Example 2

From the DTCs stored in the memories, you have determined that control module 2 is not communicating with control modules 1 and 3.

Fig 1: Schematic - Control Module 2 Is Not Communicating With Control Modules 1 & 3

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Fig 2: Example 2 DTCs Stored In Memory - Control Module 2 Is Not Communicating With Control Modules 1 & 3

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• Switch ignition off.
• Disconnect the control modules connected across the bus lines and check the bus lines for an open circuit.

  See appropriate System Wiring Diagram article.

• If you cannot find a malfunction in the bus lines, replace control module 2.