DTC 13


BHE070201038W13

DTC 13

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
• Inspect the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR INSPECTION.)
• Is it normal?
Yes
Go to the next step.
No
Replace the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION.)
2
• Disconnect the A/C amplifier connector (16-pin) and the ambient temperature sensor connector.
• Is there an open circuit in the wiring harness between the following terminals of the A/C amplifier connector (16-pin) and the ambient temperature sensor connector?
– 2K-B
– 2P-A
Yes
Repair the wiring harness.
No
Go to the next step.
3
• Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2K and ambient temperature sensor connector terminal B?
Yes
Repair the wiring harness.
No
Connect the A/C amplifier connector (16-pin), then go to the next step.
4
• Turn the ignition switch to the ON position.
• Inspect the voltage at the following A/C amplifier terminal (wiring harness side).
– Terminal 2K (16-pin, ambient temperature sensor input signal)
• Is the voltage normal? (Approx. 5 V)
Yes
The system is normal at present. (Clear the past malfunction from memory.)
No
Inspect the connection at the A/C amplifier connector (16-pin). (See A/C AMPLIFIER INSPECTION [FULL-AUTO AIR CONDITIONER].)