DTC C1284 [BCM]
id0902f5838400
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DTC C1284 |
Oil pressure switch circuit failure |
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DETECTION CONDITION
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Open circuit in wiring harness between BCM and oil pressure switch
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POSSIBLE CAUSE
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• Oil pressure switch connector malfunction
• BCM connector malfunction
• Open circuit in wiring harness between BCM terminal 1A and oil pressure switch terminal A
• Oil pressure switch malfunction
• BCM malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT OIL PRESSURE SWITCH CONNECTOR
• Turn the ignition switch off.
• Disconnect the oil pressure switch connector.
• Inspect the oil pressure switch connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 5.
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No
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Go to the next step.
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2
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INSPECT BCM CONNECTOR
• Disconnect the BCM connector.
• Inspect the BCM connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 5.
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No
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Go to the next step.
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3
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INSPECT OIL PRESSURE SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Inspect for continuity between BCM terminal 1A (wiring harness-side) and oil pressure switch terminal A (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 Step 5.
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4
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INSPECT OIL PRESSURE SWITCH
• Inspect the oil pressure switch.
• Is there any malfunction?
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Yes
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Replace the oil pressure switch, then 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 TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the BCM memory using the M-MDS.
• Perform the BCM DTC inspection.
(See DTC INSPECTION [BCM].)
• Is the same DTC present?
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Yes
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Replace the BCM.
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No
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DTC troubleshooting completed.
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