good condition?
Go to Step 2.
Repair the connector(s) or terminal(s). Then go to Step 9.
STEP 2. Resistance measurement between the drive mode selector connector
terminals
(1)Remove the drive mode selector (Refer .)
(2)Measure the resistance between the following terminals.
Switch position
Terminal number
Normal conditions
2WD
1 -
2
Continuity exists (2 Ω
or less).
4WD
-
No continuity
LOCK
2 -
3
Continuity exists (2 Ω
or less).
Q.
Is the check result normal?
Go to Step 3.
Replace the drive mode selector. Then go to Step 9.
STEP 3. Wiring harness check
Wiring harness between the C-130 4WD-ECU connector (terminal
No. 16) and the C-25 drive mode selector connector (terminal No. 3)
Wiring harness between the C-130 4WD-ECU connector (terminal No. 14) and the C-25
drive mode selector connector (terminal No. 1)
Check the wiring harness above for damage or other problem.
Q.
Is the wiring harness in good condition?
Go to Step 4.
Repair the wiring harness. Then go to Step 9.
STEP 4. Resistance measurement at the drive mode selector connector
(1)Disconnect the C-25 drive mode selector connector.
(2)Measure the resistance between the C-25 wiring harness side connector terminal
No. 2 and the body earth. OK: 2 Ω
or less
Q.
Is the check result normal?
Go to Step 8.
Go to Step 5.
STEP 5. Wiring harness check
note
Prior to the wiring harness inspection, check the C-36 joint connector, and repair if necessary.
Check the wiring harness between the C-25 drive mode selector connector (terminal No.
2) and the body earth (No. 4 and No. 16) for damage or other problem.
Q.
Is the wiring harness in good condition?
Go to Step 6.
Repair the wiring harness. Then go to Step 9.
STEP 6. Check the following connector:
Check the connectors below for improper engagement, terminal damage or terminal drawn
in the connector case.
C-130 4WD-ECU connector
C-313, C-317 ETACS-ECU connector
Q.
Are the connectors and terminals in good condition?
Go to Step 7.
Repair the connector(s) or terminal(s). Then go to Step 9.
STEP 7. Wiring harness check
Check the wiring harness between the C-130 4WD-ECU connector and the C-313 ETACS-ECU connector
for damage or other problem.
Q.
Is the wiring harness in good condition?
Go to Step 8.
Repair damage or other problem in the wiring harness. Then go to Step 9.
STEP 8. Retest the system.
Q.
Does the malfunction occur again?
Replace 4WD-ECU. (Refer to .) Then go to Step
9.
The trouble can be an intermittent malfunction. (Refer to GROUP 00 -
How
to Cope with Intermittent Malfunction .)
STEP 9. Check whether the diagnosis code is reset.
)
)
)
)
)
Go to Step 2.
Repair the connector(s) or terminal(s). Then go to Step 9.
.)