Component Tests and General Diagnostics

How to Troubleshoot Circuits at the VTM-4 Control Unit

Special Tools Required
Backprobe set 07SAZ-001000A (two required)

1. Remove the right side kick panel to gain access to the VTM-4 control unit.
2. Inspect the circuit on the VTM-4 control unit according to the DTC Troubleshooting using the special tools and a digital multimeter or an analog circuit tester.
3. Connect the backprobe adapters (A) to the stacking patch cords (B), and connect the cords to the multimeter or an analog circuit tester (C). Using the wire insulator as a guide for the contoured-tip of the backprobe adapter, gently slide the tip into the connector from the wire side until it comes in contact with the terminal end of the wires.

If the DTC returns, refer to the DTC Troubleshooting. If the DTC does not return, there was an intermittent problem within the circuit. Make sure all connectors and terminals in the circuit are tight.