DTC B1484
id040200805400
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DTC
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B1484
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Brake switch system
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DETECTION CONDITION
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• Open circuit in the wiring harness between the ABS HU/CM terminal and the brake switch terminal
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POSSIBLE CAUSE
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• Brake switch malfunction
• Open circuit in the wiring harness between the ABS HU/CM terminal N and the brake switch terminal
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT WIRING HARNESS BETWEEN ABS HU/CM AND BRAKE SWITCH FOR CONTINUITY
• Turn the ignition switch or engine switch off.
• Disconnect the ABS HU/CM connector.
• Is B+ correctly applied to ABS HU/CM connector terminal N when brake pedal depressed?
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Yes
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Go to Step 3.
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No
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Go to the next step.
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2
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INSPECT BRAKE SWITCH
• Inspect the brake switch.
(See BRAKE SWITCH INSPECTION.)
• Is the brake switch normal?
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Yes
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Repair or replace the wiring harness for open circuit between ABS HU/CM and brake switch, then go to the next step.
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No
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Replace the brake switch, then go to the next step.
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3
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VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the memory.
(See ON-BOARD DIAGNOSIS.)
• Are the same DTCs present?
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Yes
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Replace the ABS HU/CM, then go to the next step.
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No
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Go to the next step.
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4
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VERIFY AFTER REPAIR PROCEDURE
• Are any other DTC present?
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Yes
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Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSIS.)
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No
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DTC troubleshooting completed.
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