DTC B1B71:14 [INSTRUMENT CLUSTER]
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DTC B1B71:14 |
Evaporator temperature sensor circuit malfunction |
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Detection Condition
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• Open or short circuit in wiring harness between evaporator temperature sensor and instrument cluster.
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Possible Causes
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• Evaporator temperature sensor connector or terminals malfunction
• Evaporator temperature sensor malfunction
• Instrument cluster connector or terminals malfunction
• Short to ground in wiring harness between the following terminals:
• Open circuit in wiring harness between the following terminals:
• Instrument cluster malfunction
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System Wiring Diagram
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Diagnostic Procedure
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Step |
Inspection |
Action |
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1
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INSPECT EVAPORATOR TEMPERATURE SENSOR CONNECTOR AND TERMINALS
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable.
• Disconnect the evaporator temperature sensor connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is there any malfunction?
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Yes
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Repair or replace the connector or terminals, then go to Step 6.
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No
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Go to the next step.
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2
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INSPECT EVAPORATOR TEMPERATURE SENSOR
• Inspect the evaporator temperature sensor.
• Is there any malfunction?
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Yes
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Replace the evaporator temperature sensor, then go to Step 6.
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No
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Go to the next step.
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3
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INSPECT INSTRUMENT CLUSTER CONNECTOR AND TERMINALS
• Disconnect the instrument cluster connector.
• Inspect the connector and terminals (corrosion, damage, pin disconnection).
• Is there any malfunction?
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Yes
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Repair or replace the connector or terminals, then go to Step 6.
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No
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Go to the next step.
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4
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INSPECT EVAPORATOR TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND
• Verify that the evaporator temperature sensor and instrument cluster connectors are disconnected.
• Inspect for continuity between the following terminals (wiring harness-side) and body ground:
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to ground, then go to Step 6.
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No
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Go to the next step.
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5
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INSPECT EVAPORATOR TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
• Verify that the evaporator temperature sensor and instrument cluster connectors are disconnected.
• Inspect for continuity between the following terminals (wiring harness-side):
• 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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Repair or replace the wiring harness for a possible open circuit, then go to the next step.
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6
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VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Reconnect the negative battery cable.
• Clear the DTC using the M-MDS.
• Turn the ignition switch to the LOCK position and wait for 5 s or more.
• Perform the instrument cluster DTC inspection using the M-MDS.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the instrument cluster.
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 NO OTHER DTCs ARE PRESENT
• 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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DTC troubleshooting completed.
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