Checking the control module

Fig 1: Identifying Ignition OFF

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Fig 2: Identifying Connectors

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Fig 3: Identifying Connecting Control Module

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• Ignition off
• The breakout box connected
• Connect the control module.
• Transmission connector c disconnected
• Gear selector in position p.

  Check the transmission control module (TCM) by measuring the resistance between terminals #b6 (#a66) and #a53 (#a53) on the breakout box. The resistance must be approximately 9 kΩ.

  NOTE:

  When removing the transmission connector, the control module may store diagnostic trouble codes (DTCs) for the gear-shift position sensor, the shift solenoids, the temperature sensor etc.

  Try a new control module if the resistance is infinite.

  Other information: 

  • To connect the breakout box, see Connecting the breakout box
  • To disconnect the transmission connectors, see Connectors, transmission, disconnecting / connecting
  • To replace the control module, see Transmission control module (TCM), replacing
  • For information about signals, see Signal description. Transmission control module (TCM) .
  Fig 4: Identifying Breakout Box

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  Fig 5: Identifying Ohmmeter

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Was the resistance ok? 

• Yes 

  Fault not found:  troubleshooting has been completed.

• No 

  Refer to Verification