2022 Jeep Wrangler PIM Software Update for MIL and EV System Issues

Owners of 2022 Jeep Wrangler 4xe vehicles equipped with the 2.0L I4 DOHC DI Turbo PHEV Engine (Sales Code ECX) may experience a "Malfunction Indicator Lamp (MIL) illumination." This issue is often accompanied by specific Diagnostic Trouble Codes (DTCs) and can lead to significant operational problems.

This Technical Service Bulletin (TSB) 08-060-25, dated March 7, 2025, addresses these concerns by providing a software update for the Power Inverter Module (PIM), also known as the Auxiliary Hybrid Control Processor (AHCP). This Jeep Wrangler PIM software update aims to restore proper function to the vehicle's hybrid systems.

Symptoms

Customers may notice a few key symptoms indicating a problem with their hybrid system. The primary symptom is the "Malfunction Indicator Lamp (MIL) illumination" on the dashboard. Beyond the warning light, drivers might experience more critical operational issues.

These can include the "Electric Vehicle (EV) system shuts down while transferring over to Internal Combustion Engine (ICE) motive power." Additionally, the "Engine Stop Start (ESS) function will also not operate as a result of this condition," impacting fuel efficiency and convenience.

Fault Codes / DTCs

When the "Malfunction Indicator Lamp (MIL) illumination" occurs, technicians investigating the issue using a scan tool will likely find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the vehicle's system:

Code	Description
P0C19-00	Drive Motor A Torque Delivered Performance
P1B03-00	Resolver Signal / MCPA Rationality

Diagnosis and Trigger Conditions

Diagnosis for this issue involves using a scan tool, such as wiTECH, to verify system functionality and check for DTCs. Technicians should utilize the appropriate Diagnostic Procedures available in DealerCONNECT/Service Library. If the customer's reported symptoms match those described in this bulletin, and the listed DTCs are present, the Jeep Wrangler PIM software update procedure should be followed. Any other DTCs or symptom conditions should be recorded and repaired as necessary before proceeding with this specific bulletin's repair.

Required Tools

The primary tool required for this repair is a wiTECH diagnostic system or an equivalent scan tool. This tool is essential for disabling and enabling HV Battery Contactors, reprogramming the PIM, and clearing Diagnostic Trouble Codes.

Important Warnings and Safety Information

Before performing the software reprogramming, several critical safety precautions must be observed. These warnings are crucial for the safety of the technician and to prevent damage to the vehicle:

• Vehicle Safety: "Before performing the software reprogramming, it is necessary to make the vehicle safe."
• High Voltage System: "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."
• Qualified Technicians: "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."
• General Safety: "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)."
• Battery Charger: "Install a battery charger to ensure sufficient battery voltage is provided during the flash process."
• Interrupted Flash: "If this flash process is interrupted/aborted, the flash should be restarted."
• High Voltage Charger: "The vehicle must not be connected to a high voltage charger when performing software updates."

Repair Procedure Summary

The repair involves reprogramming the Auxiliary Hybrid Control Processor (AHCP), also known as the Power Inverter Module (PIM), with the latest available software using the wiTECH diagnostic system. The general steps are as follows:

1. Disable HV Battery Contactors: Using wiTECH, navigate to the Misc Functions tab and select "Disable HV Battery Contactors." Follow the on-screen prompts to ensure the high-voltage system is safely de-energized.
2. Reprogram PIM: Reprogram the PIM with the most current software available. If any issues arise during the flashing process using the wiTECH Diagnostic Application, technicians are instructed to submit a ticket to the Helpdesk, which can be found within the Help menu.
3. Enable HV Battery Contactors: After successful reprogramming, return to the wiTECH Misc Functions tab and select "Enable HV Battery Contactors For Service." Follow the prompts to re-energize the high-voltage system.
4. Clear DTCs: Clear any Diagnostic Trouble Codes that may have been set in any modules as a result of the reprogramming. The wiTECH application will automatically present all DTCs and allow them to be cleared.

Warranty Information

This repair, identified by TSB 08-060-25, is reimbursable within the provisions of the vehicle's warranty. Dealers should use the following claims data:

• Labor Operation No: 18-19-86-BD
• Labor Description: Processor, Hybrid Control (HCP/AHCP) - Reprogram, Includes Contactor Routine (0 - Introduction)
• Skill Category: 6 - Electrical and Body Systems
• Labor Time: 0.6 Hrs.
• Failure Code: CC (Customer Concern)

The failure code "CC" should be used if the customer's concern matches the symptoms identified in this Technical Service Bulletin. When using this failure code, the "3C's" (customer's concern, cause, and correction) must be provided for processing flash/reprogramming conditions.

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Source: NHTSA ID: 11015533, TSB 08-060-25