DTC 07

id070200802400

DTC 07

Cabin temperature sensor system inspection
POSSIBLE CAUSE
•  Cabin temperature sensor malfunction
•  Open circuit in wiring harness between A/C amplifier connector terminal 2J and cabin temperature sensor connector terminal B
•  Open circuit in wiring harness between A/C amplifier connector terminal 2N and cabin temperature sensor connector terminal A
•  Short to ground in wiring harness between A/C amplifier connector terminal 2J and cabin temperature sensor connector terminal B
•  Connector or terminal malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT CABIN TEMPERATURE SENSOR
•  Inspect the cabin temperature sensor.
•  Is it normal?
Yes
Go to the next step.
No
Replace the cabin temperature sensor.
(See CABIN TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
2
INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Disconnect the A/C amplifier connector (16-pin) and the cabin 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 cabin temperature sensor connector?
―  2J—B
―  2N—A
Yes
Repair the wiring harness.
No
Go to the next step.
3
INSPECT CABIN 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 2J and cabin temperature sensor connector terminal B?
Yes
Repair the wiring harness.
No
Connect the A/C amplifier connector (16-pin) and go to the next step.
4
INSPECT CABIN TEMPERATURE SENSOR CIRCUIT
•  Switch the ignition to ON.
•  Inspect the voltage at the following A/C amplifier terminal (wiring harness side).
―  Terminal 2J (16-pin, cabin 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).