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 (-):	Is the voltage 10 - 15 V?	Go to step 2 .	Repair the power supply circuit.
2 CHECK VDCCM&H/U INPUT VOLTAGE. Calculate the voltage difference measured in step 1. (B310) No. 7 (+) - Chassis ground (-): (B310) No. 14 (+) - Chassis ground (-):	Is the voltage difference between A and B 2 V or more?	Repair the power supply circuit.	Go to step 3 .
3 CHECK INSTALLATION OF VDCCM&H/U GROUND.	Is the VDCCM&H/U ground terminal installation bolt tightened to 13 N.m (1.3 kgf-m, 9.6 ft-lb)?	Go to step 4 .	Tighten the VDCCM&H/U ground terminal installation bolt.
4 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 5 .	Repair the VDCCM&H/U ground harness.
5 CHECK VDCCM&H/U VALVE RELAY. Measure the resistance between VDCCM&H/U connector terminals. Connector & terminal (B310) No. 14 - (B310) No. 13:	Is the resistance 1 MΩ or more?	Go to step 6 .	Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
6 CHECK POOR CONTACT OF CONNECTORS.	Is there poor contact of connector between generator, battery and VDCCM&H/U?	Repair the connector.	Go to step 7 .
7 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 8 .
8 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.