DTC

C0020:01

Pump motor

C0020:13

C0020:16

C0020:49

C0020:71

C0020:98

DETECTION CONDITION

• RR outlet solenoid valve malfunction is detected.

FAIL-SAFE FUNCTION

• Refer to “Fail-safe function table”. (See DTC TABLE [DSC HU/CM].)

POSSIBLE CAUSE

• Fuse (ABS/DSCM 50A) malfunction

• Open or short circuit in wiring harness between battery and DSC HU/CM terminal B

• Open circuit in wiring harness between DSC HU/CM terminal AL and body ground

• Poor connection at each connector

• Pump motor malfunction

• Pump motor is driven for long periods

Step

Inspection

Action

1

• 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

• Using the M-MDS, perform the simulation inspection for pump motor.

  (See SIMULATION INSPECTION [DSC HU/CM].)

• Does the pump motor operate?

Yes

Go to Step5.

No

Go to the next step.

3

• 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 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.

4

• 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?

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 a poor ground.

• 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

• Reconnect all disconnected connectors.

• Using the M-MDS, clear the DTC from the DSC HU/CM.

  (See CLEARING DTC [DSC HU/CM].)

• Using the M-MDS, perform the DSC HU/CM DTC inspection.

  (See DTC INSPECTION [DSC HU/CM].)

• 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.

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Go to the next step.

6

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [DSC HU/CM].)

No

DTC troubleshooting completed.