Flash: Powertrain Control Module (Pcm) Updates (18-056-21)

WARNING: This page is about the Pacifica Hybrid Limited, which is a different variant/trim than selected.

Publication date: 2024-03-27
Reference number: 18-056-21
Supersedes refnos: 18-018-24, 18-025-24

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-025-24, Date of Issue: March 27, 2024

CHRYSLER:	2020 (RU) Chrysler Pacifica
GROUP:	18 - Vehicle Performance

Superceded Bulletin(s): 18-056-21, Date of Issue: June 11, 2021

VEHICLES AFFECTED

2020 (RU) Chrysler Pacifica

This bulletin applies to vehicles equipped with one of the following:

3.6L V6 24V VVT Engine Upg I W/ESS (Sales Code ERC)
3.6L V6 24V VVT Engine (Sales Code ERF)

CUSTOMER SYMPTOM

Customers may experience one or more of the following:

Battery depletes.
Rough shifting while driving.
Vehicle cluster displays "Shift to Park, then desired gear" while coasting to a stop <8 kmh (<5 mph). Once the vehicle is shifted to park and then to the desired gear, the vehicle operates as intended.

CAUSE

PCM software

NOTE: This bulletin supersedes Technical Service Bulletin (TSB) 18-056-21, date of issue June 11, 2021, which should be removed from your files. All revisions are highlighted with **asterisks** and include a new TSB number.

REPAIR SUMMARY

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

CLAIMS DATA

CLAIMS INFORMATION

Labor Operation No:	Labor Description	Skill Category	Labor Time
18-19-06-HV	Module, Powertrain Control (PCM) - Reprogram (0 - Introduction)	1 - Engine Repair And Performance	0.2 Hrs.
Failure code	CC	Customer Concern

The dealer must use failure code CC with this Technical Service Bulletin.

If the customer's concern matches the SYMPTOM 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 Technical Service Bulletin flash/reprogramming conditions.

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 any of the symptoms listed above in the customer symptom section, perform the REPAIR PROCEDURE .

SPECIAL TOOLS/EQUIPMENT

SPECIAL TOOLS INFORMATION

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, 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 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.

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.