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1
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INSPECT CABIN TEMPERATURE SENSOR CONNECTOR
• Switch the ignition off.
• Disconnect the negative battery cable.
• Disconnect the cabin temperature sensor connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Are the connector and terminals normal?
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Yes
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Go to the next step.
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No
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Repair/replace the connector or terminal.
After repair procedure, go to the next step.
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2
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INSPECT CABIN TEMPERATURE SENSOR
• Inspect the cabin temperature sensor.
• Is it normal?
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Yes
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Go to the next step.
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No
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Replace the cabin temperature sensor.
Go to the next step.
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3
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INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
• Disconnect the climate control unit connector.
• Disconnect the cabin temperature sensor connector.
• Inspect for continuity between the following terminals (wiring harness-side):
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― Climate control unit terminal F—cabin temperature sensor terminal A
― Climate control unit terminal E—cabin temperature sensor terminal B
• Is there continuity?
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Yes
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Go to the next step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and cabin temperature 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.
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4
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INSPECT CABIN TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between the following terminal (wiring harness-side) and body ground:
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― Climate control unit terminal F
• Is there continuity?
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Yes
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Refer to the wiring diagram and verify whether or not there is a common connector between climate control unit terminal and cabin temperature 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 ground.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has a short to ground.
Go to the next step.
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No
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Connect the climate control unit connector, then go to the next step.
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5
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VERIFY CLIMATE CONTROL UNIT CONNECTOR CONDITION
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Are the connector and terminals normal?
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Yes
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Go to the next step.
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No
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Repair/replace the malfunctioning vehicle wiring harness, connector, or terminal.
After repair procedure, go to the next step.
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6
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INSPECT CABIN TEMPERATURE SENSOR CIRCUIT
• Connect the climate control unit connector.
• Connect the negative battery cable.
• Switch the ignition ON (engine off or on).
• Inspect the voltage at the following climate control unit terminal (wiring harness-side).
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― Terminal F (cabin temperature sensor input signal)
• Is the voltage normal? (Approx. 5 V)
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Yes
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The system is normal at present.
Go to the next step.
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No
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Go to the next step.
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7
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VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN
• Switch the ignition off.
• Disconnect the negative battery cable.
• Reconnect the disconnected connectors.
• Connect the negative battery cable.
• Clear the past malfunction from memory.
• Is DTC B1A61:11 or B1A61:13 output?
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Yes
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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.
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No
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Go to the next step.
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8
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VERIFY THAT NO OTHER DTCs ARE PRESENT
• Verify other DTCs displayed.
• Are any other DTCs output?
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Yes
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Perform the corresponding DTC inspection.
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No
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DTC troubleshooting completed.
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