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 valve is 4.9 V. 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 the following terminals: ―  Climate control unit terminal P—solar radiation sensor terminal A ―  Climate control unit terminal J—solar radiation sensor terminal B •  Short to power supply in wiring harness between the following terminals: ―  Climate control unit terminal P—solar radiation sensor terminal A ―  Climate control unit terminal J—solar radiation sensor terminal B •  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.) •  Disconnect the solar radiation sensor connector. (See SOLAR RADIATION SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) •  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 Step 6.
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 Step 6.
3	VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION •  Disconnect the climate control unit connector. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) •  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 Step 6.
4	INSPECT SOLAR RADIATION SENSOR CIRCUIT FOR OPEN CIRCUIT •  Inspect for continuity between the following terminals (wiring harness-side): ―  Climate control unit terminal P—solar radiation sensor terminal A ―  Climate control unit terminal J—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 Step 6.
5	INSPECT SOLAR RADIATION SENSOR CIRCUIT FOR SHORT TO POWER SUPPLY •  Connect the negative battery cable. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) •  Switch the ignition ON (engine off or on). •  Measure the voltage at the following terminals (wiring harness-side): ―  Climate control unit terminal P ―  Climate control unit terminal J •  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.
6	VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN •  Switch the ignition off. •  Disconnect the negative battery cable. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) •  Reconnect the disconnected connectors. •  Connect the negative battery cable. (See CLIMATE CONTROL UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].) •  Clear the DTC from the climate control unit memory 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 DTC displayed?	Yes	Repeat the inspection from Step 1. •  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 displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)].)
		No	DTC troubleshooting completed.