Checking the wiring

HINT: 2 breakout boxes can be used to make fault-tracing easier. 

Fig 1: Identifying Ignition OFF

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Fig 2: Identifying Connector(s) Disconnected

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Fig 3: Identifying Control Module Disconnected

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• Ignition off
• Connect the breakout box
• Disconnect the control module.
• Disconnect the transmission connector
• Connect adapter 9511505 and breakout box 9813190 to the transmission connector (transmission side).

  Check the cable between control module terminal #51 (#A51) and transmission connector (control module side) terminal #T (#A17). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

  Check the cable between control module terminal #53 (#A53) and transmission connector (control module side) terminal #E (#A5). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.

  HINT: Also check all the other power supply cables in the circuit. 

  Remedy as necessary.

  Other information: 

  • To connect the breakout box, see Connecting the breakout box
  • To connect the breakout box to the transmission connector, see Connecting the breakout box, GM automatic transmissions
  • For information about signals, see Signal specification
  • See Checking wiring and terminals
  Fig 4: Identifying Breakout Box

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  Fig 5: Identifying Volts Display

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Was a fault detected? 

• YES 

  Refer to Checking diagnostic trouble codes (DTCs) 

• NO 

  Refer to Checking the circuit for solenoid SL