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1
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INSPECT FUSE CONDITION
• Is the fuse (ABS/DSC M 50A) normal?
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Yes
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Go to the next step.
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No
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• If the fuse is blown:
-
? Refer to the wiring diagram and verify whether or not there is a common connector between fuse and DSC HU/CM terminal B.
If there is a common connector:
-
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
• Repair or replace the malfunctioning part.
If there is no common connector:
-
• Repair or replace the wiring harness which has a short to ground.
• Replace the fuse.
• If the fuse is damaged:
-
? Replace the fuse.
Go to Step5.
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2
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VERIFY PUMP MOTOR OPERATION
• Using the M-MDS, perform the simulation inspection for pump motor.
• Does the pump motor operate?
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Yes
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Go to Step5.
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No
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Go to the next step.
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3
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INSPECT PUMP MOTOR POWER SUPPLY CIRCUIT FOR OPEN OR SHORT TO GROUND CIRCUIT
• Switch the ignition OFF.
• Disconnect the DSC HU/CM connector.
• Switch the ignition ON (engine off).
• Measure the voltage between DSC HU/CM terminal B (wiring harness-side) and body ground.
• Is the voltage 10 V or more?
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Yes
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Go to the next Step.
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No
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Refer to the wiring diagram and verify whether or not there is a common connector between battery and DSC HU/CM terminal B.
If there is a common connector:
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open or short circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
• Repair or replace the wiring harness which has an open or short circuit.
Go to Step5.
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4
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INSPECT PUMP MOTOR GROUND CIRCUIT FOR OPEN CIRCUIT OR POOR GROUND
• Switch the ignition OFF.
• Disconnect the DSC HU/CM connector.
• Measure the resistance between DSC HU/CM terminal AL (wiring harness-side) and body ground.
• Is the resistance 0—1 ohm?
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Yes
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Go to the next step.
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No
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• If the open circuit could be detected in the wiring harness:
-
? Refer to the wiring diagram and verify whether or not there is a common connector between DSC HU/CM terminal AL and body ground.
If there is a common connector:
-
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
• Repair or replace the malfunctioning part.
If there is no common connector:
-
• Repair or replace the wiring harness which has an open circuit.
? Go to the next step.
• If the resistance is out of specification:
-
? Refer to the wiring diagram and verify whether or not there is a common connector between DSC HU/CM terminal AL and body ground.
If there is a common connector:
-
• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit and a poor ground.
• Repair or replace the malfunctioning part.
If there is no common connector:
-
• Repair or replace the wiring harness which has an open circuit and a poor ground.
? Go to the next step.
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5
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VERIFY DTC TROUBLESHOOTING COMPLETED
• Reconnect all disconnected connectors.
• Using the M-MDS, clear the DTC from the DSC HU/CM.
• Using the M-MDS, perform the DSC HU/CM DTC inspection.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step1.
If the malfunction recurs, replace the DSC 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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6
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VERIFY NO DTC IS 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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