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 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 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.