Diagnostic Test
WARNING: This page is about a different variant/trim than selected.
- CHECK IF ABS DTCS ARE PRESENT
- With the scan tool, check for ABS DTCs.
Are any ABS DTCs present?
Yes
- Refer to DIAGNOSIS AND TESTING and perform the appropriate repair.
No
- Go to 2.
- With the scan tool, check for ABS DTCs.
- CHECK IF TRANSMISSION SOLENOID DTCS ARE PRESENT
- With the scan tool, check for other transmission DTCs.
Are any transmission solenoid, speed sensor and/or any other transmission electrical related DTCs present?
Yes
- Refer to DIAGNOSIS AND TESTING and perform the appropriate repair for those DTCs first.
No
- Go to 3.
- With the scan tool, check for other transmission DTCs.
- CHECK TRANSMISSION FLUID LEVEL NOTE:
Low fluid level can be the cause of many transmission problems. Visually inspect the transmission and cooler lines for leakage and repair as necessary and adjust the fluid level in accordance to the Service Information. If no visual leaks are observed and the vehicle has obtained over 1610 km (1000 miles) from new or transmission service, a fluid level check is unnecessary.
- Check the transmission fluid level and condition in accordance to the Service Information.
Is the fluid level correct?
Yes
- Go to 4.
No
- Correct the fluid level in accordance to the Service Information. Refer to FLUID AND FILTER, STANDARD PROCEDURE .
- Refer to STANDARD PROCEDURE and perform the TRANSMISSION VERIFICATION TEST.
- Check the transmission fluid level and condition in accordance to the Service Information.
- CHECK ENVIRONMENTAL DATA
- With the scan tool, check environmental data for P1731.
Did the environmental data show the code setting during a 3-4 upshift or 4-3 downshift?
Yes
- Replace and program the TCMA in accordance to the Service Information. Refer to VALVE BODY, REMOVAL .
- Refer to STANDARD PROCEDURE and perform the TRANSMISSION VERIFICATION TEST.
No
- Go to 5.
- With the scan tool, check environmental data for P1731.
- CHECK FOR INTERNAL TRANSMISSION PROBLEM
- Check for an internal transmission mechanical problems.
- Remove the transmission oil pan and inspect for excessive debris or a plugged transmission oil filter in accordance to the Service Information.
- Inspect the valve body for foreign material.
- This DTC is usually set due to an internal transmission problem such as but not limited to: stuck solenoid valve and/or contamination in the valve body, broken springs, leaking clutch seals, dislodged or broken snap ring etc.
- Check Service Information for the appropriate service procedure and any other possible causes.
Were any problems found?
Yes
- Repair as necessary.
- Refer to STANDARD PROCEDURE and perform the TRANSMISSION VERIFICATION TEST.
No
- Using the schematics as a guide, check the Transmission Control Module A (TCMA) terminals for corrosion, damage or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the TCMA in accordance to the Service Information. Refer to VALVE BODY, REMOVAL .
- Refer to STANDARD PROCEDURE and perform the TRANSMISSION VERIFICATION TEST.