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

DTC 42 POWER VOLTAGE MALFUNCTION

DTC DETECTING CONDITION:

• Power voltage for VDCCM is low.

• VDCCM voltage is too high. (Warning lights go off if voltage returns.)

TROUBLE SYMPTOM:

• ABS does not operate.

• VDC does not operate.

• EBD does not operate. (When the voltage is excessively low or high)

NOTE:

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

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK GENERATOR.

1) Start the engine.

2) Run the engine at idle after warming up.

3) Measure the voltage between generator terminal B and chassis ground.

Terminals

Generator B terminal — Chassis ground:

Is the voltage 10 — 15 V?

Repair the generator.

2.CHECK BATTERY TERMINAL.

Turn the ignition switch to OFF.

Are the positive and negative battery terminals clamped tightly?

Tighten the clamp of terminal.

3.CHECK VDCCM INPUT VOLTAGE.

1) Disconnect the connectors from VDCCM.

2) Run the engine at idle.

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

Connector & terminal

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

Is the voltage 10 — 15 V?

Repair the harness connectors between the battery, ignition switch and VDCCM.

4.CHECK GROUND CIRCUIT OF VDCCM.

1) Turn the ignition switch to OFF.

2) Measure the resistance between VDCCM and chassis ground.

Connector & terminal

(B310) No. 1 — Chassis ground:

(B310) No. 55 — Chassis ground:

Is the resistance less than 0.5 Ω?

Repair the VDCCM ground harness.

5.CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact in connectors between generator, battery and VDCCM?

Repair the connector.

6.CHECK 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.

7.CHECK ANY OTHER DTC ON DISPLAY.

Are other DTCs displayed?

Go to the diagnosis corresponding to the DTC.

Temporary poor contact occurs.