21-022-14

NUMBER:
GROUP:
DATE:
21-022-14
Transmission and
Transfer Case
July 10, 2014
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, ele ctronic, mechanical, photocopying, or otherwise, without written permission of Chrysler Group LLC.
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 RELEASE 14.03 OR HIGHER TO
PERFORM THIS PROCEDURE.
SUBJECT:
4WD Lamp Illuminated and Diagnostic Trouble Code C140F Active in Final Drive Control
Modules (FDCM) Memory
OVERVIEW:
This bulletin involves verifying FDCM software level and then flash reprogramming of the
FDCM with new software.
MODELS:
2005 - 2010
WH/WK
Grand Cherokee
2006 - 2010
XH/XK
Commander
NOTE: This bulletin applies to vehicles that have had Recall N23 performed.
SYMPTOM/CONDITION:
Customers may indicate that the "Service 4WD" indicator in the instrument cluster is
illuminated. They may also indicate that the transfer case will not shift from 4WD High ,
4WD Low, and/or Neutral once the lamp is illuminated.
Further investigation identifies that a Diagnostic Trouble Code C140F is stored or active in
the Final Drive Control Modules (FDCM) Memory
DIAGNOSIS:
If the customer describes the symptom , perform the Repair Procedure .
REPAIR PROCEDURE:
1. Using the wiTECH™, record the FDCM software number.
2. Was the FDCM software number 56044129AP, 56044199AP, or 68235713AB?
21-022-14
-2-
a. YES>>> The FDCM software is at the latest level. Please refer to the standard
diagnostic information for C140F . Refer to
DealerCONNECT>Service>TechCONNECT>Service lnfo>28 - OTC-Based
Diagnostics>MODULE , Final Drive Control (FDCM)>Diagnosis and
Testing>C140F-TRANSFER CASE RANGE POSITION SENSOR ERRATIC
PERFORMANCE for additional information .
b. NO>>>>Proceed to the next step .
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.
Reprogram the FDCM with the latest software. 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 .
4. Clear any DTC's that may have been set in other modules due to reprogramming. The
wiTECH™ application will automatically present all DTC's after the flash and allow the
tech to clear them .
5. Turn the ignition key OFF making sure that the key remains OFF for at least 5
seconds. Then cycle the ignition key ON making sure that the key remains ON for at
least 5 seconds. Perform a total of three ignition key OFF to ON cycles making sure
that there is at least a 5 second pause between each key cycle.
6. Using the wiTECH™ , verify that OTC C140F is not active in the FDCM 's memory.
7. Is OTC C140F active in the FDCM 's memory?
a. YES>>>Please refer to the standard diagnostic information for C140F . Refer to
DealerCONNECT>Service>TechCONNECT>Service lnfo>28 - OTC-Based
Diagnostics>MODULE , Final Drive Control (FDCM)>Diagnosis and
Testing>C140F-TRANSFER CASE RANGE POSITION SENSOR ERRATIC
PERFORMANCE for additional information.
b. NO>>>Repair is complete .
3.
NOTE: If C140F is still active, please ensure that all harness and connections into
the FDCM and into the Transfer Case Actuator are free from any bent, loose,
or corroded terminals and repair as necessary.
POLICY:
Reimbursable within the provisions of the warranty .
TIME ALLOWANCE:
Labor Operation
No:
18-19-07-9E
Description
Module, Final Drive Control (FDCM) Inspect and Reprogram
(1 - Semi-Skilled)
FAILURE CODE:
IFlash Module
Skill Category
3 - Driveline
Amount
0.2 Hrs .