Example 3:

Using the DTCs stored in the memories, you have determined that none of the control modules are sending or receiving signals.

Fig 1: DTC Memories Table - None Of The Control Modules Are Sending Or Receiving Signals, Example 3

• Switch ignition off.
  Fig 2: Checking Two-Line Bus System - Short Circuits Between Bus Lines

  
• Disconnect the control modules connected across the bus lines and check for short circuits between the bus lines.
  Fig 3: Checking Two-Line Bus System - Bus Lines For Short Circuit To B+ Or Ground

  
• Check the bus lines for short circuit to B+ or Ground (GND).