DTC

C1A77:11

Valve relay

C1A77:12

C1A77:49

DETECTION CONDITION

• Malfunction detected in valve relay power supply voltage.

• Valve relay does not operate normally.

FAIL-SAFE FUNCTION

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

POSSIBLE CAUSE

• Open or short circuit in DSC HU/CM internal valve relay, or stuck valve relay

SYSTEM WIRING DIAGRAM

—

Step

Inspection

Action

1

• 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].)

• Are any DTCs present?

Yes

Replace the DSC HU/CM, then go to the next step.

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Go to the next step.

2

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

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

No

DTC troubleshooting completed.