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

DTC 52 MOTOR MALFUNCTION

DTC DETECTING CONDITION:

• Defective motor

• Defective motor relay

• Defective harness connector

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

WIRING DIAGRAM:

• LHD model

• RHD model

STEPCHECKYESNO

1.CHECK CONTACT POINT OF MOTOR RELAY.

1) Turn the ignition switch to OFF.

2) Remove the motor relay from the relay box.

3) Connect the battery to motor relay terminals No. 85 and No. 86.

4) Measure the resistance between motor relay terminals.

Terminals

No. 30 — No. 87:

Is the resistance less than 0.5 Ω?

Replace the motor relay.

2.CHECK CONTACT POINT OF MOTOR RELAY.

1) Disconnect the battery from the motor relay terminals.

2) Measure the resistance between motor relay terminals.

Terminals

No. 30 — No. 87:

Is the resistance 1 MΩ or more?

Replace the motor relay.

3.CHECK INPUT VOLTAGE OF RELAY BOX.

1) Disconnect the connectors (B369) (LHD model) and (F89) (RHD model) from relay box.

2) Disconnect the connectors from VDCCM.

3) Turn the ignition switch to ON.

4) Measure the voltage between the relay box connector and chassis ground.

Connector & terminal

LHD

(B369) No. 2 (+) — Chassis ground (−):

RHD

(F89) No. 2 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

Repair the harness connector between battery and relay box and check the fuse SBF-holder.

4.CHECK INPUT VOLTAGE OF MOTOR RELAY.

1) Turn the ignition switch to OFF.

2) Connect the connectors (B369) (LHD model) and (F89) (RHD model) to relay box.

3) Turn the ignition switch to ON.

4) Measure the voltage between the relay box and chassis ground.

Connector & terminal

Motor relay installation point No. 87 (+) — Chassis ground (−):

Is the voltage 10 — 15 V?

Replace the relay box.

5.CHECK MOTOR GROUND STATUS.

Is the motor ground terminal tightened to 33±10 N·m (3.3±1.0 kgf-m, 24±7 ft-lb)?

Tighten the motor ground terminal clamp.

6.CHECK VDCCM MOTOR DRIVE TERMINAL.

1) Turn the ignition switch to OFF.

2) Remove the VDC connector cover.

3) Connect all connectors.

4) Install the motor relay.

5) Check the ABS sequence control.

6) Measure the voltage between VDCCM connector terminals.

Connector & terminal

(B310) No. 22 (+) — No. 1 (−):

Does the voltage fall from 10 V — 13 V to less than 1.5 V, and then rise to 10 V — 13 V again when checking the ABS sequence control?

Replace the VDCCM.

7.CHECK MOTOR OPERATION.

Check the ABS sequence control.

Can the motor revolution noise (engine sound) be heard when checking the ABS sequence control?

Replace the VDCH/U.

8.CHECK POOR CONTACT OF CONNECTOR.

Turn the ignition switch to OFF.

Is there poor contact in connectors between the VDCH/U, relay box and VDCCM?

Repair the connector.

9.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.

10.CHECK ANY OTHER DTC ON DISPLAY.

Are other DTCs displayed?

Go to the diagnosis corresponding to the DTC.

Temporary poor contact occurs.

NOTE:

The ABS warning light will remain lit until the vehicle reaches approximately 12 km/h (7.46 MPH) even when the memory is cleared. This is normal.