C1254

DTC C1254: 2WD/4WD Switch Malfunction

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

1) Clear DTC using scan tool.
2) Select 2WD/4WD switch to "2WD" position and keep its position for 10 seconds. Similarly select 2WD/4WD switch to "AUTO" and "LOCK" position.
3) Check DTC.

Troubleshooting



1.
Was "4WD control system check" performed?
YES
Go to Step 2.
NO
Go to 4WD Control System Check.

2. 2WD/4WD switch circuit check

Disconnect 2WD/4WD switch connector "L174" with ignition switch turned OFF.
Check for proper connection to "L174-1" and "L174-5" terminals of 2WD/4WD switch connector.
If connection is OK, measure voltage between "L174-1" terminal or "L174-5" terminal of 2WD/4WD switch connector and vehicle body ground.

Is it 10 - 14 V?
YES
Go to Step 3.
NO
Go to Step 5.

3. 2WD/4WD switch ground circuit check

Measure resistance between "L174-4" terminal of 2WD/4WD switch connector and vehicle body ground with ignition switch turned OFF.

Is resistance below 5 ohms?
YES
Go to Step 4.
NO
"BLK/ORN" wire is shorted to ground.

4. 2WD/4WD switch check

Check 2WD/4WD switch referring to 2WD/4WD Switch Inspection.

Is it in good condition?
YES
Substitute a known-good 4WD control module and recheck.
NO
Replace 2WD/4WD switch.

5. 2WD/4WD switch circuit check

Disconnect connector from 4WD control module connector "G26" with ignition switch turned OFF.
Check for shorted to ground in related circuits.
- Between "G26-13" terminal of 4WD control module connector and "L174-5" terminal of 2WD/4WD switch connector.
- Between "G26-14" terminal of 4WD control module connector and "L174-1" terminal of 2WD/4WD switch connector.

Are they in good condition?
YES
Substitute a known-good 4WD control module and recheck.
NO
Repair circuit.