A/T - Shift Shock Shifting From P to R or N to R
Bulletin No:05-004/12
Last Issued:
11/1/2012
Subject:
SHIFT SHOCK
BULLETIN NOTE
*^ This bulletin supercedes the previous bulletin 05-004/12 issued on 08/08/12. The APPLICABLE MODEL(S)/VINS have been revised.*
*^ Changes are noted by the black bar in margin, and asterisks.*
APPLICABLE MODEL(S)/VINS
DESCRIPTION
Some vehicles may experience an excessive shift shock at one or more of the following conditions:
^ When shifting from P to R position or N to R position.
^ When the transmission shifts immediately after starting to move (in D position).
^ When the transmission shifts at cruising speed (in D position).
The initial learning may not have been completed at the time of vehicle production. To correct the problem, one or more learning procedures may need to be performed.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Verify customer concern.
2. Follow the Diagnosis Flowchart on the following page and perform the N-R and/or Slip Learning Procedure.
3. Verify repair.
N-R Learning Procedure
1. Verify the ATF temperature reached 60°C (140°F) or over.
2. Shift the selector lever from N to R position and wait for 5 seconds
3. Shift the selector lever from R to N position and wait for 5 seconds
4. Repeat steps 2 to 3 ten times.
Slip Learning Procedure
1. Verify the ATF temperature reached 20°C (68°F) or over (*1).
2. Drive the vehicle until upshifting from 1St to 2nd gear occurs at each of the following accelerator pedal position (APP) percentages: 20%, 40%, 60%. Monitor the APP PID using M-MDS and come to a complete stop before moving to the next one.
NOTE:
It does not matter if the vehicle shifts from 2nd to 3rd, just as long as the shift from 1st to 2nd occurs.
3. Repeat step 2 three times, then do one more at 20%.
(*1) For the following vehicles, perform Slip Learning after the ATF temperature reaches 80°C (176°F) or over.
Diagnosis Flowchart
WARRANTY INFORMATION
Disclaimer