DTC B1238 (45): A Problem in the Passenger's Air Mix Control Motor Circuit, Linkage, Door, or Motor
| DTC Description | DTC |
|---|---|
| B1238 A problem in the passenger's air mix control motor circuit, linkage, door, or motor |
- 1. Problem verification:
1. Clear the DTCs 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 - Refer to: How to Troubleshoot the Body ElectricalHow to Troubleshoot the Climate Control System .
4. Check for DTCs.
DTC Description DTC B1238 A problem in the passenger's air mix control motor circuit, linkage, door, or motor Is DTC B1238 or 45 indicated?
YES
Go to step 2.
NO
Intermittent failure. Check for loose wires or poor connections on the passenger's air mix control motor circuit.
- 2. Open wire check (M-HOT AS line):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the following connectors.
Climate control unit 32P connector Passenger's air mix control motor 7P connector 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Passenger's air mix control motor 7P connector: disconnected Test point 1 Climate control unit 32P connector No. 29 Test point 2 Passenger's air mix control motor 7P connector No. 6 Is there continuity?
YES
The M-HOT AS wire is not open. Go to step 3.
NO
Repair an open in the wire between the climate control unit and the passenger's air mix control motor.
- 3. Open wire check (M-COOL AS line):
1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Passenger's air mix control motor 7P connector: disconnected Test point 1 Climate control unit 32P connector No. 30 Test point 2 Passenger's air mix control motor 7P connector No. 7 Is there continuity?
YES
The M-COOL AS wire is not open. Go to step 4.
NO
Repair an open in the wire between the climate control unit and the passenger's air mix control motor.
- 4. Shorted wire check (M-HOT AS line):
1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Passenger's air mix control motor 7P connector: disconnected Test point 1 Climate control unit 32P connector No. 29 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire between the climate control unit and the passenger's air mix control motor.
NO
The M-HOT AS wire is OK. Go to step 5.
- 5. Shorted wire check (M-COOL AS line):
1. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Climate control unit 32P connector: disconnected Passenger's air mix control motor 7P connector: disconnected Test point 1 Climate control unit 32P connector No. 30 Test point 2 Body ground Is there continuity?
YES
Repair a short to ground in the wire between the climate control unit and the passenger's air mix control motor.
NO
The M-COOL AS wire is OK. Go to step 6.
- 6. Passenger's air mix control motor check:
1. Test the passenger's air mix control motor - Refer to: Passenger's Air Mix Control Motor TestAir Mix Control Motor Test .
Is the passenger's air mix control motor OK?
YES
Replace the climate control unit .
NO
Replace the passenger's air mix control motor - Refer to: Passenger's Air Mix Control Motor Removal and InstallationAir Mix Control Motor Removal and Installation , or repair the passenger's air mix control linkage or door.
