High Speed CAN Communication Bus (-) High

Description

The CAN Low wire voltage is higher than expected, indicating a short to power.

Symptoms

• CAN bus failure
• Multiple communication errors
• Systems unresponsive

Common Causes

• CAN L shorted to battery voltage
• Wiring harness damage
• Module fault driving CAN L high

Diagnostic Steps

1. Measure CAN L voltage
2. Disconnect modules to isolate
3. Inspect wiring for shorts to power circuits
4. Check harness routing near power wires

Repair Notes

Repair CAN L short to power. Ensure CAN wiring is properly separated from power wiring.

Related Codes

Other Network Codes

U0008 on Other Vehicles

Common Questions

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