80-JB566-1 Rev. G 11-1
MAY CONTAIN U.S. AND INTERNATIONAL EXPORT CONTROLLED INFORMATION
11
Troubleshooting Best Practices
Troubleshooting Guidelines
Keep Known Good MCP50 Component Spares in Shop
Spare parts should include:
• Vehicle Telematics Module (VTM50)
• Antenna
• Display Interface Unit (DIU50)
• Power/IO cable
Use a Test Cart to Perform Bad Part Verification/Double Checking
If an Omnitracs MCP50 part is diagnosed bad on a truck, insert the failed part on the test cart.
• If it continues to fail, part should be RMAd.
• If the suspect part does not fail on the test cart, further troubleshooting of the MCP50 will
be necessary.
Perform a Visual Inspection of the Installed MCP50
• Check for damaged cables, improper electrical connections, loose connections, and the
integrity of the installation, particularly the antenna.
• Bad mounts can contribute to system problems.
• Loose connections or parts not installed properly can allow excessive vibration which can
affect system performance.
Reseat All Cables
• Always inspect and reseat cable connectors prior to replacing any components.
• Inspect for corrosion and bent, broken, pushed, missing pins, and/or sockets.
Verify VTM50 LED Indicator Is in a Normal State
• When booting up, the Red LED should blink slowly at first then more quickly.
• Once boot up is completed, the Red LED should be off.
• During normal operations, the Red LED should be off.
• See section Chapter 22: VTM LED Indicator for more information.
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