|
1
|
INSPECT FUSE CONDITION
• Is the fuse (ABS/DSCM 50A) normal?
|
Yes
|
Go to the next step.
|
|
No
|
• 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.
|
|
2
|
VERIFY PUMP MOTOR OPERATION
• Using the M-MDS, perform the simulation inspection for pump motor.
• Does the pump motor operate?
|
Yes
|
Go to Step5.
|
|
No
|
Go to the next step.
|
|
3
|
INSPECT MOTOR RELAY POWER SUPPLY CIRCUIT FOR OPEN 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?
|
Yes
|
Go to the next Step.
|
|
No
|
Refer to the wiring diagram and verify whether or not there is a common connector in the followings:
• Battery—DC-DC converter terminal 3A
• DC-DC converter terminal 4A—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 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 Step5.
|
|
4
|
INSPECT PUMP MOTOR GROUND CIRCUIT FOR OPEN CIRCUIT OR POOR GROUND
• Switch the ignition OFF.
• Disconnect the DSC HU/CM connector.
• Inspect for continuity between DSC HU/CM terminal AL (wiring harness-side) and body ground.
• Is the resistance 0—1 ohm?
|
Yes
|
Go to the next step.
|
|
No
|
• 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.
• Repair or replace the malfunctioning part.
If there is no common connector:
-
• Repair or replace the wiring harness which has a poor ground.
― Go to the next step.
|
|
5
|
VERIFY DTC TROUBLESHOOTING COMPLETED
• Reconnect all disconnected connectors.
• Using the M-MDS, clear the DTC from the DSC HU/CM.
• Start the engine and drive the vehicle at 10 km/h {6.2 mph} or more.
• Using the M-MDS, perform the DSC HU/CM DTC inspection.
• Is the same DTC present?
|
Yes
|
Repeat the inspection from Step1.
If the malfunction recurs, replace the DSC HU/CM, then go to the next step.
|
|
No
|
Go to the next step.
|
|
6
|
VERIFY NO DTC IS PRESENT
• Are any DTCs present?
|
Yes
|
Go to applicable DTC inspection.
|
|
No
|
DTC troubleshooting completed.
|
