Code No.B10C0: Interior temperature sensor system (short circuit)
Code No.B10C1: Interior temperature sensor system (open circuit)


COMMENTS ON TROUBLE SYMPTOM
This code is set when the interior temperature sensor circuit is short (Code No.B10C0) or is open (Code No.B10C1)

PROBABLE CAUSES

  • Malfunction of the interior temperature sensor
  • Damaged the wiring harness or connectors
  • Malfunction of the heater controller assembly (A/C-ECU)

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list
Check that the following service data display contents are normal. (Refer to ).
Item No.63: Interior temperature sensor

Q. Is the check result normal?
Go to Step 4.
Go to Step 2.

STEP 2. Check of open and short circuit in SENG and INC line between interior temperature sensor and heater controller assembly (A/C-ECU) connector.
note Prior to the wiring harness inspection, check joint connector and repair if necessary.

Q. Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.

STEP 3. Check the interior temperature sensor.
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 heater controller assembly (A/C-ECU).
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).