DTC C1254: 2WD/4WD Switch Malfunction: Troubleshooting
C1254: SYMPTOM TROUBLESHOOTING REFERENCE CHART
| Step |
Action |
YES |
NO |
| 1 |
Was "4WD control system check" performed? |
Go to Step 2. |
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? |
Go to Step 3. |
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 Ω? |
Go to Step 4. |
"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? |
Substitute a known-good 4WD control module and recheck. |
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? |
Substitute a known-good 4WD control module and recheck. |
Repair circuit. |