1646

Possible Causes

• •ECM broadcasts 120 packets to the network that are not received within a one second time period
• •CAN devices not powered or improperly grounded
• •CAN2 network improperly terminated
• •CAN2 wire routing affected by noise sources (ignition coils, spark plug coil wires, etc.)
• •Short circuit on CAN2 (+) and (-) wires

Suggested Actions

1. 1Verify that all CAN devices are powered and properly grounded
2. 2Verify that the CAN2 network is properly terminated
3. 3Check CAN2 wire routing with respect to noise sources (ignition coils, spark plug coil wires, etc.) and shield if necessary
4. 4Check CAN2 (+) and (-) wires for short circuits

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