DTC B10BE:12, B10BE:13 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]

id0702k2200200

DESCRIPTION
•  B10BE:12
―  Solar radiation sensor circuit short to power supply
•  B10BE:13
―  Solar radiation sensor circuit open
DETECTION CONDITION
•  Malfunction in wiring harness between solar radiation sensor and climate control unit
FAIL-SAFE FUNCTION
Malfunction determined when IG SW at ON
•  The solar radiation sensor input value is fixed at the value directly before the malfunction only when the value is 1,450 W/m2 or more.
Malfunction already exists when IG SW turned to ON
•  Solar radiation sensor value is fixed at 0 W/m2.
POSSIBLE CAUSE
•  Solar radiation sensor connector malfunction
•  Solar radiation sensor malfunction
•  Open circuit in wiring harness between climate control unit and solar radiation sensor
•  Short to power supply in wiring harness between climate control unit and solar radiation sensor
•  Climate control unit connector malfunction
•  Climate control unit malfunction
SYSTEM WIRING DIAGRAM

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT SOLAR RADIATION SENSOR CONNECTOR
•  Switch the ignition to off.
•  Disconnect the negative battery terminal.
•  Disconnect the solar radiation sensor 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.
2
INSPECT SOLAR RADIATION SENSOR
•  Inspect the solar radiation sensor.
•  Is it normal?
Yes
Go to the next step.
No
Replace the solar radiation sensor.
(See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
Go to the next step.
3
INSPECT SOLAR RADIATION SENSOR CIRCUIT FOR OPEN CIRCUIT
•  Disconnect the climate control unit connector and the solar radiation sensor connector.
•  Is there continuity between the following terminals of the climate control unit and the solar radiation sensor?
―  H—A
―  K—B
Yes
Go to the next step.
No
Repair the wiring harness.
Go to the next step.
4
INSPECT SOLAR RADIATION SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY
•  Connect the negative battery terminal.
•  Switch the ignition to ON.
•  Measure the voltage of solar radiation sensor connector terminals A and B of solar radiation sensor harness side connector.
•  Is the voltage measured?
Yes
Repair the wiring harness.
Go to the next step.
No
Go to the next step.
5
VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION
•  Switch the ignition to off.
•  Disconnect the negative battery terminal.
•  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 malfunctioning vehicle wiring harness, connector, or terminal.
After repair procedure, go to the next step.
6
VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN
•  Reconnect the disconnected connectors.
•  Connect the negative battery terminal.
•  Switch the ignition to ON.
•  Clear the DTC for the climate control unit using the M-MDS. (See CLEARING DTC [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
•  Perform the DTC inspection for the climate control unit using the M-MDS. (See DTC DISPLAY [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
•  Is the same Pending DTC present?
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.
Go to the next step.
No
Go to the next step.
7
VERIFY THAT NO OTHER DTCs ARE PRESENT
•  Verify other DTCs displayed.
•  Are any other DTCs output?
Yes
Perform the corresponding DTC inspection.
No
DTC troubleshooting completed.