Flash: Transmission Control Module (TCM) Updates (2101121)

WARNING: This page is about the Grand Cherokee 80th Anniversary Edition, 3.6L Eng VIN G, AWD, which is a different variant/trim than selected.

Publication date: 2021-03-24
Reference number: 2101121

FLASH: TRANSMISSION CONTROL MODULE (TCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 2101121, Date of Issue: March 24, 2021

CHRYSLER:	2021 Jeep Grand Cherokee (WK)
GROUP:	21 - Transmission and Transfer Case

OVERVIEW

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

MODELS

MODELS CHART

2021

(WK)

Jeep Grand Cherokee

NOTE: This bulletin applies to vehicles within the following markets/countries: North America.

NOTE: This bulletin applies to vehicles built on or before February 04, 2021 (MDH 0204XX), equipped with a 3.0L V6 Turbo Diesel Engine (Sales Code EXF) and 8-Speed Automatic 8HP75 Transmission (Sales Code DFV).

SYMPTOM/CONDITION

Customers may experience the following on a vehicle with less than 64 km (40 miles) on the odometer:

A Malfunction Indicator Lamp (MIL) event or failure with no Diagnostic Trouble Codes (DTCs) and the vehicle has less than 40 miles on the odometer indicates it is likely the vehicle has experienced an unintentional code clear event.

NOTE: Do not use this software update if vehicle odometer has over 64 km (40 miles).

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 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: 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 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 them to be cleared.

POLICY

Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

TIME ALLOWANCE CHART

Labor Operation No:	Description	Skill Category	Amount
18-19-05-PW	Module, Transmission Control (TCM) - Reprogram (0 - Introduction)	2 - Automatic Transmission	0.2 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