DTC B11F5:86, B1A69:86, U210A:86 [CLIMATE CONTROL UNIT (FULL-AUTO AIR CONDITIONER)]
id0702k2900700
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System malfunction location |
• B11F5:86: Invalid data (temperature) received from humidity sensor
• B1A69:86: Invalid data (humidity) received from humidity sensor
• U210A:86: Invalid data (windshield temperature) received from humidity sensor
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Detection condition
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• Front climate control unit receives the invalid data from the front body control module (FBCM).
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Fail-safe function
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B11F5:86
• Humidity sensor input value (temperature) is fixed at -40 °C {-40 °F}.
However, control is performed without humidity sensor.
B1A69:86
• Humidity sensor input value (humidity) is fixed at 100 %.
However, control is performed without humidity sensor.
U210A:86
• Humidity sensor input value (windshield temperature) is fixed at -40 °C {-40 °F}.
However, control is performed without humidity sensor.
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Possible cause
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• Malfunction in the wiring harness between the humidity sensor and front body control module (FBCM)
• Malfunction in the wiring harness between the front body control module (FBCM) and instrument cluster
• Malfunction in the wiring harness between the instrument cluster and front climate control unit
• Humidity sensor malfunction
• Instrument cluster malfunction
• Front body control module malfunction
• Front climate control unit malfunction
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System wiring diagram
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Not applicable
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Diagnostic Procedure
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STEP |
INSPECTION |
ACTION |
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1
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PERFORM CLIMATE CONTROL UNIT DTC INSPECTION
• Clear the DTC from the climate control unit memory using the M-MDS.
• Perform the DTC inspection for the climate control unit using the M-MDS.
• Is DTC U0155:00 or U0423:68 displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
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No
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Go to the next step.
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2
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PERFORM FRONT BODY CONTROL MODULE FBCM) DTC INSPECTION
• Perform the front body control module (FBCM) DTC inspection using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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3
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PERFORM INSTRUMENT CLUSTER DTC INSPECTION
• Perform the instrument cluster DTC inspection using the M-MDS.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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4
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VERIFY TROUBLESHOOTING COMPLETED
• Clear the DTC from the climate control unit memory using the M-MDS.
• Perform the DTC inspection for the climate control unit using the M-MDS.
• Is the same DTC displayed?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the front 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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5
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VERIFY THAT NO OTHER DTCs ARE PRESENT
• Verify other DTCs displayed.
• Are any other DTCs displayed?
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Yes
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Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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