Without Climate Control

DTC Troubleshooting: B1232 (8)

DTC B1232 or DTC indicator 8:

A Short in the Evaporator Temperature Sensor Circuit

1. Clear the DTC with the HDS.

2. Operate the heater-A/C control system in several modes.

3. Check for DTCs using the HDS or the self-diagnostic function.

Is DTC B1232 or 8 indicated?

YES -

Go to step 4.

NO -

Intermittent failure. Check for loose wires or poor connections on the evaporator temperature sensor circuit.�

4. Turn the ignition switch to LOCK (0).

5. Remove the evaporator temperature sensor Service and Repair, and test it Evaporator Temperature Sensor Test.

Is the evaporator temperature sensor OK?

YES -

With the evaporator temperature sensor disconnected, go to step 6.

NO -

Replace the evaporator temperature sensor Service and Repair.�

6. Disconnect the HVAC control unit 30P connector.

7. Check for continuity between body ground and HVAC control unit 30P connector terminal No. 24.





Is there continuity?

YES -

Repair a short to body ground in the wire between the HVAC control unit and the evaporator temperature sensor.�

NO -

Go to step 8.

8. Check for continuity between HVAC control unit 30P connector terminals No. 20 and No. 24.





Is there continuity?

YES -

Repair a short in the wires between the HVAC control unit and the evaporator temperature sensor.�

NO -

Substitute a known-good HVAC control unit HVAC Control Unit Removal/Installation (Without Climate Control), and recheck. If the symptom/indication goes away, replace the original HVAC control unit HVAC Control Unit Removal/Installation (Without Climate Control).�