DTC Troubleshooting: B1232 (0A)
DTC B1232 or DTC indicator 0A: A Short in the Evaporator Temperature Sensor Circuit
DTC Description
DTC
B1232 A Short in the Evaporator Temperature Sensor Circuit
  

1.
Problem verification:

Problem verification
?1.
Clear the DTC with the HDS.


?2.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

?3.
Do the Self-Diagnostic Function with the HDS or the climate control unit.

?4.
Check for DTCs.
DTC Description
DTC
B1232 A Short in the Evaporator Temperature Sensor Circuit
  

Is DTC B1232 or 0A indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure. Check for loose wires or poor connections on the evaporator temperature sensor circuit.?
2.
Shorted wire check (TEVA line):

Shorted wire check (TEVA line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
Climate control unit 32P connector
Evaporator temperature sensor 2P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit 32P connector: disconnected
Evaporator temperature sensor 2P connector: disconnected
Test point 1
Climate control unit 32P connector No. 18
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
Repair a short to ground in the wire between the climate control unit and the evaporator temperature sensor.?
     
NO
     
     
     
The TEVA wire is not shorted. Go to step 3.
3.
Shorted wire check (TEVA line to SENSOR COM line):

Shorted wire check (TEVA line to SENSOR COM line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Climate control unit 32P connector: disconnected
Evaporator temperature sensor 2P connector: disconnected
Test point 1
Climate control unit 32P connector No. 18
Test point 2
Climate control unit 32P connector No. 30

Is there continuity?

     
YES
     
     
     
Repair a short in the wires between the climate control unit and the evaporator temperature sensor.?
     
NO
     
     
     
The TEVA wire to SENSOR COM wire are OK. Go to step 4.
4.
Evaporator temperature sensor check:

Evaporator temperature sensor check
?1.
Test the evaporator temperature sensor.

Is the evaporator temperature sensor OK?

     
YES
     
     
     
     
NO