DTC U0302-00: Software Incompatibility with Transmission Control Module [08/2018 - ]: Procedure

1. Switch the ignition off, then ON (engine off).
2. Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

   Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]

   Powertrain > Engine > Trouble Codes 

3. Are any other PENDING CODEs and/or DTCs present?

   Result

   Result
   Yes
   No

Result: 

Yes 

GO TO THE APPLICABLE PENDING CODE OR DTC INSPECTION. 

1. Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2018 - 08/2019] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ]

Result: 

No 

See step  2

1. Switch the ignition off.
2. Disconnect the TCM connector.
3. Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
4. Is there any malfunction?

   Result

   Result
   Yes
   No

Result: 

Yes 

See step  11

Result: 

No 

See step  3

1. Disconnect the ECM connector.
2. Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
3. Is there any malfunction?

   Result

   Result
   Yes
   No

Result: 

Yes 

See step  10

Result: 

No 

See step  4

1. Perform the TCM DTC inspection using the Techstream.

   Refer to ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION [07/2015 - ]

   Powertrain > Transmission > Trouble Codes 

2. Are any DTCs present?

   Result

   Result	Proceed to
   DTC U007400 or U011500 is displayed:	Yes (A)
   DTC other than U007400 and U011500 is displayed:	Yes (B)
   -	No

Result: 

No 

See step  8

Result: 

Yes (A) 

See step  9

Result: 

Yes (B) 

DTC OTHER THAN U007400 AND U011500 IS DISPLAYED: 

1. Go to the applicable DTC inspection.

   Refer to DIAGNOSTIC TROUBLE CODE CHART [07/2015 - 08/2019] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ]

1. Always reconnect all disconnected connectors.
2. Clear the DTC from the ECM memory using the Techstream.

   Refer to AFTER REPAIR PROCEDURE [07/2015 - ]

   Powertrain > Engine > Clear DTCs 

3. Perform the KOEO or KOER self test.

   Refer to ON-DEMAND SELF-TEST/KEY-ON ENGINE RUNNING SELF-TEST [07/2015 - ]

   Powertrain > Engine > Utility 

   Tester Display
   Key-On Engine Running Self-Test

   Powertrain > Engine > Utility 

   Tester Display
   On-Demand Self-Test

4. Is the same DTC present?

   Result

   Result
   Yes
   No

Result: 

Yes 

See step  7

Result: 

No 

See step  6

1. Perform the "AFTER REPAIR PROCEDURE".

   Refer to AFTER REPAIR PROCEDURE [07/2015 - ]

2. Are any DTCs present?

   Result

   Result
   Yes
   No

Result: 

No 

DTC TROUBLESHOOTING COMPLETED. 

Result: 

Yes 

GO TO THE APPLICABLE DTC INSPECTION. 

1. Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2018 - 08/2019] , or refer to DIAGNOSTIC TROUBLE CODE CHART [08/2019 - ]

1. If the malfunction recurs, replace the ECM.

   Refer to REMOVAL [07/2015 - ]

2. Go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Replace the control valve body.

   Refer to REMOVAL [07/2015 - ]

2. Then go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. CAN communication line can be considered the cause.
   1. Repair or replace the wiring harness between ECM and TCM.
2. Then go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Then go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Then go to the next step.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  11