DTC B1282, B1283

B3E070201038W07

DTC B1282, B1283

Air mix actuator (potentiometer) system

POSSIBLE CAUSE

• Air mix actuator malfunction
• Open circuit in wiring harness between climate control unit and air mix actuator
• Short circuit in wiring harness between climate control unit (terminal N) and air mix actuator (terminal C)

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
• Inspect the air mix actuator. (See AIR MIX ACTUATOR INSPECTION.)
• Is it normal?
Yes
Go to the next step.
No
Replace the air mix actuator. (See AIR MIX ACTUATOR REMOVAL/INSTALLATION.)
2
• Disconnect the climate control unit connector and the air mix actuator connector.
• Is there an open circuit in the wiring harness between the following terminals of the climate control unit and the air mix actuator?
- P-A
- N-C
- U-B
Yes
Repair the wiring harness.
No
Go to the next step.
3
• Is there a short circuit to ground in the wiring harness between climate control unit terminal N and air mix actuator terminal C?
Yes
Repair the wiring harness.
No
The system is normal at present. (Clear the past malfunction from the memory.)