DTC 12


BHE070201038W05

DTC 12

Ambient temperature sensor system inspection

POSSIBLE CAUSE

• Ambient temperature sensor malfunction
• Open or short circuit in wiring harness between A/C amplifier and ambient temperature sensor

Diagnostic Procedure

STEP

INSPECTION

ACTION

1
• Is the resistance between terminals 2K and 2P of the A/C amplifier connector (16-pin) as indicated below?
– 0.35-120 kilohms
Yes
Inspect the connection at the A/C amplifier connector (16-pin). (See A/C AMPLIFIER INSPECTION [FULL-AUTO AIR CONDITIONER].)
No
Go to the next step.
2
• Inspect the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR INSPECTION.)
• Is it normal?
Yes
Repair the wiring harness.
No
Replace the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION.)