C1628

Code No. C1628: Abnormal Electronic Control Solenoid (center) Current














OPERATION

The AWC-ECU monitors the current value of the electronic control coupling solenoid (center).

DIAGNOSTIC TROUBLE CODE SET CONDITIONS

This diagnostic trouble code is set when the abnormality below is detected:

- By the monitored electronic control solenoid (center) current, the AWC-ECU judges the undercurrent failure.

- By the monitored electronic control solenoid (center) current, the AWC-ECU judges the overcurrent failure.

- The AWC-ECU judges the monitor circuit failure.

PROBABLE CAUSES

- Malfunction of electronic control coupling solenoid (center)

- Damaged harness wires and connectors

- Malfunction of AWC-ECU

DIAGNOSTIC PROCEDURE

STEP 1. Electronic control coupling solenoid (center) connector, intermediate connector, AWC-ECU connector check: D-138, C-138, D-113, C-139

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the defective connector. Then go to Step 6.
STEP 2. Check the wiring harness between D-138 electronic control coupling solenoid (center) connector terminal No.2 and C-139 AWC-ECU connector terminal No.2.

Check the power supply line for open or short circuit.

Q. Is the check result normal?

YES Go to Step 3.
NO Repair the wiring harness. Then go to Step 6.
STEP 3. Check the wiring harness between D-138 electronic control coupling solenoid (center) connector terminal No.1 and C-139 AWC-ECU connector terminal No.3.

Check the ground line for open or short circuit.

Q. Is the check result normal?

YES Go to Step 4.
NO Repair the wiring harness. Then go to Step 6.
STEP 4. Check of the electronic control coupling solenoid (center)

Electronic Control Coupling Inspection [Electronic Control 4WD].

Q. Is the check result normal?

YES Go to Step 5.
NO Replace the electronic control coupling (center) Service and Repair). Then go to Step 6.
STEP 5. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.C1628 set?

YES Replace the AWC-ECU. (Refer to AWC-ECU Removal and Installation). Then go to Step 6.
NO Intermittent malfunction. How to Cope With Intermittent Malfunctions).
STEP 6. Check whether the diagnostic trouble code is reset.

Q. Is diagnostic trouble code No.C1628 set?

YES Return to Step 1.
NO This diagnosis is complete.