DTC 13

id070200802800

DTC 13

Ambient temperature sensor system inspection

POSSIBLE CAUSE

•  Ambient temperature sensor malfunction

•  Open circuit in wiring harness between A/C amplifier connector terminal 2M and ambient temperature sensor connector terminal B

•  Open circuit in wiring harness between A/C amplifier connector terminal 2N and ambient temperature sensor connector terminal A

•  Short to ground in wiring harness between A/C amplifier terminal 2M and ambient temperature sensor connector terminal B

•  Connector or terminal malfunction

DTC 13	Ambient temperature sensor system inspection
POSSIBLE CAUSE	• Ambient temperature sensor malfunction • Open circuit in wiring harness between A/C amplifier connector terminal 2M and ambient temperature sensor connector terminal B • Open circuit in wiring harness between A/C amplifier connector terminal 2N and ambient temperature sensor connector terminal A • Short to ground in wiring harness between A/C amplifier terminal 2M and ambient temperature sensor connector terminal B • Connector or terminal malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

INSPECT AMBIENT TEMPERATURE SENSOR

•  Inspect the ambient temperature sensor.
(See AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].)

•  Is it normal?

Yes

Go to the next step.

No

Replace the ambient temperature sensor.

(See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

2

INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT

•  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?

―  2M—B

―  2N—A

Yes

Repair the wiring harness.

No

Go to the next step.

3

INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND

•  Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2M 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

INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT

•  Switch the ignition to ON.

•  Inspect the voltage at the following A/C amplifier terminal (wiring harness side).

―  Terminal 2M (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).

STEP	INSPECTION		ACTION
1	INSPECT AMBIENT TEMPERATURE SENSOR • Inspect the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].) • Is it normal?	Yes	Go to the next step.
1		No	Replace the ambient temperature sensor. (See AMBIENT TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2	INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT • 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? ― 2M—B ― 2N—A	Yes	Repair the wiring harness.
2		No	Go to the next step.
3	INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND • Is there a short circuit to ground in the wiring harness between A/C amplifier connector (16-pin) terminal 2M and ambient temperature sensor connector terminal B?	Yes	Repair the wiring harness.
3		No	Connect the A/C amplifier connector (16-pin), then go to the next step.
4	INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT • Switch the ignition to ON. • Inspect the voltage at the following A/C amplifier terminal (wiring harness side). ― Terminal 2M (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.)
4		No	Inspect the connection at the A/C amplifier connector (16-pin).