NUMBER:
GROUP:
DATE:

21-033-15
Transmission and
Transfer Case
May 20, 2015

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 21-027-14 REV A, DATED
NOVEMBER 12, 2014, WHICH SHOULD BE REMOVED FROM YOUR FILES. THIS IS A
COMPLETE REVISION AND NO ASTERISKS HAVE BEEN USED TO HIGHLIGHT
REVISIONS.
HELP USING THE wiTECH DIAGNOSTIC APPLICATION FOR FLASHING AN ECU IS
AVAILABLE BY SELECTING “HELP” THEN “HELP CONTENTS” AT THE TOP OF
THE wiTECH DIAGNOSTIC APPLICATION WINDOW.
THE wiTECH SOFTWARE LEVEL MUST BE AT 15.04 OR HIGHER TO PERFORM THIS
PROCEDURE.
SUBJECT:
Flash: Transmission Shift And Drivability Enhancements
OVERVIEW:
This bulletin involves reprogramming the Transmission Control Module (TCM) with the
latest available software followed by a drive validation.
MODELS:
2014

(KL)

Jeep Cherokee (International only)

NOTE: This bulletin applies to vehicles equipped with a 2.0L Turbo Diesel engine
(Sales Code EBT) and a 948TE 9-speed automatic transmission (Sales Code
DFH or DFJ).
SYMPTOM/CONDITION:
The following software enhancement, for the 948TE 9-speed transmission, is being
released to improve diagnostics for the following Diagnostic Trouble Codes (DTCs):
•
•
•
•
•
•

P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance
P0887 - TCM Power Control Circuit High
P1720 - Output Speed Sensor-Wheel Speed Rationality
P1D98 - Incorrect Gear Ratio Clutch B or D Defective
P215C - Output Shaft Speed Wheel Speed Correlation
U0401 - Implausible Data Received From ECM-PCM

The software also enables DTC P07A7 - Transmission Friction Element C Stuck On to set
in the case of a dislodged C-clutch snap-ring.

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DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in
TechCONNECT, verify all engine 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 the customer describes the symptom/condition listed above or if the technician finds the
DTC, perform the Repair Procedure.
REPAIR PROCEDURE:
CAUTION: The Engine Control Module (ECM) 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 ECM 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. Reprogram the TCM with the latest available software. Detailed instructions for
flashing control modules using the wiTECH Diagnostic Application are available by
selecting the “HELP” tab on the upper portion of the wiTECH window, then “HELP
CONTENTS.” This will open the Welcome to wiTECH Help screen where help topics
can be selected.
2. Using wiTECH, perform the TCM “VIN Verification” routine located in the TCM “Misc
Functions” menu and follow the on-screen prompts.
3. Using wiTECH, perform a “PROXI Configuration Alignment” routine located in the
“Vehicle Preparations” tab on the main vehicle view screen.
4. Clear any DTCs that may have been set in any modules due to reprogramming. The
wiTECH application will automatically present all DTCs after the flash and allow the
them to be cleared.
5. Turn the ignition off, disconnect the wiTECH, open and close the door and let vehicle
sit for 1 minute.
NOTE: Before proceeding to the next step, verify the ECM is programmed with the
latest available software. Refer to all applicable published service bulletins
for detailed repair procedures and labor times regarding updating the ECM
software.
NOTE: Verify that the Clutch Filling Counters and Fast Filling Counters were not
reset to 0 (zero) after flashing using Wi-Tech. If they have reset then 9 Speed
Adaptation Drive Learn will have to be performed at the conclusion of this
service bulletin.

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21-033-15

6. Perform a Transmission Drive Verification Test by performing the following steps:
a. Start the vehicle and allow the coolant temperature to reach between 35°C and
105°C (95°F and 221°F).
b. Allow the transmission temperature to reach between 50°C and 115°C (122°F and
239°F).
c. Ensure the vehicle is below an attitude of 2.4 km (8000 ft.).
d. With the vehicle located in a suitable area and traveling in a straight line, bring the
vehicle to a minimum of 48 kph (30 mph) (5th gear) and perform a 0 throttle
coasting deceleration until the transmission downshifts from 5th gear to 4th gear.
e. Repeat this coasting downshift 10 times.
7. Did the TCM set DTC P07A7 as active?
a. Yes>>> Refer to all current, normal diagnostics published in
DealerCONNECT/TechCONNECT regarding the DTC P07A7 and repair as
necessary following normal warranty repair guidelines.
b. No>>> If all of the Clutch Filling Counters and Fast Filling Counters were reset to 0
(zero) after flashing, the 9 Speed Adaptation Drive Learn must be performed. Refer
to all applicable published service bulletins regarding the 9 Speed Adaptation Drive
Learn for detailed repair procedures and labor times. If they have not reset, then no
further action is required.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
18-19-05-BC

Description

Skill Category

Module, Transmission Control (TCM) - 21 - Automatic
Reprogram (1 - Semi-Skilled)
Transmission

Amount
1.1 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. If the customer came in with an
issue and the dealer found updated software to correct that issue, use failure code
CC, for all other use failure code RF.
•
•

If the customer’s concern matches the SYMPTOM/CONDITION identified in the
Service Bulletin, than failure code CC is to be used.
If an available flash is completed while addressing a different customer concern,
failure code RF is to be used.

CC

Customer Concern

RF

Routine Flash