C145A-AWD CLUTCH RETURN 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 AWD Module detects the Rear Differential Solenoid Supply is shorted low.

Possible Causes

(T78) SOLENOID SUPPLY VOLTAGE OPEN

(T78) SOLENOID SUPPLY VOLTAGE SHORTED TO GROUND

(T312) REAR DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

(T312) REAR DIFFERENTIAL SOLENOID CONTROL CIRCUIT OPEN

(AWD) CONTROL MODULE

ELECTRONIC CONTROLLED CLUTCH (ECC)

Diagnostic Test

1.ACTIVE DTC

Is the DTC active at this time?

Yes

Go To 2

Go To10

2.ECC SOLENOID OPERATION

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

Yes

Go To7

Go To 3

3.(T78) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT SHORTED TO GROUND

Is the resistance below 100 ohms?

Yes

Repair the short to ground in the (T78) Solenoid Supply Voltage circuit.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

Go To 4

4.(T78) SWITCHED BATTERY SOLENOID SUPPLY CIRCUIT OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 5

Repair the open in the (T78) Solenoid Supply Voltage circuit.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

5.(T312) REAR DIFFERENTIAL SOLENOID CONTROL CIRCUIT SHORTED TO GROUND

Is the resistance below 100 ohms?

Yes

Repair the short to ground in the (T312) Rear Differential Solenoid Control circuit.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

Go To 6

6.(T312) REAR DIFFERENTIAL SOLENOID CONTROL CIRCUIT OPEN

Is the resistance below 5.0 ohms?

Yes

Go To 7

Repair the open in the (T312) Rear Differential Solenoid Control circuit.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

Is the resistance below 100 ohms?

Yes

Repair the short to ground in the (T312) Rear Differential Solenoid Control circuit.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

Go To 8

8.AWD CONTROL MODULE

NOTE: Before continuing, check the AWD Control Module harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Were there any problems found?

Yes

Repair as necessary.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

Replace AWD Control Module in accordance with Service Information.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

9.ELECTRONICALLY CONTROLLED CLUTCH (ECC)

NOTE: Before continuing, check the ECC Solenoid jumper harness connector terminals for corrosion, damage, or terminals push out, repair/replace as necessary.

Were there any problems found?

Yes

Repair as necessary.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

Replace ECC in accordance with Service Information.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

10.INTERMITTENT WIRING AND CONNECTORS

Were there any problems found?

Yes

Repair as necessary.
Perform AWD Control Module VERIFICATION TEST. (Refer to 3 - DIFFERENTIAL & DRIVELINE/ELECTRONICALLY CONTROLLED CLUTCH - STANDARD PROCEDURE)

Test Complete.