TCM location

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The TCM is located on the trans-axle. You need to lift the vehicle and remove the left front tire to access it. Here are the directions for removal and replacement. It is below the Also, there are updates for programming of the TCM. And, you don't have to flash the PCM if this is done. If the TCM is replaced, then it will need done.

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TRANSMISSION CONTROL MODULE - REMOVAL
Removal

1. Position vehicle on a suitable hoist with the trans-axle in neutral See: Vehicle Lifting > Procedures > Hoisting.

2. Disconnect and isolate the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), disconnect the IBS connector first before disconnecting the negative battery cable.

3. Raise the vehicle enough to gain access to the left front wheel.

4. Remove the left front wheel See: Wheels and Tires > Removal and Replacement > Tires And Wheels - Removal.

5. Through the opening rearward of the suspension strut, remove the lower bolts holding the TCM to the trans-axle located below the power brake booster.

6. Lower the vehicle.

7. Remove the engine cover.

Pic 1

8. Disengage the lock (1) holding the wire connector to the TCM.

9. Separate the wire connector from the TCM.

10. Remove the bolts holding the top of the TCM to the trans-axle.

11. Separate the TCM from the vehicle.

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Installation

NOTE: When replacing a Transmission Control Module (TCM), the TCM must be programmed. Failure to properly program the TCM may result in the illumination of the Malfunction Indicator Lamp (MIL) and setting DTC(s).

NOTE: If this electronic Control Unit (ECU) is being replaced with a new unit, a diagnostics scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.

NOTE: The Valve Body Solenoid Learn procedure must be performed when the TCM and/or valve body is replaced. Failure to perform the Valve Body Solenoid Learn procedure will result in reduced shift quality.

1. Place the TCM in position on the vehicle.

2. Install the bolts to hold the top of the TCM to the trans-axle See: Automatic Transmission/Trans-axle > Specifications.

3. Insert the wire connector into the TCM.

See pic 1

4. Engage the lock to hold the wire connector to the TCM.

5. Install the engine cover.

6. Raise the vehicle.

7. Through the opening rearward of the suspension strut, install the lower bolts to hold the TCM to the transaxle located below the power brake booster See: Automatic Transmission/Transaxle > Specifications.

8. Install the left front wheel See: Wheels and Tires > Removal and Replacement > Tires And Wheels - Installation.

9. Lower the vehicle to the ground

10. Connect the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), connect the IBS connector to the negative battery cable.

11. Perform TCM programming and verification. See: Control Module, A/T > Programming and Relearning.

12. Road test the vehicle to verify the repair.

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If you replace the TCM, here is the relearn process.

TCM PROGRAMMING PROCEDURE - 948TE
TCM PROGRAMMING-948TE
PROGRAMMING THE TRANSMISSION CONTROL MODULE (TCM)

NOTE: When replacing a Transmission Control Module (TCM), the TCM must be programmed.

NOTE: Failure to properly program the TCM may result in the illumination of the Malfunction Indicator Lamp (MIL) and setting DTC(s).

NOTE: While performing the TCM programming procedure, the vehicle battery must be maintained between 10 and 16 volts. Ambient temperature must be between 0° C (32° F) 60° C (140° F). Vehicle must be in Park with brake pedal depressed.

1. Using the scan tool and Dealer Connect, download the appropriate TCM flash file to the scan tool.
2. Turn the Ignition ON, Engine not running.
3. Make sure the gear selector is in the PARK position.
4. Apply and hold the brake pedal for the duration of the programming procedure.
5. Following the menu on the scan tool, program the TCM.

NOTE: If this Electronic Control Unit (ECU) is being replaced with a new unit or if a new transmission has been installed, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU.
Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.
6. Using a scan tool, follow the on-screen instructions to perform the VIN Verification procedure. This only needs to be done if a new ECU or a new transmission has been installed.

NOTE: If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to perform the Valve Body Solenoid Learn procedure. Failure to perform the Valve Body Solenoid Learn procedure will result in reduced shift quality.
Using a scan tool, follow the on-screen instructions to perform the Valve Body Solenoid Learn procedure.

NOTE: If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to perform the TCM Adaptation procedure. Failure to perform the TCM Adaptation procedure will result in reduced shift quality.
Perform the TCM ADAPTATION procedure. See: Control Module, A/T > Programming and Relearning.
7. With the scan tool, erase DTCs.
8. With the scan tool, read TCM DTCs.

Does the scan tool display any DTCs?

Yes

- Perform the appropriate diagnostic procedure(s).

No

- Test Complete
- Perform the TRANSMISSION VERIFICATION TEST. See: A L L Diagnostic Trouble Codes ( DTC ) > Verification Tests.

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Let me know if this helps.

Take care,
Joe