System malfunction location

• B1A63:12: Solar radiation sensor (RH) circuit short to power supply

• B1A63:13: Solar radiation sensor (RH) circuit open

• B1A64:12: Solar radiation sensor (LH) circuit short to power supply

• B1A64:13: Solar radiation sensor (LH) circuit open

Detection condition

• Malfunction in wiring harness between solar radiation sensor and climate control unit

Fail-safe

Malfunction determined when ignition switched 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 ignition switched ON

• Solar radiation sensor value is fixed at 0 W/m².

Possible cause

• Connector or terminal malfunction

• Light amount shone on the solar radiation sensor is insufficient (Circuit is normal)

• 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 malfunction

STEP

INSPECTION

ACTION

1

• Switch the ignition off.

• Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• 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.

• Inspect for continuity between the following terminals (wiring harness-side):

• Climate control unit terminal 1N—solar radiation sensor terminal A

• Climate control unit terminal 1M—solar radiation sensor terminal C

• Climate control unit terminal 1O—solar radiation sensor terminal B

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and solar radiation sensor terminal.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has an open circuit.

Go to the next step.

4

• Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• Climate control unit terminal 1N

• Climate control unit terminal 1M

• Climate control unit terminal 1O

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and solar radiation sensor terminal.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Repair or replace the malfunctioning part.

If there is no common connector:

• Repair or replace the wiring harness which has a short to power supply.

Go to the next step.

5

• Switch the ignition off.

• Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• 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 [SKYACTIV-G 2.5].)

• Clear the past malfunction from memory.

• Verify DTCs.

• Is DTC B1A63:12, B1A63:13, B1A64:12 or B1A64:13 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. (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.