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

DTC 46 ABNORMAL VOLTAGE OF 5V POWER SUPPLY

DTC DETECTING CONDITION:

5 V power supply voltage malfunction

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

WIRING DIAGRAM:

• LHD model

• RHD model

STEPCHECKYESNO

1.CHECK GROUND SHORT IN SENSOR AND HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from VDCCM.

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

Connector & terminal

(B310) No. 50 — Chassis ground (lateral G sensor):

(B310) No. 77 — Chassis ground (pressure sensor):

Is the resistance 1 MΩ or more?

2.CHECK GROUND SHORT CIRCUIT OF HARNESS.

1) Disconnect the connector from the defective sensor.

2) Measure the resistance between VDCCM and chassis ground.

Connector & terminal

(B310) No. 50 — Chassis ground (lateral G sensor):

(B310) No. 77 — Chassis ground (pressure sensor):

Is the resistance 1 MΩ or more?

Replace the defective sensor.

Repair or replace the harness connector between VDCCM and the defective sensor.

3.CHECK BATTERY SHORT IN SENSOR AND HARNESS.

Measure the voltage between VDCCM and chassis ground.

Connector & terminal

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

(B310) No. 77 (+) — Chassis ground (−) (pressure sensor):

Is the voltage less than 0.5 V?

4.CHECK BATTERY SHORT IN SENSOR AND HARNESS.

1) Turn the ignition switch to ON.

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

Connector & terminal

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

(B310) No. 77 (+) — Chassis ground (−) (pressure sensor):

Is the voltage less than 0.5 V?

Replace the VDCCM.

5.CHECK BATTERY SHORT OF HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the defective sensor.

3) Measure the voltage between VDCCM and chassis ground.

Connector & terminal

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

(B310) No. 77 (+) — Chassis ground (−) (pressure sensor):

Is the voltage less than 0.5 V?

Repair or replace the harness connector between VDCCM and the defective sensor.

6.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. 50 (+) — Chassis ground (−) (lateral G sensor):

(B310) No. 77 (+) — Chassis ground (−) (pressure sensor):

Is the voltage less than 0.5 V?

Replace the defective sensor.

Repair or replace the harness connector between VDCCM and the defective sensor.