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

DTC C0075 REVERSE SIGNAL

DTC DETECTING CONDITION:

Abnormal reverse signal

TROUBLE SYMPTOM:

Hill start assist does not operate.

WIRING DIAGRAM:

• LHD model

• RHD 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 REVERSE SIGNAL USING SUBARU SELECT MONITOR.

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

2) Read the indication of reverse signal.

Is OFF displayed when the shift lever is placed in any position other than reverse, and is ON displayed in reverse position?

3.CHECK BACK-UP LIGHT ILLUMINATION.

1) Turn the ignition switch to ON.

2) Place the shift lever in reverse position.

Does the back-up light illuminate?

Repair the back-up light circuit.

4.CHECK HARNESS BETWEEN BODY INTEGRATED UNIT AND BACK-UP LIGHT SWITCH.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from body integrated unit and back-up light switch.

3) Measure the resistance of harness between body integrated unit and back-up light switch connector.

Connector & terminal

Non-turbo model

(B280) No. 18 — (B24) No. 1:

Turbo model

(B280) No. 18 — (T13) No. 2:

Is the resistance less than 0.5 Ω?

Replace the back-up light switch.

Repair the harness between body integrated unit and back-up light switch connector.

5.CHECK THE 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.