DTC 06 [FULL-AUTO AIR CONDITIONER]

id0702c1802300

DTC 06

Cabin temperature sensor (present malfunction)
DETECTION CONDITION
•  The cabin temperature signal input from the cabin temperature sensor is -50 °C {58 °F} or less, or 100 °C {212 °F} or more.
POSSIBLE CAUSE
•  Cabin temperature sensor connector malfunction
•  Cabin temperature sensor malfunction
•  Open or short circuit in wiring harness between climate control unit and cabin temperature sensor
•  Climate control unit connector malfunction
•  Climate control unit malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
INSPECT CABIN TEMPERATURE SENSOR CONNECTOR CONDITION
•  Switch the ignition to off.
•  Remove the cabin temperature sensor.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
After repair procedure, go to Step 9.
2
INSPECT CABIN TEMPERATURE SENSOR
•  Inspect the cabin temperature sensor.
•  Is the cabin temperature sensor normal?
Yes
Go to the next step.
No
Replace the cabin temperature sensor.
(See CABIN TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
After replacement, go to Step 9.
3
INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR SHORT CIRCUIT TO GROUND
•  Inspect the wiring harness for continuity between cabin temperature sensor connector terminal D and body ground.
Note
•  Inspect for continuity while shaking the wiring harness between the cabin temperature sensor and climate control unit.
•  Is there continuity?
Yes
Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 9.
No
Go to the next step.
4
INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to ON.
•  Measure the voltage at cabin temperature sensor connector terminal D.
Note
•  Measure the voltage while shaking the wiring harness between the cabin temperature sensor and climate control unit.
•  Is the voltage 5 V?
Yes
Go to Step 6.
No
Go to the next step.
5
INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Measure the voltage at climate control unit connector terminal Q.
Note
•  Measure the voltage while shaking the wiring harness between the cabin temperature sensor and climate control unit.
•  Is the voltage 5 V?
Yes
Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 9.
No
Go to Step 8.
6
INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Switch the ignition to off.
•  Inspect the wiring harness for continuity between cabin temperature sensor connector terminal B and body ground.
Note
•  Inspect for continuity while shaking the wiring harness between the cabin temperature sensor and climate control unit.
•  Is there continuity?
Yes
Go to Step 9.
No
Go to the next step.
7
INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Inspect the wiring harness for continuity between climate control unit connector terminal S and body ground.
Note
•  Inspect for continuity while shaking the wiring harness between the cabin temperature sensor and climate control unit.
•  Is there continuity?
Yes
Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 9.
No
Go to the next step.
8
VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION
•  Disconnect the climate control unit connector.
•  Inspect the connector and terminals (corrosion, damage, pin disconnection).
•  Are the connector and terminals normal?
Yes
Go to the next step.
No
Repair/replace the connector or terminal.
After repair procedure, go to the next step.
9
VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN
•  Reconnect the disconnected connectors.
•  Verify DTCs.
•  Is DTC 06 output?
Yes
Repeat the inspection from Step 1.
•  If the malfunction does not recur, go to the next step.
•  If the malfunction recurs, replace the climate control unit.
No
Go to the next step.
10
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Verify other DTC displayed.
•  Are any other DTCs output?
Yes
Perform the corresponding DTC inspection.
No
DTC troubleshooting completed.