Flash: Powertrain Control Module (Pcm) Updates P0629, P0171, P0087 (18-080-24)

WARNING: This page is about the Grand Cherokee 4xe, which is a different variant/trim than selected.

Publication date: 2024-10-23
Reference number: 18-080-24

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES P0629, P0171, P0087

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-080-24, Date of Issue: October 23, 2024

CHRYSLER:	2022 (WL) Jeep Grand Cherokee/Grand Cherokee L
GROUP:	18 - Vehicle Performance

VEHICLES AFFECTED

2022 (WL) Jeep Grand Cherokee/Grand Cherokee L

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

CUSTOMER SYMPTOM

Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs) has been set:

P0629 - Fuel Pump Control Circuit High.
P0171 - Fuel system Lean.
P0087 - Fuel Rail Pressure Too Low - Bank 1.

Customers may experience one or more of the following:

Vehicle will not start.
The Instrument Cluster Panel (ICP) unable to calculate the instantaneous fuel economy under heavy acceleration.
The oxygen sensor can give incorrect values when entering EV mode. False fault detection (MIL on) is possible when this event occurs.
The rear half shafts are damaged due to accelerating in drive with the Electronic Parking Brake (EPB) applied.

CAUSE

Module software updates.

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-KV	Module, Powertrain Control (PCM) - Reprogram (0 - Introduction)	1 - Engine Repair And Performance	0.5 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 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

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).

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.

CAUTION: The vehicle must not be connected to a high voltage charger when performing software updates.

Is the Recall Campaign 04B open for this vehicle?
- YES>>> Perform the 04B Recall Campaign. Follow the 04B Recall instructions and utilize the LOPs contained within the Recall.
- NO>>> Proceed to Step 2.
Does the PCM have the latest software already installed?
- YES>>> This bulletin has been completed.
- NO>>> Proceed to Step 3.
Disable HV Battery Contactors using wiTECH - Go to the Misc Functions tab --> Select Disable HV Battery Contactors --> then follow the wiTECH prompts.
Use wiTECH to 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.
Reprogram the PCM with the latest software. If issues arise when flashing a module using the wiTECH Diagnostic Application, please submit a ticket to the Helpdesk. The helpdesk can be found within the Help menu.
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.
Enable HV Battery Contactors using 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.