DTC B1A63:12, B1A63:13, B1A64:12, B1A64:13 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]

id0702k2730000

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 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

•  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

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 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	• 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

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

INSPECT SOLAR RADIATION SENSOR CONNECTOR

•  Switch the ignition off.

•  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

•  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.
(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

INSPECT SOLAR RADIATION SENSOR CIRCUIT FOR OPEN CIRCUIT

•  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 1L—solar radiation sensor terminal A

―  Climate control unit terminal 1X—solar radiation sensor terminal C

―  Climate control unit terminal 1V—solar radiation sensor terminal B

•   Is there continuity?

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 cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

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

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

―  Climate control unit terminal 1L

―  Climate control unit terminal 1V

―  Climate control unit terminal 1X

•  Is the voltage 0V?

Yes

Go to the next step.

No

Repair the wiring harness.

Go to the next step.

5

VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION

•  Switch the ignition off.

•  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

•  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 cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].)

•  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 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.

STEP	INSPECTION		ACTION
1	INSPECT SOLAR RADIATION SENSOR CONNECTOR • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • 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.
1		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. (See SOLAR RADIATION SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].) • Is it normal?	Yes	Go to the next step.
2		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. • Inspect for continuity between the following terminals (wiring harness-side): ― Climate control unit terminal 1L—solar radiation sensor terminal A ― Climate control unit terminal 1X—solar radiation sensor terminal C ― Climate control unit terminal 1V—solar radiation sensor terminal B • Is there continuity?	Yes	Go to the next step.
3		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 cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Switch the ignition ON (engine off or on). • Measure the voltage at the following terminals (wiring harness-side): ― Climate control unit terminal 1L ― Climate control unit terminal 1V ― Climate control unit terminal 1X • Is the voltage 0V?	Yes	Go to the next step.
4		No	Repair the wiring harness. Go to the next step.
5	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Inspect the connector and terminals (corrosion, damage, pin disconnection). • Are the connector and terminals normal?	Yes	Go to the next step.
5		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 cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • 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.
6		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.
7		No	DTC troubleshooting completed.