Flash: Transmission Control Module (TCM) Updates (21-051-18)

WARNING: This page is about the Grand Cherokee Limited, 3.0L Eng VIN M, AWD, which is a different variant/trim than selected.

Publication date: 2018-12-05
Reference number: 21-051-18
Supersedes refnos: 21-009-17, 21-009-17 REV. A, 21-009-17 REV. B, 21-009-17 REV. D, 21-009-17 REV. E

FLASH: TRANSMISSION CONTROL MODULE (TCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 21-051-18, Date of Issue: December 5, 2018

CHRYSLER:	2017 Dodge Durango (WD), Jeep Grand Cherokee (WK)
GROUP:	21 - Transmission and Transfer Case

Superceded Bulletin(s): 21-009-17 REV.E, Date of Issue: September 07, 2017

NOTE: THIS BULLETIN SUPERSEDES SERVICE BULLETIN 21-009-17 REV. E, DATED SEPTEMBER 07, 2017, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDES ADDITIONAL DIAGNOSTIC TROUBLE CODES (DTCs), UPDATED BUILD DATE AND LOP.

SUBJECT

Flash: Transmission Control Module (TCM) Updates d.H

OVERVIEW

This bulletin involves reprogramming the TCM with the latest available software.

MODELS

MODELS CHART

2017	(WD)	Dodge Durango
2017	(WK)	Jeep Grand Cherokee

NOTE: This bulletin applies to vehicles within the following markets/countries: NAFTA, LATAM, EMEA and APAC.

NOTE: **This bulletin applies to WK vehicles equipped with a 3.6L V6 24V VVT Engine UPG I W/ESS (Sales Code ERC) and a 8-SPD Auto 850RE (Sales Code DFT).**

NOTE: This bulletin applies to WD vehicles built on or after May 02, 2016 (MDH 0502XX) and on or before June 06, 2017 (MDH 0606XX) equipped with a 5.7L V8 MDS VVT Engine (Sales Code EZH) and a 8-SPD Auto 8HP70 Trans (Sales Code DFK).

NOTE: This bulletin applies to WK vehicles built on or after May 02, 2016 (MDH 0502XX) and on or before June 06, 2017 (MDH 0606XX) equipped with a 5.7L V8 MDS VVT Engine (Sales Code EZH) and a 8-SPD Auto 8HP70 Trans (Sales Code DFK).

NOTE: This bulletin applies to WK vehicles built on or after May 12, 2016 (MDH 0512XX) and on or before January 25, 2017 (MDH 0125XX) equipped with a 3.0L Gasoline V6 24V VVT Engine W/ESS (Sales Code EHW) with a 845RE 8 Speed Automatic Transmission (Sales Code DFL).

NOTE: This bulletin applies to WK vehicles built on or after May 12, 2016 (MDH 0512XX) and on or before January 25, 2017 (MDH 0125XX) equipped with a 3.6L Engine (Sales Code ERC) and an 845RE 8 Speed Automatic Transmission (Sales Code DFL).

NOTE: This bulletin applies to WD vehicles built on or after May 12, 2016 (MDH 0512XX) and on or before January 25, 2017 (MDH 0125XX) equipped with a 3.6L V6 24V VVT Engine UPG I W/ESS (Sales Code ERC) and a 845RE 8 Speed Automatic Transmission (Sales Code DFL).

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 DTCs have been set:

**P0979-00 - Shift Solenoid 3 Control Circuit Low (Sales Code DFT only).
P0219-00 - Engine Overspeed Condition (Sales Code DFT only).**
U0401-00 - Implausible Data Received From ECM/PCM (Sales Code ERC only).

In addition, customers may comment on one or more of the following:

Poor shift quality on coast-down shifts (bumps) (Sales Code EZH only) .
During an engine limp mode condition, the transmission remains in a fixed gear.

The following software enhancements are also available:

Start/Stop quality enhancement (WK with Sales Code ERC only) .
Transmission shift quality improvements.

DIAGNOSIS

Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in Service Library/TechCONNECT, verify all related systems are functioning as designed. If DTCs or symptom conditions, other than the ones listed 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, 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.

Reprogram the TCM 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.
Clear the shift adaptives in the TCM's memory.
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.
Perform quick learn procedure. Refer to the detailed service procedures available in DealerCONNECT> TechCONNECT under: Service Info> 28 DTC Based Diagnostics/Module, Transmission Control (TCM), 8HP70/Standard Procedure.
Verify the 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.

POLICY

Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

TIME ALLOWANCE CHART

Labor Operation No:	Description	Skill Category	Amount
**18-19-05-KQ	Module, Transmission Control (TCM) -Reprogram (0 - Introduction)	2 - Automatic Transmission	0.5 Hrs.**

NOTE: The expected completion time for the flash download portion of this procedure is approximately 4 minutes. Actual flash download times may be affected by vehicle connection and network capabilities.

FAILURE CODE

The dealer must use failure code CC with this 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 (customer's concern, cause and correction) must be provided for processing Service Bulletin flash/reprogramming conditions.

FAILURE CODE CHART

CC	Customer Concern