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Checking The Control Module



Checking The Control Module







- Ignition off.
- The breakout box connected.
- Connect the control module.
- 8-pin transmission connector disconnected.

Check the transmission control module (TCM) by measuring the resistance between terminals #4 and #32 on the breakout box. The resistance must be approximately 9 kilo Ohms.

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 disconnect the transmission connectors, see Transmission connectors.
- To replace the control module, see Transmission control module (TCM), replacing.
- For information about signals, see Signal description. Transmission control module (TCM).

Was the resistance OK?

YES: Refer to Trouble Code Description. Diagnostic Trouble Code Descriptions
NO: Continue with Next Procedure. Verification