NUMBER:
GROUP:
DATE:

21-032-22 REV. A
21 - Transmission and
Transfer Case
November 2, 2022

This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.

This bulletin supersedes Technical Service Bulletin (TSB) 21-032-22, date of issue October
22, 2022, which should be removed from your files. All revisions are highlighted with
**asterisks** and include turning it into an RSU and a new clean date.
**This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update
(RSU) 22-209, date of issue November 02, 2022. All applicable Un-Sold RSU VINs have been
loaded. To verify this RSU service action is applicable to the Un-Sold vehicle, use VIP or
perform a VIN search in DealerCONNECT/Service Library. This RSU will expire 18
months after the date of issue.**
SUBJECT:
Harsh Transition From Electric to Hybrid Mode
OVERVIEW:
This bulletin involves performing a transmission quick learn with wiTECH.
MODELS:
2022 - 2023

(WL)

Jeep Grand Cherokee

NOTE: This bulletin applies to vehicles within the following markets/countries: North
America, South America, India/Asia Pacific, Middle East/Africa, and Enlarged Europe.
NOTE: This bulletin applies to vehicles built on or before **November 10, 2022 (MDH
1110XX)** equipped with the 2.0L I4 DOHC DI Turbo PHEV Engine (Sales Code ECX)
and 8-Speed Auto 8P75PH PHEV Transmission (Sales Code DFY).
SYMPTOM/CONDITION:
Customers may experience one or more of the following:
• Harsh Shift
• Abrupt or harsh transition from Electric Vehicle to Hybrid Engine mode.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
DealerCONNECT/Service Library, verify all related systems are functioning as designed. If
Diagnostic Trouble Codes (DTCs) or symptom conditions, other than the ones listed above are
present, record the issues on the repair order and repair as necessary before proceeding further
with this bulletin.
If a customer’s VIN is listed in VIP or your RSU VIN list, perform the repair. If any vehicle not on the
VIN list exhibits the symptom/condition, perform the repair.

21-032-22 REV. A

-2-

REPAIR PROCEDURE:
NOTE: The transmission oil temperature must be above 60° C (140° F) and transmission oil
level must be full before performing the adaptation procedure.
NOTE: The High Voltage (HV) battery State Of Charge (SOC) must be always above 20% and
below 80% while performing this procedure. If the HV battery is below 20%, charge
the battery before continuing.
1. Does the vehicle have more than 500 miles on the odometer?
• YES>>> This bulletin is complete. Use (18-19-05-RR) to close this RSU. Perform normal
diagnostics.
• NO>>> Proceed to Step 2.
2. Using wiTECH ensure the transmission temp is above 60° C (140° F)
NOTE: If the HV battery voltage is over 80% drive the vehicle in “ELECTRIC” mode until the
voltage drops under 80%. This will also aid in warming up the transmission to proper
operating temp.
3. Check the HV battery State of Charge (SOC) is above 20% and below 80%. This can be found
in the Instrument Panel Cluster (IPC).
4. Using wiTECH create a vehicle scan report.
5. Ensure the vehicle is in HYBRID mode on the left side switch bank.
6. Using wiTECH, record the K0 Filling Counter and K0 Fast filling Counter. This can be found in
Transmission Control Module (TCM) Misc Functions in PHEV Quicklearn, Read Adaptives
(Fig. 1) .

Fig. 1
PHEV Quicklearn

7. Now select “Learn K0 Clutch”. Follow prompts in wiTECH to complete the Learn K0 Clutch
procedure.
8. Upon successful completion of the Learn K0 Clutch procedure, verify the new K0 Filling
Counter and K0 Fast filling Counter are both 1. Record all four K0 values found in TCM
Misc Functions > PHEV Quicklearn > Read Adaptives.
9. Clear all DTCs that may have been set.

-3-

21-032-22 REV. A

NOTE: Before the test drive go into the radio E-Hybrid pages, go to the e-Save page and
verify (Battery Save( is selected.
10. Test drive the vehicle to ensure the customer concerns have been corrected. Put the vehicle
into “e-save” mode, engine should not be running when starting the test drive. Drive until the
engine begins to run.
11. Have the customer concerns be corrected?
• YES>>> This bulletin has been completed return the vehicle to the customer.
• NO>>> Further Diagnostic will be needed.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No:

Description

Skill Category

Amount

18-19-05-RR

Module, Transmission Control
(TCM) - Inspect

2 - Automatic Transmission

0.2 Hrs.

18-19-05-RS

Module, Transmission Control
(TCM) - Inspect and Perform
Quicklearn
(0 - Introduction)

2 - Automatic Transmission

0.9 Hrs.

FAILURE CODE:
The dealer must choose which failure code to use depending on if this is a Rapid Service
Update (RSU) or Technical Service Bulletin.
• The “RF” failure code is required for essential module flash/reprogramming and can only be
used after confirmation that the VIN is included on the RSU.
• The failure code “RF” (Required Flash) can no longer be used on Technical Service Bulletin
flashes. The “RF” failure code must be used on an RSU.
• If the customer’s concern matches the SYMPTOM/CONDITION identified in the Technical
Service Bulletin, failure code CC is to be used. When utilizing this failure code, the 3C’s must
be supplied.
RF

Required Flash - RSU

CC

Customer Concern