Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK VDCCM&H/U INPUT VOLTAGE. Turn the ignition switch to OFF. Disconnect the connector from the VDCCM&H/U. Run the engine at idle. Measure the voltage between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 7 (+) - Chassis ground (-): (B310) No. 14 (+) - Chassis ground (-): (B310) No. 1 (+) - Chassis ground (-):	Is the voltage 10 - 15 V?	Go to step 2 .	Repair the power supply circuit.
2 CHECK VDCCM&H/U GROUND CIRCUIT. Turn the ignition switch to OFF. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 13 - Chassis ground:	Is the resistance less than 10 Ω?	Go to step 3 .	Repair the VDCCM&H/U ground harness.
3 CHECK POOR CONTACT OF CONNECTORS.	Is there poor contact of connector between generator, battery and VDCCM&H/U?	Repair the connector.	Go to step 4 .
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.	Is the same DTC displayed?	Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >	Go to step 5 .
5 CHECK OTHER DTC DETECTION.	Is any other DTC displayed?	Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >	Temporary poor contact occurs.