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 valve 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

STEP

INSPECTION

ACTION

1

• Switch the ignition to off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• 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 the solar radiation sensor.

  (See SOLAR RADIATION SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].)

• 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

• 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

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• 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

• Switch the ignition to off.

• Disconnect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• 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

• Reconnect the disconnected connectors.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• 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 DTCs 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.

  (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

Go to the next step.

No

Go to the next step.

7

• Verify other DTCs displayed.

• Are any other DTCs output?

Yes

Perform the corresponding DTC inspection.

No

DTC troubleshooting completed.