VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC 52 MOTOR/MOTOR RELAY OFF MALFUNCTION

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

DTC 52 MOTOR/MOTOR RELAY OFF MALFUNCTION

DTC DETECTING CONDITION:

• Defective motor relay

• Defective harness connector

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

WIRING DIAGRAM:

• LHD model

• RHD model

STEP	CHECK	YES	NO
1.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.
2.CHECK CONTACT POINT OF MOTOR RELAY. 1) Turn the ignition switch to OFF. 2) Remove the motor relay from the relay box. 3) 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 MOTOR RELAY SHORT. Measure the resistance between motor relay terminals. Terminals No. 85 — No. 30: No. 85 — No. 87:	Is the resistance 1 MΩ or more?		Replace the motor relay.
4.CHECK GROUND SHORT CIRCUIT IN RELAY BOX CIRCUIT. 1) Disconnect the connectors (B370) (LHD model) and (F90) (RHD model) from relay box. 2) Measure the resistance between the relay box connector unit and chassis ground. Connector & terminal (VDC4) No. 4 — Chassis ground:	Is the resistance 1 MΩ or more?		Replace the relay box.
5.CHECK BATTERY SHORT CIRCUIT IN RELAY BOX CIRCUIT. Measure the voltage between the relay box connector and chassis ground. Connector & terminal (VDC4) No. 6 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Replace the relay box.
6.CHECK BATTERY SHORT CIRCUIT IN RELAY BOX CIRCUIT. 1) Turn the ignition switch to ON. 2) Measure the voltage between the relay box connector and chassis ground. Connector & terminal (VDC4) No. 6 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Replace the relay box.
7.CHECK HARNESS GROUND SHORT BETWEEN RELAY BOX AND VDCCM. 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. 22 — Chassis ground:	Is the resistance 1 MΩ or more?		Repair the harness between VDCCM and relay box. Check the fuse SBF holder.
8.CHECK HARNESS BATTERY SHORT BETWEEN RELAY BOX AND VDCCM. Measure the voltage between VDCCM connector and chassis ground. Connector & terminal (B310) No. 9 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Repair the harness between VDCCM and relay box.
9.CHECK HARNESS BATTERY SHORT BETWEEN RELAY BOX AND VDCCM. 1) Turn the ignition switch to ON. 2) Measure the voltage between VDCCM connector and chassis ground. Connector & terminal (B310) No. 9 (+) — Chassis ground (−):	Is the voltage less than 1 V?		Repair the harness between VDCCM and relay box.
10.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.
11.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.
12.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.