Code No. B1003: Mode dial SW error

COMMENTS ON TROUBLE SYMPTOM

This code will be set when the air outlet changeover dial position on the AC control panel is detected as abnormal.

PROBABLE CAUSES

Malfunction of the A/C control panel
Damaged the wiring harness or connectors
Malfunction of the A/C-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-120 A/C control panel connector and C-111 A/C-ECU connector

Q. Is the check result normal?

	Go to Step 2.

	Repair the connector.

STEP 2. Check the wiring harness between C-120 A/C control panel connector (terminals 9 and 1) and C-111 A/C-ECU connector (terminals 9 and 10).

Check the AC control panel signal line and earth line for open or short circuit.

Q. Is the check result normal?

	Go to Step 3.

	Repair the wiring harness.

STEP 3. Check whether the diagnosis code is reset

Replace the A/C control panel, and erase the diagnosis code. Then check that no diagnosis code is being set.

Q. Is the diagnosis code set?

	Replace the A/C-ECU.

	This diagnosis is complete.