Diagnosis code 15, 16: Heater water temperature sensor system
COMMENTS ON TROUBLE SYMPTOM
This code is set when the heater water temperature sensor circuit is open (Code No.15) or is short (Code No.16).POSSIBLE CAUSES
- Malfunction of the heater water temperature sensor
- Damaged the wiring harness or connectors
- Malfunction of the automatic air conditioner control panel (A/C-ECU)
DIAGNOSIS
Step 3. Check the wiring harness between C-27 A/C-ECU connector (terminals 4 and 20) and C-314 heater water temperature sensor connector (terminals 2 and 1).
NOTE: Prior to the wiring harness inspection, check intermediate connector C-36, and repair if necessary.
- Check the input line 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.