Heating and Air Conditioning
DTC B1232 or DTC indicator 8: A Short in the Evaporator Temperature Sensor Circuit1. Clear the DTC by turning the ignition switch OFF, and then ON (II).
2. Operate the A/C control system in several modes.
3. Check for DTCs using the HDS or self-diagnostic.
Is DTC B1232 or 8 indicated?
YES - Go to step 4.
NO - Intermittent failure.
4. Turn the ignition switch OFF.
5. Remove the evaporator temperature sensor and test it.
Does the evaporator temperature sensor test OK?
YES - Go to step 6.
NO - Replace the evaporator temperature sensor.
6. Disconnect A/C control panel connector A (22P).
7. Check for continuity between the No. 14 terminal of A/C control panel connector A (22P) and body ground.
Is there continuity?
YES - Repair short to body ground in the wire between the A/C control panel and the evaporator temperature sensor.
NO - Go to step 8.
8. Check for continuity between the No. 14 terminal and the No. 3 terminal of A/C control panel connector A (22P).
Is there continuity?
YES - Repair short in the wires between the A/C control panel and the evaporator temperature sensor.
NO - Substitute a known-good A/C control panel, and recheck. If the symptom/indication goes away, replace the original A/C control panel.