C1417-FRONT DIFFERENTIAL CONTROL CIRCUIT LOW





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 shorted low.


Possible Causes
  
FRONT DIFFERENTIAL SOLENOID
  
(T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO GROUND
  
(T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT OPEN
  
(T301) SWITCHED BATTERY SOLENIOD SUPPLY OPEN/SHORTED TO GROUND
  
FINAL DRIVE CONTROL MODULE (FDCM)
  



Diagnostic Test

1.ACTIVE DTC




Is the DTC active at this time?

Yes
  • Go To 2


No
  • Go To8

2.FRONT DIFFERENTIAL SOLENOID OPERATION










Does the test light illuminate brightly and flash on and off?

Yes
  • Inspect the Front Differential Solenoid Jumper harness, repair/replace as necessary. If OK, replace the Front Differential Solenoid.
  • Perform FDCM VERIFICATION TEST.


No
  • Go To 3

3.







Is the resistance below 100 ohms?

Yes
  • Repair the short to ground in the Front Differential Solenoid Control circuit.
  • Perform FDCM VERIFICATION TEST.


No
  • Go To 4

4.(T306) FRONT DIFFERENTIAL SOLENOID CONTROL CIRCUIT OPEN





Is the resistance below 5.0 ohms?

Yes
  • Go To 5


No
  • Repair the open in the (T306) Front Differential Solenoid Control circuit.
  • Perform FDCM VERIFICATION TEST

5.





Is the resistance below 100 ohms?

Yes
  • Repair the short to ground in the (T301) Switched Battery Solenoid Supply circuit.
  • Perform FDCM VERIFICATION TEST.


No
  • Go To 6

6.(T301) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT OPEN





Is the resistance below 5.0 ohms?

Yes
  • Go To 7


No
  • Repair the open in the (T301) Switched Battery Solenoid Supply circuit.
  • Perform FDCM VERIFICATION TEST
  • Go To 7

7.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.

8.INTERMITTENT WIRING AND CONNECTORS






Were there any problems found?

Yes
  • Repair as necessary.
  • Perform FDCM VERIFICATION TEST.


No
  • Test Complete.