NUMBER:
GROUP:
DATE:

21-006-17 REV. B
21 - Transmission and
Transfer Case
July 29, 2017

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 SERVICE BULLETIN 21-006-17 REV. A, DATED JUNE 17, 2017,
WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED
WITH **ASTERISKS** AND INCLUDE CONVERTING THE BULLETIN TO AN RRT, INCLUDING
ADDITIONAL STEP, INSPECTION LOP AND FAILURE CODE STATEMENT.
**THIS SERVICE BULLETIN IS ALSO BEING RELEASED AS RAPID RESPONSE
TRANSMITTAL (RRT) 17-070. ALL APPLICABLE UN-SOLD RRT VIN’s HAVE BEEN LOADED.
TO VERIFY THAT THIS RRT SERVICE ACTION IS APPLICABLE TO THE UN-SOLD
VEHICLE, USE VIP OR PERFORM A VIN SEARCH IN TECHCONNECT.**
FOR HELP WITH USING wiTECH FOR ECU FLASH REPROGRAMMING, CLICK ON THE
APPLICATION’S “HELP” TAB.
THE wiTECH SOFTWARE IS REQUIRED TO BE AT THE LATEST RELEASE BEFORE
PERFORMING THIS PROCEDURE.
SUBJECT:
Flash: Transmission Diagnostic and Shift Enhancements
OVERVIEW:
This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest
available software.
MODELS:
2017

(KL)

Jeep Cherokee

NOTE: This bulletin applies to vehicles within the following markets/countries: NAFTA.
NOTE: This bulletin applies to vehicles built on or before June 15, 2017 (MDH 0615XX)
equipped with either:
• 2.4L Engine (Sales Code ED6 or ED8) or a 3.2L V6 24V VVT Engine W/ESS (Sales Code
EHK) equipped with:
• 9-SPD 948TE FWD/AWD Automatic Transmission (Sales Code DFH).
• 9-SPD 948TE 4WD Automatic Transmission (Sales Code DFJ).

21-006-17 REV. B

-2-

SYMPTOM/CONDITION:
Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further
investigation the technician may find that one or more of the following Diagnostic Trouble Codes
(DTCs) have been set:
•
•
•
•

P0810-00 - Clutch Position Control Error - (Sales Codes EHK).
P0887-00 - TCM Power Control Circuit High.
U1424-00 - Implausible Engine Torque Signal Received.
P1DCD-00 - TCM Monitoring Processor Performance Multiple Clutches Locked Up.

Some customers may experience one or more of the following conditions:
• During a limp mode condition, the transmission remains in a fixed gear.
• 5-4 downshift hesitation.
• A longer than normal delay during a shift from reverse to drive selection.
In addition the following enhancements are included:
• Calibration update for Engine Stop Start (ESS) to allow the engine to remain running during a
brief stop.
• 2-1 and 3-2 coast down tip-in.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all related systems are functioning as designed. If 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 RRT VIN list, perform the repair. For all other customers
that describe the symptom/condition listed above or if the technician finds the DTC, perform the
Repair Procedure.
REPAIR PROCEDURE:
NOTE: The Powertrain Control Module (PCM) must be updated to the latest available
software at the conclusion of this repair procedure. Refer to all applicable published
service bulletins for detailed repair procedures and labor times regarding updating
the PCM software.
NOTE: Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do
not allow the charging voltage to climb above 13.5 volts during the flash process.
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
1. **Does the TCM control module have the latest software already installed?
• YES>>> This bulletin has been completed, use inspect LOP (18-19-05-GC) to close the
active RRT.
• NO>>> Proceed to Step 2.**
2. Reprogram the TCM with the latest software. Detailed instructions for flashing control modules
using the wiTECH Diagnostic Application are available by selecting the application’s “HELP”
tab.
3. Clear any DTCs that may have been set in any module due to reprogramming. The wiTECH
application will automatically present all DTCs after the flash and allows them to be cleared.
4. Verify the Powertrain Control Module (PCM) is programmed with the latest available software.
Refer to all applicable published service bulletins for detailed repair procedures and labor times
regarding updating the PCM software.

-3-

21-006-17 REV. B

POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:

Description

Skill Category

Amount

**18-19-05-GC

Module, Transmission Control
(TCM) - Inspect
(0 - Introduction)

2 - Automatic Transmission

0.2 Hrs**

18-19-05-FL

Module, Transmission Control
(TCM) - Reprogram
(0 - Introduction)

2 - Automatic Transmission

0.3 Hrs.

NOTE: The expected completion time for the flash download portion of this procedure is
approximately 5 minutes. Actual flash download times may be affected by vehicle
connection and network capabilities.
FAILURE CODE:
**The dealer must choose which failure code to use depending on if this is a Rapid
Response Transmittal (RRT) or Service Bulletin.
• If the customer’s concern matches the SYMPTOM/CONDITION identified in the Service
Bulletin, failure code CC is to be used. When utilizing this failure code, the 3C’s must be
supplied.
• The failure code “RF” (Required Flash) can no longer be used on Service Bulletin flashes. The
“RF” failure code can only be used on RRT.
• 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 RRT.**
CC

Customer Concern

RF

Required Flash