DTC B1B71:11, B1B71:13
id070200817100
DTC B1B71:11, B1B71:13 |
Evaporator temperature sensor system |
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POSSIBLE CAUSE
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• Evaporator temperature sensor malfunction
• Open or short circuit in wiring harness between climate control unit and evaporator temperature sensor
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Diagnostic Procedure
STEP |
INSPECTION |
ACTION |
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1
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• Inspect the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].)
• 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 evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)
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2
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• Disconnect the climate control unit connector and the evaporator temperature sensor connector.
• Is there an open circuit in the wiring harness between the following terminals of the climate control unit and the evaporator temperature sensor?
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Yes
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Repair the wiring harness.
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No
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Go to the next step.
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3
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• Is there a short circuit to ground in the wiring harness between climate control unit terminal 2E and evaporator temperature sensor terminal B?
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Yes
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Repair the wiring harness.
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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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4
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• Switch ignition to ON.
• Inspect the voltage at the following climate control unit terminal (wiring harness-side).
• Is the voltage normal? (Approx. 5 V)
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Yes
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The system is normal at present. (Clear the past malfunction from the memory.)
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No
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Inspect the connection of the climate control unit connector.
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