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

DTC C0052 MOTOR AND MOTOR RELAY OFF FAILURE

DTC DETECTING CONDITION:

• Defective motor and motor relay

• Defective harness connector

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

• EBD may not operate.

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK VDCCM&H/U INPUT VOLTAGE.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the VDCCM&H/U.

3) Turn the ignition switch to ON.

4) Measure the voltage between VDCCM&H/U connector and chassis ground.

Connector & terminal

(B310) No. 23 (+) — Chassis ground (−):

(B310) No. 28 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

Repair the VDCCM&H/U power supply circuit.

2.CHECK INSTALLATION OF MOTOR GROUND.

Is the motor ground terminal installation bolt tightened 33 N·m (3.4 kgf-m, 24.3 ft-lb)?

Tighten the motor ground terminal attachment bolts.

3.CHECK VDCCM&H/U GROUND CIRCUIT.

1) Turn the ignition switch to OFF.

2) Measure the resistance between VDCCM&H/U connector and chassis ground.

Connector & terminal

(B310) No. 25 — Chassis ground:

(B310) No. 22 — Chassis ground:

Is the resistance less than 0.5 Ω?

Repair the VDCCM&H/U ground harness.

4.CHECK VDCCM&H/U MOTOR RELAY.

Measure the resistance between VDCCM&H/U connector terminals.

Terminals

No. 23 — No. 22:

Is the resistance 1 MΩ or more?

Replace the VDCCM&H/U.

5.CHECK POOR CONTACT OF CONNECTORS.

Turn the ignition switch to OFF.

Is there poor contact of connector between generator, battery and VDCCM&H/U?

Repair the connector.

6.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&H/U.

7.CHECK OTHER DTC DETECTION.

Is any other DTC displayed?

Perform the diagnosis according to DTC.

Temporary poor contact occurs.

NOTE:

Though the ABS warning light remains on at this time, this is normal. Drive the vehicle at 12 km/h (7 MPH) or more in order to turn ABS warning light off. Be sure to drive the vehicle and check that the warning light goes off.