Technical Service Bulletin (TSB)
Flash: Drivetrain Control Module (DTCM) Updates
REFERENCE:

TSB: 08-113-23
GROUP 08 - Electrical

VEHICLES
AFFECTED:

2022 (WL) Jeep Grand Cherokee
This bulletin applies to vehicles equipped with Quadra-Trac II (R)
4WD System (Sales Code DKA).

Date:

May 3, 2023

REVISION: –
MARKET APPLICABILITY:
HNA
HIAP
HEE

HMEA

HSA

HCH

CUSTOMER
SYMPTOM:

Customers may experience a Malfunction Indicator Lamp (MIL) or warning lamp illumination. Upon
further investigation the technician may find that the multiple Diagnostic Trouble Codes (DTCs) have
been set:
• C1403-29 - Transfer Case Range Position Sensor-Signal Invalid.
• C14AA-62 - Transfer Case Motor Position Sensor Supply-Signal Compare Failure.

CAUSE:

DTCM software.

This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU)
23-123, date of issue May 03, 2023. All applicable RSU VINs have been loaded. To verify this RSU
service action is applicable to the vehicle, use VIP or perform a VIN search in DealerCONNECT/
Service Library. All repairs are reimbursable within the provisions of warranty. This RSU will expire 18
months after the date of issue.
REPAIR SUMMARY:
This bulletin involves reprogramming the DTCM with the latest software available.
CLAIMS DATA:
Labor Operation No:

Labor Description

Skill Category

Labor Time

18-19-07-AG

Module, Drivetrain Con6 - Electrical and Body
trol (DTCM) - Inspect s/w Systems
Level (Sales Code DKA
Only)
(0 - Introduction)

0.2 Hrs.

18-19-07-AH

Module, Drivetrain Con6 - Electrical and Body
trol (DTCM) - Inspect and Systems
Reprogram (Sales Code
DKA Only)
(0 - Introduction)

0.3 Hrs.

Failure Code

RF

Required Flash

CC

Customer Concern

08-113-23

-2-

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.
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 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 any of the symptom listed above in the customer symptom section, perform the Repair Procedure.
SPECIAL TOOLS/EQUIPMENT:
Description

Ref. No.

Notes

wiTECH or Equivalent

–

–

REPAIR PROCEDURE:
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, check DTCM part number. If the flash part number
can be read, the flash should be restarted.
CAUTION! The supplier of this DTCM ECU has determined this DTCM may not be abort recoverable if
the flash process is interrupted or aborted during the flash reprogramming process. This
is an DTCM ECU issue and should not be mistaken for a wiTECH tool issue.
1. Is the vehicle on the RSU VIN list?
• YES >>> Proceed to Step 2.
• NO >>> Proceed to Step 3.
2. Does the DTCM have the latest software already installed?
• YES >>> This bulletin has been completed. Use inspect LOP (18-19-07-AG) to close the active RSU.
• NO >>> Proceed to Step 3.
3. Using wiTECH create a vehicle scan report.
4. With the engine running, run the DTCM routine “DTCM Replacement with Value Transfer” using the
option “Save values from the Original DTCM”. Choose the “2 - Speed Transfer Case”.
NOTE: Is it not required to run the DTCM routine “DTCM Replacement with Value Transfer using
the option “Write values to the New DTCM( after reprogramming.
5. Reprogram the DTCM with the latest available software. Detailed instructions for flashing control
modules using the wiTECH Diagnostic Application are available by selecting the application’s
“HELP” tab.
6. Perform a sleep cycle to ensure the module is updated correctly. Make sure all accessories are off,
place the ignition in the off position and close all doors. The key fob must be at least 6.0 m (20
ft.) from the vehicle, while monitoring the PRNDL lights to ensure they have turned off, this
will indicate that the bus is in a sleep cycle.
NOTE: The wiTECH tool must be removed from the OBD port.

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08-113-23

7. Clear all DTCs that may have been set in any module due to reprogramming. The wiTECH application
will automatically present all DTCs after the flash and allow them to be cleared. This bulletin has been
completed.
POLICY:
Reimbursable within the provisions of the warranty.
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.