Code No.B1045: Motor drive system for the air mixing damper

DIAGNOSIS CODE SET CONDITION

This code is set when the air mixing damper cannot be rotated to the preset opening angle.

POSSIBLE CAUSES

Malfunction of the air mixing damper control motor and potentiometer
Malfunction of the automatic A/C control panel (A/C-ECU)
Damaged the wiring harness or connectors

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-09 A/C-ECU connector and C-49 air mixing damper control motor and potentiometer connector

Q. Is the check result normal?

Go to Step 2.

Repair the connector.

STEP 2. Check the wiring harness between C-09 A/C-ECU connector (terminals 12 and 1) and C-49 air mixing damper control motor and potentiometer connector (terminals 1 and 3).

Check the motor activating lines for open or short circuit.

Q. Is the check result normal?

Go to Step 3.

Repair the wiring harness.

STEP 3. Check the air mixing damper control motor and potentiometer.

Refer to

.

Q. Is the check result normal?

	Go to Step 4.

	Replace the air mixing damper control motor and potentiometer.

STEP 4. Check whether the diagnosis code is reset.

Q. Is the diagnosis code set?

	Replace the automatic A/C control panel (A/C-ECU).

	The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).