2021 Jeep Compass ABS Software Update TSB 08-083-24

Owners of the 2021 Jeep Compass may encounter specific issues related to the Anti-Lock Brake System (ABS) software. Technical Service Bulletin (TSB) 08-083-24 REV. A, issued on June 4, 2024, describes these concerns and provides a solution. This bulletin supersedes a previous version, TSB 08-083-24, dated March 19, 2024.

This TSB applies to 2021 Jeep Compass vehicles equipped with various engine and transmission combinations, including 1.4L I4 Multiair Turbo Engine w/ESS (Sales Code EAQ), 2.0L I4 Turbo Diesel Engine W/ESS (Sales Code EBS), 2.4L I4 Multiair Engine (Sales Code ED6), and 2.4L I4 Multiair Engine w/ESS (Sales Code EDD). It also covers vehicles with 6-Spd Aisin F21-250 Gen 3 Auto Trans (Sales Code DF7), 7-Spd C725 DDCT Auto Trans (Sales Code DA2), or 9-Spd 948TE FWD/AWD Auto Trans (Sales Code DFH).

Symptoms

If you own a 2021 Jeep Compass, you might experience one or more of the following indicators:

• A warning message displayed on the Instrument Panel Cluster (IPC) stating: "Auto Hold Unavailable Service Required."
• The IPC "Hold" indicator illuminating intermittently.
• The Engine Stop/Start (ESS) system becoming inoperative.

It is important to note that, according to the TSB, these symptoms typically occur without any Diagnostic Trouble Codes (DTCs) being present during vehicle scans.

Cause

The root cause of these issues in the 2021 Jeep Compass is identified as the ABS software. An outdated or faulty software version within the ABS module can lead to the observed symptoms.

Important Warnings for the Repair Process

When performing the software update, technicians must adhere to specific guidelines to ensure a successful flash and prevent module damage:

• Battery Voltage: Install a battery charger to maintain battery voltage between 13.2 and 13.5 volts. Do not allow the charging voltage to exceed 13.5 volts during the flash process.
• Interruption: If the flash process is interrupted or aborted for any reason, it must be restarted from the beginning.

Diagnosis

For diagnosis, a technician will use a wiTECH scan tool to verify that all related systems are functioning correctly. If a customer describes the symptoms listed in TSB 08-083-24 REV. A, the repair procedure outlined in the bulletin should be followed. Any other DTCs or symptoms should be addressed separately before proceeding with the ABS software update.

Repair Procedure Summary

The repair for the 2021 Jeep Compass ABS software issue involves updating the ABS module with the latest available software. The process is as follows:

1. Prepare the Vehicle: Connect a battery charger to the vehicle to ensure stable voltage throughout the programming process, maintaining it between 13.2 and 13.5 volts.
2. Reprogram ABS Module: Using the wiTECH Diagnostic Application, the technician will reprogram the Anti-Lock Brake System (ABS) module with the most current software. If any issues arise during this flashing process, a ticket should be submitted to the Helpdesk.
3. Clear DTCs: After the software flash is complete, the wiTECH application will automatically present any DTCs that may have been set in other modules due to the reprogramming. These DTCs must be cleared.
4. Post-Flash Routine: Perform the ECU Replace/Post Flash Procedure routine found under the "Misc Functions" menu in the wiTECH application.

This repair is reimbursable under the provisions of the vehicle's warranty.

Required Tools or Parts

The primary tool required for this service is the wiTECH diagnostic system or an equivalent tool capable of performing module reprogramming.

Owner Action

If your 2021 Jeep Compass is exhibiting the warning message "Auto Hold Unavailable Service Required.", the IPC "Hold" indicator illuminating occasionally, or an inoperative Engine Stop/Start system, you should schedule an appointment with your authorized Jeep dealership. The dealer will perform the necessary ABS software update as outlined in TSB 08-083-24 REV. A. The labor time for this procedure is estimated at 0.3 hours.

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Source: NHTSA ID: 11001562