Diagnosis code 42: Mode selection damper control motor and potentiometer activating system
COMMENTS ON TROUBLE SYMPTOM
This code is set when the mode selection damper cannot be rotated to the preset opening angle.POSSIBLE CAUSES
- Malfunction of the mode selection damper control motor and potentiometer
- Malfunction of the automatic air conditioner control panel (A/C-ECU)
- Damaged the wiring harness or connectors
DIAGNOSIS
Step 3. Check the wiring harness between C-26 A/C-ECU connector (terminals 21 and 24) and C-315 mode selection damper control motor and potentiometer connector (terminals 3 and 1).
NOTE: Prior to the wiring harness inspection, check intermediate connector C-36, and repair if necessary.
- Check the output lines for open or short circuit.
Q: Is the check result normal?
YES:
Replace the automatic air conditioner control panel (A/C-ECU)NO: Repair the wiring harness.