Technical Service Bulletin (TSB)
Flash: Powertrain Control Module (PCM) Updates
REFERENCE:

TSB: 18-013-23 REV. B
GROUP 18 - Vehicle Performance

VEHICLES
AFFECTED:

2022 (WL) Jeep Grand Cherokee
This bulletin applies to vehicles equipped with a 2.0L I4 DOHC DI
Turbo PHEV Engine (Sales Code ECX).

Date:

September 1,
2023

REVISION: 18-013-23 REV. A
MARKET APPLICABILITY:
HNA
HMEA
HSA

HIAP

HEE

HCH

CUSTOMER
SYMPTOM:

Customers may experience one or more of the following:
• Engine must be started twice to achieve drive ready (at low temperatures around -30°C, -22°F)
when the vehicle was entered and started quickly.
• “Performance Limited, Service Fuel System” popup while driving.
• Unable to enter electric mode driving while Fuel Oil Refresh Mode (FORM) is active.

CAUSE:

PCM Software

This bulletin supersedes Technical Service Bulletin (TSB) 18-013-23 REV. A, date of issue August 29,
2023, which should be removed from your files. No **asterisks** were used since this Technical
Service Bulletin (TSB) is converting back to prior REV until later when all the software is ready for
release.
REPAIR SUMMARY:
This bulletin involves reprogramming the PCM with the latest available software.
NOTE: Additional module flashes are required for this update to be effective, the following modules
are all to be updated along with this HCP and AHCP update:
• Transmission Control Module (TCM).
• Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP) also known as
Power Inverter Module (PIM) module.
CLAIMS DATA:
Labor Operation No:

Labor Description

Skill Category

Labor Time

18-19-06-GR

Module, Powertrain Control (PCM) - Reprogram
(0 - Introduction)

1 - Engine Repair and
Performance

0.5 Hrs.

Failure code

CC

Customer Concern

RELATED TIME ALLOWANCE:
Labor Operation No:

Description

Skill Category

Amount

18-19-87-51

5 Minute Power down After Disabling HV Battery Contactors
(0 - Introduction)

6 - Electrical and
Body Systems

0.2 Hrs.

NOTE: The related LOP for high voltage power contactors disable and enable can only be claimed
one time when updating these additional modules at the same dealership visit:
• Hybrid Control Processor (HCP), Auxiliary Hybrid Control Processor (AHCP) also known as the
Power Inverter Module (PIM).

18-013-23 REV. B
•
•
•
•
The

-2-

Transmission Control Module (TCM).
Powertrain Control Module (PCM).
Integrated Dual Charging Module (IDCM).
Battery Pack Control Module (BPCM).
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 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 a symptom/condition listed above, perform the repair procedure.
SPECIAL TOOLS/EQUIPMENT:
Description

Ref. No.

Notes

wiTECH or Equivalent

–

–

REPAIR PROCEDURE:
NOTE: The HCP, AHCP and TCM must be updated to the latest available software at the conclusion
of this repair procedure. Refer to all applicable published technical service bulletins for
detailed repair procedures and labor times regarding updating the HCP, AHCP and TCM
software.
CAUTION! Failure to update HCP, AHCP and TCM modules following an PCM software update may
result in vehicle malfunctions.
NOTE: Install a battery charger to maintain a 12 volt system voltage.
NOTE: If this flash process is interrupted/aborted, the flash should be restarted.
WARNING!
• Before performing the software reprogramming, it is necessary to make the vehicle safe.
• When performing repairs that directly involve or imply possible contact with live high voltage
components/systems, the technician must ensure that the power supply of the high-voltage
system is disconnected throughout the operation.
• Only specifically trained technicians qualified to perform repairs on vehicles with high voltage
systems under current national laws/regulations are authorized to work on the vehicle.
• Before performing any diagnostic repair work on the vehicle, carefully read and comply with the
general instructions for working safely on hybrid/electric vehicles and use suitable general
equipment and Personal Protective Equipment (PPE).
1. Disable HV battery contactors with wiTECH - Go to the Misc Functions tab --> Select Disable HV Battery
Contactors --> then follow the wiTECH prompts.
2. Using wiTECH confirm that the contactors are open and waiting five minutes. If the contactors do not
open turn the ignition on then off. Once successful a note will appear on the wiTECH screen indicating
the contactors are open.
3. 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.
4. 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.

-3-

18-013-23 REV. B

5. Verify the HCP, AHCP and TCM are also programmed with the latest available software. Refer to all
applicable published service bulletins for detailed repair procedures and labor times regarding updating
the HCP, AHCP and TCM software.
6. Enable HV battery contactors with wiTECH - Go to the Misc Functions tab --> Select Enable HV Battery
Contactors For Service--> then follow the wiTECH prompts.
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.