Intermittent fault
- Ignition off.
Check the transmission control module (TCM) and speed sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation .
Check the power supply cable between transmission control module (TCM) terminal A59 and transmission connector terminal 16 for an intermittent open-circuit according to Open-circuit, intermittent faults .
Check the signal cable between transmission control module (TCM) terminal A41 and transmission connector terminal 19 for an intermittent open-circuit according to Open-circuit, intermittent faults .
Remedy as necessary.
Other information:
- To connect the breakout box, see Connecting the breakout box .
- To disconnect the transmission control module (TCM), see Transmission control module (TCM), replacing .
- To disconnect transmission connector, see Connecting the breakout box, GM automatic transmissions .
- For information about signals, see Signal specification .
- For information about signals to the transmission connector, see Signal description. Connector 4T65 EV/EV-GT .
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Refer to Information