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

DTC 73 VOLTAGE INPUTTED TO LATERAL G SENSOR EXCEEDS SPECIFICATION

DTC DETECTING CONDITION:

Lateral G sensor malfunction

TROUBLE SYMPTOM:

ABS does not operate.

VDC does not operate.

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK OUTPUT OF YAW RATE & LATERAL G SENSOR USING SUBARU SELECT MONITOR.

1) Stop the vehicle on a flat road.

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

3) Read the yaw rate & lateral G sensor output on the Subaru Select Monitor display.

Is the resistance 2.5±0.2 V?

2.CHECK POOR CONTACT OF CONNECTOR.

Turn the ignition switch to OFF.

Is there poor contact in connector between VDCCM and yaw rate & lateral G sensor?

Repair the connector.

3.CHECK VDCCM.

1) Connect all connectors.

2) Erase the memory.

3) Perform the Inspection Mode.

4) Read the DTC.

In the current diagnosis, is the same DTC displayed again?

Replace the VDCCM.

4.CHECK ANY OTHER DTC ON DISPLAY.

Are other DTCs displayed?

Go to the diagnosis corresponding to the DTC.

Temporary poor contact occurs.

5.CHECK YAW RATE & LATERAL G SENSOR INPUT VOLTAGE.

1) Turn the ignition switch to OFF.

2) Remove the console box.

3) Disconnect the connector from yaw rate & lateral G sensor.

4) Turn the ignition switch to ON.

5) Measure the voltage between yaw rate & lateral G sensor connector terminals.

Connector & terminal

(B257) No. 3 (+) — No. 6 (−):

Is the voltage 10 — 15 V?

Repair the harness or connector between yaw rate & lateral G sensor and VDCCM.

6.CHECK YAW RATE & LATERAL G SENSOR.

1) Turn the ignition switch to OFF.

2) Measure the resistance between yaw rate & lateral G sensor connector terminals.

Terminals

No. 3 — No. 5:

Is the resistance between 4.3 — 4.9 kΩ?

Replace the yaw rate & lateral G sensor.

7.CHECK OPEN CIRCUIT FOR OUTPUT HARNESS AND GROUND HARNESS OF YAW RATE & LATERAL G SENSOR.

1) Connect the connector to the yaw rate & lateral G sensor.

2) Disconnect the connectors from VDCCM.

3) Measure the resistance between the VDCCM connector terminals.

Connector & terminal

(B310) No. 11 — No. 64:

Is the resistance between 4.3 — 4.9 kΩ?

Repair the harness between yaw rate & lateral G sensor and VDCCM.

8.CHECK GROUND SHORT IN YAW RATE & LATERAL G SENSOR HARNESS.

1) Disconnect the connector from yaw rate & lateral G sensor.

2) Measure the resistance between VDCCM connector and chassis ground.

Connector & terminal

(B310) No. 11 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the harness between yaw rate & lateral G sensor and VDCCM.

9.CHECK YAW RATE & LATERAL G SENSOR.

1) Turn the ignition switch to OFF.

2) Remove the yaw rate & lateral G sensors from vehicle.

3) Connect the connector to the yaw rate & lateral G sensor.

4) Connect the connector to the VDCCM.

5) Turn the ignition switch to ON.

6) Measure the voltage between yaw rate & lateral G sensor connector terminals.

Connector & terminal

(B257) No. 5 (+) — No. 6 (−):

Is the voltage 2.3 — 2.7 V when yaw rate & lateral G sensor is on a level?

Replace the yaw rate & lateral G sensor.

10.CHECK YAW RATE & LATERAL G SENSOR.

Measure the voltage between yaw rate & lateral G sensor connector terminals.

Connector & terminal

(B257) No. 5 (+) — No. 6 (−):

Is the voltage 3.3 — 3.7 V when yaw rate & lateral G sensor is inclined 90° to the left?

Replace the yaw rate & lateral G sensor.

11.CHECK YAW RATE & LATERAL G SENSOR.

Measure the voltage between yaw rate & lateral G sensor connector terminals.

Connector & terminal

(B257) No. 5 (+) — No. 6 (−):

Is the voltage 1.3 — 1.7 V when yaw rate & lateral G sensor is inclined 90° to the right?

Replace the yaw rate & lateral G sensor.

12.CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact in connector between VDCCM and yaw rate & lateral G sensor?

Repair the connector.

13.CHECK VDCCM.

1) Connect all connectors.

2) Erase the memory.

3) Perform the Inspection Mode.

4) Read the DTC.

In the current diagnosis, is the same DTC displayed again?

Replace the VDCCM.

14.CHECK ANY OTHER DTC ON DISPLAY.

Are other DTCs displayed?

Go to the diagnosis corresponding to the DTC.

Temporary poor contact occurs.