C1418-FRONT DIFFERENTIAL CONTROL CIRCUIT HIGH
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
The Solenoid is active, no solenoid supply circuit DTCs are present and battery voltage is normal.
- Set Condition:
The FDCM detects the Front Differential Solenoid Control is high.
| Possible Causes |
| FRONT DIFFERENTIAL SOLENOID |
| (T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE |
| (T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO (T301) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT |
| FINAL DRIVE CONTROL MODULE (FDCM) |
Diagnostic Test
1.ACTIVE DTCIs the DTC active at this time?
Yes
- Go To 2
No
- Go To6
2.FRONT DIFFERENTIAL SOLENOID OPERATION
Does the test light flash on and off?
Yes
- Inspect the Front Differential Solenoid Jumper harness connector, repair/replace as necessary. If OK, replace the Front Differential Solenoid.
- Perform FDCM VERIFICATION TEST.
No
- Go To 3
3.
Does the voltmeter indicate voltage present?
Yes
- Repair the short to voltage in the (T306) Front Differential Solenoid Control circuit.
- Perform FDCM VERIFICATION TEST.
No
- Go To 4
4.(T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO (T301) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT
Is the resistance below 100 ohms?
Yes
- Repair the short between the (T306) Front Differential Solenoid Control circuit and the (T301) Switched Battery Solenoid Supply circuit.
- Perform FDCM VERIFICATION TEST
No
- Go To 5
5.FDCM
NOTE: Before continuing, check the FDCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
Were there any problems found?
Yes
- Repair as necessary.
- Perform FDCM VERIFICATION TEST
No
- Replace and program the Final Drive Control Module in accordance with Service Information.
- Perform FDCM VERIFICATION TEST.
6.INTERMITTENT WIRING AND CONNECTORS
Were there any problems found?
Yes
- Repair as necessary.
- Perform FDCM VERIFICATION TEST.
No
- Test Complete.