Code No. C1626: Actuator Power Supply Voltage Malfunction

OPERATION

The AWC-ECU monitors the actuator power supply voltage.

DIAGNOSIS CODE SET CONDITIONS

The AWC-ECU monitors the actuator power supply voltage of immediately after the ignition is turned ON and when the abnormality of the actuator power supply voltage is detected, this diagnosis code is set.

PROBABLE CAUSES

Malfunction of electronic control coupling solenoid (Centre)
Malfunction of electronic control coupling solenoid (Front)
Damaged harness wires and connectors
Malfunction of AWC-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check of short to power supply in FSL+ line between electronic control coupling solenoid (front) connector and AWC-ECU connector.

Q. Is the check result normal?

	Go to Step 2.

	Repair the connector(s) or wiring harness. Then go to Step 8.

STEP 2. Check of short to power supply in FSL- line between electronic control coupling solenoid (front) connector and AWC-ECU connector.

Q. Is the check result normal?

	Go to Step 3.

	Repair the connector(s) or wiring harness. Then go to Step 8.

STEP 3. Check of the electronic control coupling solenoid (Front)

Refer to

Q. Is the check result normal?

	Go to Step 4.

	Replace the transfer assembly (Refer to ). Then go to Step 8.

STEP 4. Check of short to power supply in SOL+ line between electronic control coupling solenoid (Centre) connector and AWC-ECU connector.

Q. Is the check result normal?

	Go to Step 5.

	Repair the connector(s) or wiring harness. Then go to Step 8.

STEP 5. Check of short to power supply in SOL- line between electronic control coupling solenoid (Centre) connector and AWC-ECU connector.

Q. Is the check result normal?

	Go to Step 6.

	Repair the connector(s) or wiring harness. Then go to Step 8.

STEP 6. Check of the electronic control coupling solenoid (Centre)

Refer to GROUP 27C - On-vehicle Service.

Q. Is the check result normal?

	Go to Step 7.

	Replace the electronic control coupling (Centre) (Refer to GROUP 27C - Electronic Control Coupling). Then go to Step 8.

STEP 7. Check whether the diagnosis code is set again.

Q. Is diagnosis code No.C1626 set?

	Replace the AWC-ECU. (Refer to ). Then go to Step 8.

	Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction).

STEP 8. Check whether the diagnosis code is set again.

Q. Is diagnosis code No.C1626 set?

	Return to Step 1.

	This diagnosis is complete.