DTC B1A63:12, B1A63:13, B1A64:12, B1A64:13 [FULL-AUTO AIR CONDITIONER]

id0702c1730000

DTC B1A63:12

Solar radiation sensor (RH) circuit short to power supply

DTC B1A63:13

Solar radiation sensor (RH) circuit open

DTC B1A64:12

Solar radiation sensor (LH) circuit short to power supply

DTC B1A64:13

Solar radiation sensor (LH) circuit open
POSSIBLE CAUSE
•  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 connector terminal 1H and solar radiation sensor connector terminal C
•  Open circuit in wiring harness between climate control unit connector terminal 1F and solar radiation sensor connector terminal B
•  Open circuit in wiring harness between climate control unit connector terminal 1C and solar radiation sensor connector terminal A
•  Short to power supply in wiring harness between climate control unit connector terminal 1H and solar radiation sensor connector terminal C
•  Short to power supply in wiring harness between climate control unit connector terminal 1F and solar radiation sensor connector terminal B
•  Connector or terminal malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT SOLAR RADIATION SENSOR CONNECTOR
•  Switch the ignition to off.
•  Disconnect the negative battery cable.
•  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?
―  1H—C
―  1F—B
―  1C—A
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
•  Is there a short circuit to power supply in the wiring harness between the following terminals of the climate control unit terminal and solar radiation sensor?
―  1H—C
―  1F—B
Yes
Repair the wiring harness.
Go to the next step.
No
Go to the next step.
5
VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION
•  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.
•  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.
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.