Code No. B1031,B1032: A/C pressure sensor system


<LHD>

<RHD>









COMMENTS ON TROUBLE SYMPTOM
This code is set when the A/C pressure sensor circuit is short (Code No.B1031) or is open (Code No.B1032).

PROBABLE CAUSES

  • Malfunction of the A/C pressure sensor
  • Damaged the wiring harness or connectors
  • Malfunction of the A/C-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: D-08 A/C-ECU connector and A-27 A/C pressure sensor connector

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

STEP 2. Check the wiring harness between D-08 A/C-ECU connector (terminals 8, 24 and 30) and A-27 A/C pressure sensor connector (terminals 3, 2 and 1).
note Prior to the wiring harness inspection, check intermediate connector D-241 and joint connector A-16 <RHD>, and repair if necessary.

  • Check the sensor 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 the A/C pressure sensor.
Refer to .

Q. Is the check result normal?
Go to Step 4.
Replace the A/C pressure sensor.

STEP 4. M.U.T.-III diagnosis code

Q. Is the diagnosis code set?
Replace the A/C-ECU.
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to Cope with Intermittent Malfunction ).