DTC B2840 [INSTRUMENT CLUSTER]
id0902e8165400
DTC B2840 |
Ambient temperature sensor circuit malfunction |
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DETECTION CONDITION
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Open or short circuit in wiring harness between ambient temperature sensor and instrument cluster
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POSSIBLE CAUSES
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• Open or short circuit in wiring harness between ambient temperature sensor and instrument cluster
• Ambient temperature sensor malfunction
• Instrument cluster malfunction
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System Wiring Diagram
amxzzw00002302
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Diagnostic Procedure
STEP |
INSPECTION |
ACTION |
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1
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INSPECT AMBIENT TEMPERATURE SENSOR CONNECTOR CONDITION
• Turn the ignition switch to the LOCK position.
• Disconnect the ambient 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 Step 9.
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2
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INSPECT AMBIENT TEMPERATURE SENSOR
• Inspect the ambient temperature sensor.
• Is the ambient temperature sensor 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 ambient temperature sensor.
After replacement, go to Step 9.
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3
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INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR SHORT TO GROUND
• Inspect the wiring harness for continuity between ambient temperature sensor connector terminal B and body ground.
• Is there continuity?
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Yes
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Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 9.
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No
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Go to the next step.
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4
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INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch to the ON position.
• Measure the voltage at ambient temperature sensor connector terminal B.
• Is the voltage 5 V?
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Yes
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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 AMBIENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
• Measure the voltage at instrument cluster terminal 1I.
• Is the voltage 5 V?
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Yes
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Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 9.
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No
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Go to Step 8.
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6
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INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch to the LOCK position.
• Inspect the wiring harness for continuity between ambient temperature sensor connector terminal A and body ground.
• Is there continuity?
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Yes
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Go to Step 9.
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No
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Go to the next step.
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7
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INSPECT AMBIENT TEMPERATURE SENSOR CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between instrument cluster terminal 2P and body ground.
• Is there continuity?
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Yes
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Repair/replace the malfunctioning vehicle wiring harness.
After repair procedure, go to Step 9.
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No
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Go to the next step.
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8
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VERIFY INSTRUMENT CLUSTER CONNECTOR CONDITION
• Disconnect the instrument cluster 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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9
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VERIFY THAT SAME DTC IS NOT OUTPUT AGAIN
• Reconnect the disconnected connectors.
• Clear the DTC.
• VERIFY DTCs.
• Is DTC B2840 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 instrument cluster.
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No
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Go to the next step.
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10
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VERIFY THAT NO OTHER DTCs ARE PRESENT
• Verify other DTC 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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