2023 Jeep Compass Renegade DTC P0C74 MIL Flash Update

Jeep has issued Technical Service Bulletin (TSB) 08-165-24, also known as Rapid Service Update (RSU) 24-105, dated July 18, 2024, to address a specific issue affecting certain 2023 Jeep Compass and 2023 Jeep Renegade models. This bulletin provides a software update solution for vehicles experiencing a Malfunction Indicator Lamp (MIL) illumination alongside a particular diagnostic trouble code. This 2023 Jeep Compass manufacturer_communication is crucial for owners to understand the symptoms and the necessary repair.

Symptoms

Owners of affected vehicles may notice the Malfunction Indicator Lamp (MIL) illuminating on their dashboard. This warning light is typically accompanied by a specific Diagnostic Trouble Code (DTC) stored in the vehicle's computer system.

Fault Codes / DTCs

The primary Diagnostic Trouble Code associated with this issue is:

• P0C74 - "Motor Electronics Coolant Pump "B" Control Performance"

This DTC indicates a performance issue with the motor electronics coolant pump, which is vital for the proper operation of the hybrid system.

Diagnosis and Trigger Conditions

This TSB applies to 2023 Jeep Renegade (BV) and 2023 Jeep Compass (MV) vehicles built on or after September 01, 2022 (MDH 0901XX) and on or before March 31, 2024 (MDH 0331XX). Crucially, the vehicles must be equipped with the 1.3L I4 Turbo PHEV engine (Sales Code EYG). The issue is triggered when the vehicle's system detects the specific performance anomaly with the coolant pump, leading to the MIL illumination and the setting of DTC P0C74. For this 2023 Jeep Compass manufacturer_communication, technicians will verify the VIN against the RSU VIN list or confirm the presence of the specified symptoms.

Important Warnings for Owners and Technicians

Jeep has outlined several critical warnings and cautions related to this software update and any associated diagnostic or repair work:

• Do not connect the vehicle to a high voltage charger when performing software updates.
• Install a battery charger to ensure sufficient battery voltage is provided throughout the flash process. An interrupted or aborted flash process should be restarted.
• Before performing software reprogramming, the vehicle must be made safe.
• When working with high voltage components, technicians must ensure the power supply of the high-voltage system is disconnected.
• Only specifically trained technicians qualified to perform repairs on high voltage systems are authorized to work on the vehicle.
• Before any diagnostic repair, technicians must read and comply with general instructions for working safely on hybrid/electric vehicles and use appropriate Personal Protective Equipment (PPE).
• This Rapid Service Update (RSU) only applies to vehicles on the RSU VIN list. Owners should verify their VIN's applicability.

Repair Procedure Summary

The repair for DTC P0C74 involves updating the software for the Hybrid Control Processor (HCP) and the Auxiliary Hybrid Control Processor (AHCP), which is also known as the Power Inverter Module (PIM). The general steps are:

1. Reprogramming: The HCP and AHCP modules are reprogrammed with the latest available software using the wiTECH Diagnostic Application. If issues arise during flashing, a ticket should be submitted to the Helpdesk.
2. PROXI Alignment: After reprogramming, a "PROXI Alignment Procedure" must be performed using wiTECH. This routine is found under the 'Vehicle Preparations' tab.
3. Clear DTCs: Any Diagnostic Trouble Codes that may have been set in other modules due to the reprogramming process must be cleared. The wiTECH application will automatically present these DTCs for clearing after the flash.

This process ensures the proper functioning of the hybrid system's cooling components and resolves the underlying cause of the "Motor Electronics Coolant Pump "B" Control Performance" fault.

Required Tools or Parts

To perform this software update, technicians will require:

• wiTECH or Equivalent diagnostic tool.

Owner Action

If you own a 2023 Jeep Compass or Renegade with the 1.3L I4 Turbo PHEV engine and are experiencing a Malfunction Indicator Lamp (MIL) illumination or suspect an issue related to DTC P0C74, you should contact your authorized Jeep dealership. The dealer can verify if your vehicle's VIN is included in the applicable RSU list or if it exhibits the symptoms described in this 2023 Jeep Compass manufacturer_communication. The repair, which involves a software update, is reimbursable within the provisions of your vehicle's warranty. The estimated labor time for this procedure is 0.7 hours.

Source: NHTSA ID 11005004