VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC C0076 CLUTCH SIGNAL

DTC DETECTING CONDITION:

Abnormal clutch signal

TROUBLE SYMPTOM:

Hill start assist does not operate.

NOTE:

Depending on the user clutch operation patterns, the hill start assist warning light may illuminate for a while, and then go off.

Illumination condition:

While the vehicle speed is above 10 km/h, and the clutch switch signal ON (depressed) condition continues five minutes or more, if the vehicle speed lowers below 10 km/h, the module judge as abnormal (clutch switch stuck ON), and then turn on the warning light.

Turning off condition:

If the clutch switch signal OFF (foot released) condition continues one second, the module turns off the warning light.

The hill start assist function does not operate, while the warning light illuminates.

WIRING DIAGRAM:

• Gasoline engine model

• Diesel engine model

STEPCHECKYESNO

1.CHECK LAN SYSTEM.

Perform the diagnosis for LAN system.

Is there any fault in LAN system?

Perform the diagnosis according to DTC for LAN system.

2.CHECK CLUTCH SIGNAL USING SUBARU SELECT MONITOR.

1) Select {Current Data Display & Save} in Subaru Select Monitor.

2) Read the indication of clutch switch signal.

Is OFF displayed when the clutch pedal is not depressed, and is ON displayed when depressed?

3.CHECK CLUTCH SIGNAL OF ECM USING SUBARU SELECT MONITOR.

1) Select {Current Data Display & Save} on Subaru Select Monitor.

2) Read the indication of clutch switch signal.

Is OFF displayed when the clutch pedal is not depressed, and is ON displayed when depressed?

4.CHECK HARNESS BETWEEN ECM AND CLUTCH SWITCH.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM and clutch switch.

3) Measure the resistance of harness between ECM and clutch switch connector.

Connector & terminal

Gasoline non-turbo model

(B136) No. 34 — (B107) No. 2:

Gasoline engine turbo model

(B136) No. 25 — (B107) No. 2:

Diesel engine model

(B134) No. 28 — (B107) No. 2:

Is the resistance less than 0.5 Ω?

Repair the power supply circuit of clutch switch. Or replace the clutch switch.

Repair the harness between ECM and clutch switch connector.

5.CHECK VDCCM&H/U.

1) Connect all connectors.

2) Clear the memory.

3) Perform the Inspection Mode.

4) Read the DTC.

Is the same DTC displayed?

Replace the VDCCM only.

6.CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diagnosis according to DTC.

Temporary poor contact occurs.