DTC

C1186, C1266

Valve relay system

DETECTION CONDITION

• C1186

• DSC HU/CM internal valve relay remains OFF when valve relay ON is commanded.

• C1266

• DSC HU/CM internal valve relay remains ON (stuck) when valve relay OFF is commanded.

POSSIBLE CAUSE

• ABS 30 A fuse malfunction

• Open circuit or short to ground in the wiring harness between the battery and the DSC HU/CM terminal C

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

• Poor connection at connectors (female terminal)

STEP

INSPECTION

ACTION

1

• Is the ABS 30 A fuse normal?

Yes

Go to the next step.

No

Replace the fuse, then go to Step 3.

2

• Turn the ignition switch off.

• Disconnect DSC HU/CM connector.

• Turn the ignition switch to the ON position (engine off).

• Measure voltage between DSC HU/CM terminal C (harness-side) and ground.

• Is voltage B+?

Yes

Go to the next step.

No

Repair or replace the wiring harness for open circuit between battery positive terminal and DSC HU/CM terminal C, then go to the next step.

3

• Clear the DTC from the memory.

  (See ON-BOARD DIAGNOSIS[DYNAMIC STABILITY CONTROL (DSC)].)

• Is the same DTC present?

Yes

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

(See DSC HU/CM REMOVAL/INSTALLATION.)

No

Go to the next step.

4

• Are any other DTCs present?

Yes

Go to the applicable DTC inspection.

(See ON-BOARD DIAGNOSIS[DYNAMIC STABILITY CONTROL (DSC)].)

No

DTC troubleshooting completed.