2023 Jeep Compass / Renegade P0C74 MIL TSB

Jeep has released Technical Service Bulletin (TSB) 08-165-24 REV. A, dated July 30, 2024, to address a specific issue affecting certain 2023 Jeep Compass and 2023 Jeep Renegade vehicles. This bulletin supersedes a previous version, TSB 08-165-24 from July 18, 2024, and is also issued as Rapid Service Update (RSU) 24-105.

The TSB focuses on resolving instances where owners experience a "Malfunction Indicator Lamp (MIL) illumination" accompanied by the diagnostic trouble code (DTC) P0C74 - Motor Electronics Coolant Pump "B" Control Performance. The root cause is identified as a software update requirement for the Hybrid Control Processor (HCP) and Auxiliary Hybrid Control Processor (AHCP), also known as the Power Inverter Module (PIM).

Symptoms

Owners of affected vehicles will notice a "Malfunction Indicator Lamp (MIL) illumination" on their dashboard. This warning light indicates a detected issue within the vehicle's systems.

Fault Codes / DTCs

The primary diagnostic trouble code associated with this issue is:

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

This code specifically points to a performance problem with the motor electronics coolant pump, which is crucial for the hybrid system's thermal management.

Diagnosis / Trigger Conditions

For this TSB to apply, customers must experience the "Malfunction Indicator Lamp (MIL) illumination" and the vehicle must have set the DTC P0C74 - Motor Electronics Coolant Pump "B" Control Performance. Technicians will use a Scan Tool (wiTECH) to confirm the presence of the DTC and verify related systems are functioning correctly.

Important Warnings for Owners

It is crucial for owners to understand that this Rapid Service Update (RSU) 24-105 only applies to vehicles on the RSU VIN list. If your vehicle exhibits the symptom but is not on the RSU VIN list, a dealer can still perform the repair under the TSB provisions.

Safety Precautions for Technicians:

• The vehicle must not be connected to a high voltage charger during software updates.
• Before performing the software reprogramming, it is necessary to make the vehicle safe.
• Repairs involving high voltage components require the power supply of the high-voltage system to be disconnected.
• Only specifically trained technicians are authorized to work on high voltage systems.
• Always read and comply with general instructions for working safely on hybrid/electric vehicles and use appropriate Personal Protective Equipment (PPE).
• The order of reflashing modules is critical. The AHCP module must be flashed prior to all other modules to prevent compromising the modules.

Repair Procedure Summary

The repair 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 process requires specific steps to ensure a successful flash:

1. Open the vehicle's hood.
2. Install a battery charger to maintain a voltage of 13.0 to 13.5 volts throughout the process, ensuring it does not time out.
3. Connect a wiTECH micro pod II to the vehicle's data link connector.
4. Place the ignition in the “RUN” position.
5. Access the wiTECH 2.0 website and log in.
6. Select the vehicle to be updated.
7. Navigate to the “Action Items” screen, then the “Topology” tab.
8. Select the “AHCP” module icon from the “Topology” tab.
9. Compare the “AHCP Part Number” with the “New AHCP Part Number” listed in the “Flash” tab.
10. Select the AHCP flash part number, read special instructions, and confirm.
11. Agree to the terms on the flash AHCP agreement page.
12. Initiate the “Flash AHCP” and follow the on-screen instructions.
13. Perform the “HCP” software update following a similar procedure as steps 9-14.
14. Clear all diagnostic trouble codes (DTCs).
15. Cycle the ignition to “OFF” for at least five seconds, then back to “RUN”, and finally to “OFF” before removing the wiTECH device and battery charger.
16. Close the vehicle hood.

Required Tools or Parts

To perform this software update, technicians will need a wiTECH or equivalent diagnostic tool.

Owner Action

If your 2023 Jeep Compass or 2023 Jeep Renegade is experiencing a "Malfunction Indicator Lamp (MIL) illumination" and you suspect the P0C74 - Motor Electronics Coolant Pump "B" Control Performance issue, you should schedule an appointment with an authorized Jeep dealer. 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.

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Source: NHTSA ID: 11005682