Flash: Powertrain Control Module (Pcm) Updates (18-074-19)

WARNING: This page is about the Grand Cherokee Altitude, AWD, which is a different variant/trim than selected.

Publication date: 2022-02-05
Reference number: 18-074-19
Supersedes refnos: 18-024-22

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-024-22, Date of Issue: February 05, 2022

CHRYSLER:	2020 (WK) Jeep Grand Cherokee
GROUP:	18 - Vehicle Performance

Superceded Bulletin(s): 18-074-19, Date of Issue: October 23, 2019

NOTE: This bulletin supersedes Technical Service Bulletin (TSB) 18-074-19, date of issue October 23, 2019, which should be removed from your files. All revisions are highlighted with **asterisks** and include additional symptoms/conditions and LOP.

OVERVIEW

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

MODELS

MODELS CHART

2020

(WK)

Jeep Grand Cherokee

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

NOTE: This bulletin applies to vehicles built equipped with the 3.6L V6 24V VVT Engine UPG 1 W/ESS (Sales Code ERC).

SYMPTOM/CONDITION

The customer may comment on the following condition:

**Audible fuel pump noise during engine stop/start engine stop.**
Perceive rough and/or erratic transmission shifting between gears during normal drive cycles.

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 Diagnostic Trouble Codes (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, perform the Repair Procedure.

REPAIR PROCEDURE

NOTE: The Transmission Control Module (TCM) 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 TCM 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 PCM with the latest 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 module due to reprogramming. The wiTECH application will automatically present all DTCs after the flash and allows them to be cleared.
Verify the TCM is programmed with the latest available software. Refer to all applicable published service bulletins for detailed repair procedures and labor times regarding updating the TCM software.

POLICY

Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

TIME ALLOWANCE CHART

Labor Operation No:	Description	Skill Category	Amount
**18-19-06-EY	Module, Powertrain Control (PCM) - Reprogram (0 - Introduction)	1 - Engine Repair and Performance	0.2 Hrs.**

NOTE: The expected completion time for the flash download portion of this procedure is approximately 2 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 Technical Service Bulletin.

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 (customer's concern, cause and correction) must be provided for processing Service Bulletin flash/reprogramming conditions.

FAILURE CODE CHART

CC	Customer Concern