Pinpoint Test 16: DTC B1239 - Airflow Blend Door Driver Circuit Failure
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PINPOINT TEST 16: DTC B1239 - AIRFLOW BLEND DOOR DRIVER CIRCUIT FAILURE - HYBRID
Normal Operation
When the outside ambient air temperature is cool enough to provide adequate high-voltage battery cooling, the traction battery control module (TBCM) positions the auxiliary air inlet door actuator in the OPEN position. If the outside ambient air temperature is too warm to provide adequate high voltage traction battery (HVTB) cooling, the TBCM positions the auxiliary air inlet door actuator in the CLOSED position and requests A/C cooling. The TBCM sends and receives signals to the auxiliary air inlet door actuator on circuits (GY/L), (L/W) and (G/V), indicating the position of the auxiliary air inlet door. The TBCM controls the movement of the door by controlling power and ground to the auxiliary air inlet door actuator through circuits (L/G) and (Y/G).
- DTC B1239 Airflow Blend Door Driver Circuit Failure - The module senses an open/short on any actuator circuit or no change in actuator feedback voltage when the actuator motor has been energized.
Possible Causes
- Wiring, terminals or connectors
- Auxiliary air inlet mode door actuator
- Broken or binding air inlet door or linkage
- TBCM
Diagnostic Procedure
Step 1-Step 4:
Step 5-Step 7:
Step 8-Step 10:
