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

DTC 72 VOLTAGE INPUTTED TO YAW RATE SENSOR EXCEEDS SPECIFICATION

DTC DETECTING CONDITION:

Defective yaw rate sensor

TROUBLE SYMPTOM:

• VDC does not operate.

• ABS does not operate.

WIRING DIAGRAM:

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1.CHECK YAW RATE & LATERAL G SENSOR POWER SUPPLY.

1) Turn the ignition switch to OFF.

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

3) Turn the ignition switch to ON.

4) Measure the voltage between yaw rate & lateral G sensor and chassis ground.

Connector & terminal

(B257) No. 3 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

2.CHECK VDCCM OUTPUT VOLTAGE.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from VDCCM.

3) Remove the VDCCM connector cover.

4) Connect the connector to the VDCCM.

5) Turn the ignition switch to ON.

6) Measure the voltage between VDCCM and chassis ground.

Connector & terminal

(B310) No. 50 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

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

3.CHECK POOR CONTACT OF CONNECTOR.

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

Repair or replace the VDCCM connector.

Replace the VDCCM.

4.CHECK YAW RATE & LATERAL G SENSOR HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from VDCCM.

3) Measure the resistance between VDCCM and yaw rate & lateral G sensor.

Connector & terminal

(B310) No. 65 — (B257) No. 4:

Is the resistance less than 0.5 Ω?

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

5.CHECK GROUND SHORT CIRCUIT OF HARNESS.

Measure the resistance between VDCCM and chassis ground.

Connector & terminal

(B310) No. 65 — Chassis ground:

Is the resistance 1 MΩ or more?

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

6.CHECK BATTERY SHORT OF HARNESS.

Measure the voltage between VDCCM and chassis ground.

Connector & terminal

(B310) No. 65 (+) — Chassis ground (−):

Is the voltage less than 0.5 V?

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

7.CHECK BATTERY SHORT OF HARNESS.

1) Turn the ignition switch to ON.

2) Measure the voltage between VDCCM and chassis ground.

Connector & terminal

(B310) No. 65 (+) — Chassis ground (−):

Is the voltage less than 0.5 V?

Replace the yaw rate & lateral G sensor.

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