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

DTC 64 PRIMARY SUCTION SOLENOID VALVE MALFUNCTION

DTC DETECTING CONDITION:

• Defective harness connector

• Defective VDCH/U solenoid valve

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

• EBD does not operate.

NOTE:

At this time, the brake warning light illuminates as well as the VDC and ABS warning light.

WIRING DIAGRAM:

• LHD model

• RHD model

STEPCHECKYESNO

1.CHECK RESISTANCE OF SOLENOID VALVE.

1) Turn the ignition switch to OFF.

2) Disconnect two connectors (VDC1, B368) (LHD model) and (VDC1, F91) (RHD model) from VDCH/U.

3) Measure the resistance between VDCH/U connector terminals.

Connector & terminal

DTC 32

(VDC5) No. 1 — (VDC2) No. 2:

DTC 34

(VDC5) No. 4 — (VDC2) No. 2:

DTC 36

(VDC5) No. 3 — (VDC2) No. 2:

DTC 38

(VDC5) No. 2 — (VDC2) No. 2:

DTC 63

(VDC5) No. 10 — (VDC2) No. 2:

DTC 64

(VDC5) No. 11 — (VDC2) No. 2:

Is the resistance between 3.8 — 4.8 Ω?

Replace the VDCH/U.

2.CHECK SOLENOID VALVE GROUND SHORT.

Measure the resistance between VDCH/U connector and chassis ground.

Connector & terminal

DTC 32

(VDC5) No. 1 — Chassis ground:

DTC 34

(VDC5) No. 4 — Chassis ground:

DTC 36

(VDC5) No. 3 — Chassis ground:

DTC 38

(VDC5) No. 2 — Chassis ground:

DTC 63

(VDC5) No. 10 — Chassis ground:

DTC 64

(VDC5) No. 11 — Chassis ground:

Is the resistance 1 MΩ or more?

Replace the VDCH/U.

3.CHECK SOLENOID VALVE BATTERY SHORT.

1) Disconnect the connectors from VDCCM.

2) Measure the voltage between VDCH/U connector and chassis ground.

Connector & terminal

DTC 32

(VDC5) No. 1 (+) — Chassis ground (−):

DTC 34

(VDC5) No. 4 (+) — Chassis ground (−):

DTC 36

(VDC5) No. 3 (+) — Chassis ground (−):

DTC 38

(VDC5) No. 2 (+) — Chassis ground (−):

DTC 63

(VDC5) No. 10 (+) — Chassis ground (−):

DTC 64

(VDC5) No. 11 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Replace the VDCH/U.

4.CHECK SOLENOID VALVE BATTERY SHORT.

1) Turn the ignition switch to ON.

2) Measure the voltage between VDCH/U connector and chassis ground.

Connector & terminal

DTC 32

(VDC5) No. 1 (+) — Chassis ground (−):

DTC 34

(VDC5) No. 4 (+) — Chassis ground (−):

DTC 36

(VDC5) No. 3 (+) — Chassis ground (−):

DTC 38

(VDC5) No. 2 (+) — Chassis ground (−):

DTC 63

(VDC5) No. 10 (+) — Chassis ground (−):

DTC 64

(VDC5) No. 11 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Replace the VDCH/U.

5.CHECK BATTERY SHORT OF HARNESS.

1) Turn the ignition switch to OFF.

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

Connector & terminal

DTC 32

(B310) No. 29 (+) — Chassis ground (−):

DTC 34

(B310) No. 26 (+) — Chassis ground (−):

DTC 36

(B310) No. 25 (+) — Chassis ground (−):

DTC 38

(B310) No. 4 (+) — Chassis ground (−):

DTC 63

(B310) No. 32 (+) — Chassis ground (−):

DTC 64

(B310) No. 30 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Repair the harness between VDCCM and VDCH/U.

6.CHECK BATTERY SHORT OF HARNESS.

1) Turn the ignition switch to ON.

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

Connector & terminal

DTC 32

(B310) No. 29 (+) — Chassis ground (−):

DTC 34

(B310) No. 26 (+) — Chassis ground (−):

DTC 36

(B310) No. 25 (+) — Chassis ground (−):

DTC 38

(B310) No. 4 (+) — Chassis ground (−):

DTC 63

(B310) No. 32 (+) — Chassis ground (−):

DTC 64

(B310) No. 30 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Repair the harness between VDCCM and VDCH/U.

7.CHECK GROUND SHORT OF HARNESS.

1) Turn the ignition switch to OFF.

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

Connector & terminal

DTC 32

(B310) No. 29 — Chassis ground:

DTC 34

(B310) No. 26 — Chassis ground:

DTC 36

(B310) No. 25 — Chassis ground:

DTC 38

(B310) No. 4 — Chassis ground:

DTC 63

(B310) No. 32 — Chassis ground:

DTC 64

(B310) No. 30 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the harness between VDCCM and VDCH/U.

8.CHECK HARNESS CONNECTOR BETWEEN VDCCM AND VDCH/U.

1) Connect the connectors (B368) (LHD model) and (F91) (RHD model) to VDCH/U.

2) Measure the resistance between the VDCCM connector and VDCH/U connector.

Connector & terminal

DTC 32

(B310) No. 29 — (VDC2) No. 1:

DTC 34

(B310) No. 26 — (VDC2) No. 1:

DTC 36

(B310) No. 25 — (VDC2) No. 1:

DTC 38

(B310) No. 4 — (VDC2) No. 1:

DTC 63

(B310) No. 32 — (VDC2) No. 1:

DTC 64

(B310) No. 30 — (VDC2) No. 1:

Is the resistance between 4 — 6 Ω?

Repair the harness connector between VDCCM and VDCH/U.

9.CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact in connector between the VDCCM and VDCH/U?

Repair the connector.

10.CHECK THE VDCCM.

1) Connect all connectors.

2) Erase the memory.

3) Perform the Inspection Mode.

4) Read the DTC.

Is the same DTC displayed again?

Replace the VDCCM.

11.CHECK ANY OTHER DTC ON DISPLAY.

Are other DTCs displayed?

Go to the diagnosis corresponding to the DTC.

Temporary poor contact occurs.