Buick Regal: Gear Selector -N- Position Learn

Diagnostic Instructions

• Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis

Description

• For an overview of the component/system, refer to Electronic Component Description
• This procedure triggers the control module to learn the values of the component:

When to Perform the Procedure

NOTE: Failure to perform this procedure may result in poor system performance, DTCs being set, or customer dissatisfaction.

This procedure is required when the following component has been repaired, replaced, removed, or serviced:

• K71 Transmission Control Module
• T12 Automatic Transmission Assembly

Conditions for Running the Procedure

• Transmission Range=Neutral
• Park Brake=Applied
• Drive Wheels=Blocked

Reference Information

Scan Tool: Reference

Refer to Control Module: References

With Scan Tool

1. Ignition - On / Vehicle - In Service Mode.

2. Select:Module Diagnostics.

3. Select:Transmission Control Module.

4. Select:Configuration/Reset Functions.

5. Select:Gear Selector -N- Position Learn.

6. Follow the instructions on the scan tool.

7. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

For control module replacement, programming, and setup: Refer to Control Module: References

LEARNED VALUES RESET

Diagnostic Instructions

• Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis

Description

For an overview of the component/system, refer to Electronic Component Description

This procedure resets the control module learned values of the component/system:K71 Transmission Control Module

When to Perform the Procedure

NOTE: Failure to perform this procedure may result in poor system performance, DTCs being set, or customer dissatisfaction.

This procedure is required when the following component has been repaired, replaced, removed, or serviced:

• K71 Transmission Control Module
• T12 Automatic Transmission Assembly

Conditions for Running the Procedure

Transmission Fluid Temperature=50 to 80ºC (122 to 176ºF)

Reference Information

Scan Tool: Reference

Refer to Control Module: References

With Scan Tool

1. Ignition - On / Vehicle - In Service Mode.

2. Select:Module Diagnostics.

3. Select:Transmission Control Module.

4. Select:Configuration/Reset Functions.

5. Select:Learned Values Reset.

6. Follow the instructions on the scan tool.

7. Perform the following steps:

1. Engine=Running
2. Move the selector lever from N to D and wait 5 s in each range. Then move the selector lever back to N.
3. Move the selector lever from N to R and wait 5 s in each range. Then move the selector lever back to N.

NOTE: Step 5, 6, 7 requires the vehicle to be driven on the road. Do NOT use manual mode function to perform the following steps:

4.  
5. Transmission=Drive
6. From a stop, accelerate to 72 km/h (45 MPH) with the throttle position between 15 and 25%.
7. From a stop, accelerate to 72 km/h (45 MPH) with the throttle position between 45 and 55%.
8. From a stop, accelerate to 72 km/h (45 MPH) with the throttle position greater than 70%.
9. Ignition=Off - For greater than 2 min
10. From a stop, accelerate until the transmission reaches gear 8 and then coast down to a stop. - More than 10 times.

8. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

For control module replacement, programming, and setup: Refer to Control Module: References

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