# Service bulletin S2508000029 REV.A

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11036180
- Published by NHTSA: 2026\-08\-13
- Manufacturer's number: S2508000029 REV.A
- Manufacturer's date: 2026\-08\-04
- NHTSA component: BACK OVER PREVENTION: WARNINGS

## NHTSA's summary

Instrument Panel Cluster \(IPC\) Message “Park Assist System Unavailable” or “Service Park Assist System”, “Rear Braking Assist Unavailable” or “Service Rear Braking Assist System" with Performance Diagnostic Trouble Codes \(DTCs\)

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036180-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11036180-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Driver assistance, Backup camera

## Vehicles listed

- 2023 to 2027 JEEP GRAND CHEROKEE
- 2023 to 2026 JEEP GRAND CHEROKEE 4XE
- 2023 to 2027 JEEP GRAND CHEROKEE L
- 2023 to 2027 JEEP GRAND WAGONEER
- 2023 to 2025 JEEP WAGONEER

## Recalls for the same vehicles and component

- [26V531000](/recalls/nhtsa/26V531000.md), 2026-08-13: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
- [26V326000](/recalls/nhtsa/26V326000.md), 2026-05-21: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
- [24V944000](/recalls/nhtsa/24V944000.md), 2024-12-19: BACK OVER PREVENTION:SOFTWARE
- [24V436000](/recalls/nhtsa/24V436000.md), 2024-06-13: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
- [24V291000](/recalls/nhtsa/24V291000.md), 2024-04-25: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
- [24V289000](/recalls/nhtsa/24V289000.md), 2024-04-25: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
- [23V577000](/recalls/nhtsa/23V577000.md), 2023-08-14: BACK OVER PREVENTION:DISPLAY FUNCTION

## Other bulletins for the same vehicles and component

- [114282](/bulletins/11036779.md), 2026-09-03, Warranty extension: BACK OVER PREVENTION: WARNINGS. \*\*\*Recall Completion Prior to Sale of Vehicle\*\*\*
- [114283](/bulletins/11036778.md), 2026-09-03, Warranty extension: BACK OVER PREVENTION: WARNINGS. \*\*\*Recall Completion Prior to Sale of Vehicle\*\*\*
- [S2508000029 REV.B](/bulletins/11036279.md), 2026-08-19, Service bulletin: BACK OVER PREVENTION: WARNINGS. Instrument Panel Cluster \(IPC\) Message “Park Assist System Unavailable” or “Service Park Assist System”, “Rear Braking Assist Unavailable” or “Service Rear Braking Assist System" with Performance Diagnostic Trouble Codes \(DTCs\)
- [08\-135\-26](/bulletins/11030415.md), 2026-04-01, Service bulletin: BACK OVER PREVENTION: WARNINGS. PROXI Alignment and Drive Calibration: Park Assist Module \(PAM\) The vehicle must exhibit/set the following Diagnostic Trouble Code \(DTC\): SYMPTOM: ● B2286\-00 \- Calibration Not Learned\-Lost Calibration. NOTE: There is no Malfunction Indicator Lamp \(MIL\) illumination displaying in the Instrument Panel Cluster \(IPC\) for this condition. Customers may comment on the following: ● In the top down 360° camera view, the items on the ground \(i.e. parking lines\) appear curved instead of straight. During normal operation, items on the ground \(i.e. parking lines\) will appear straight. This bulletin involves performing the PAM Drive Calibration and PROXI alignment routine for the PAM.
- [S2508000029](/bulletins/11017123.md), 2025-04-22, Service bulletin: BACK OVER PREVENTION: WARNINGS; SERVICE BRAKES. Instrument Panel Cluster \(IPC\) Message “Park Assist System Unavailable” or “Service Park Assist System”, “Rear Braking Assist Unavailable” or “Service Rear Braking Assist System" with Performance Diagnostic Trouble Codes \(DTCs\)
- [0800824A](/bulletins/10251861.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM; BACK OVER PREVENTION. Radio Over The Air Update to U29.42 Software Version Customers may experience one or more of the following: ? Blank phone widget displayed. ? Radio freeze after reverse event \(Rearview Camera \(RVC\) Functions Normally\). ? Screen Off at start up \(RVC Functions Normally\). ? Radio restart before sleep after switching between different USBs. ? Pop up error "setting not saved" occurring when attempting to enable Geolocation \(Privacy Mode Off\). ? Amplifier module sets Diagnostic Trouble Code \(DTC\) U0485 Implausible Data Received From Radio. ? During FOTA Scheduling, if OK is not pressed to confirm time selected, vehicle will sleep. ? Apps downloaded for one connected profile are being shared with other local profiles. ? Switching profiles with slow response. ? Slow response switching between camera views. ? Black radio screen \(RVC functions normally\). ? Rear seat reminder alert unavailable. ? Wi\-Fi software update pop\-up is being triggered in non\-connected vehicles. ? Switching to Android menu, display screen blinks on green color. ? Microphone inoperative during SOS call from the vehicle. This bulletin provides information regarding the latest Firmware Over The Air \(FOTA\) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated from T27.39 or U29.28 to U29.42. NOTE: The national launch for the FOTA is expected to begin \*\*February 16, 2024.\*\*
- [0800124A](/bulletins/10251858.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM; BACK OVER PREVENTION. Flash: Drivetrain Control Module \(DTCM\) Updates A moaning, grinding, or groaning type noise while driving between 80 \- 112 kph \(50 \- 70 mph\). Noise is not heard when the front axle disconnect is disengaged. NOTE: This noise happens more as the ambient temperatures become less than 5 ? \(41 ?\). This bulletin involves reprogramming the DTCM with the latest available software.
- [1800424](/bulletins/10251853.md), 2024-03-18, Service bulletin: BACK OVER PREVENTION; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE; SERVICE BRAKES; EXTERIOR LIGHTING. Flash: Powertrain Control Module \(PCM\) Updates 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 \(DTCs\) have been set: ? \*\*P00C6\-00 \- Fuel Rail Pressure Too Low \- Engine Cranking. ? P06DD\-00 \- Engine Oil Pressure Control Circuit Performance/Stuck Off. ? P0461\-00 \- Fuel Level Sensor "A" Circuit Range/Performance. ? P051B\-00 \- Crankcase Pressure Sensor Circuit Range/Performance. ? P2F64\-00 \- Ion Sense Feedback Circuit A. ? P0331\-00 \- Knock Sensor 2 Circuit Range/Performance. ? P0300\-00 \- Multiple Cylinder Misfire.\*\* ? P2C90\-00 \- Crankcase Ventilation System \- Hose "A" Disconnected. ? P0011\-00 \- Bank 1 Camshaft 1 Position Timing Over Advanced Or System Performance. ? P0604\-00 \- Internal Control Module Random Access Memory Ram Error. ? P060C\-00 \- Internal Control Module Main Processor Performance. This bulletin involves reprogramming the PCM with the latest available software.
- [0300124](/bulletins/10251830.md), 2024-03-18, Service bulletin: BACK OVER PREVENTION; POWER TRAIN. Rattle Noise While Driving Customers may comment on the following: ? A rattling noise when driving. NOTE: This could be due to the rear driveshaft center support bearing not properly secured to the body. This bulletin involves inspecting and possibly tightening or replacing, the rear driveshaft center support bearing fasteners.
- [0800824](/bulletins/10251827.md), 2024-03-18, Service bulletin: ELECTRICAL SYSTEM; BACK OVER PREVENTION. Radio Over The Air Update to U29.42 Software Version Customers may also experience one or more of the following: ? Blank phone widget displayed. ? Radio freeze after reverse event \(Rearview Camera \(RVC\) Functions Normally\). ? Screen Off at start up \(RVC Functions Normally\). ? Radio restart before sleep after switching between different USBs. ? Pop up error "setting not saved" occurring when attempting to enable Geolocation \(Privacy Mode Off\). ? Amplifier module sets Diagnostic Trouble Code \(DTC\) U0485 Implausible Data Received From Radio. ? During FOTA Scheduling, if OK is not pressed to confirm time selected, vehicle will sleep. ? Apps downloaded for one connected profile are being shared with other local profiles. ? Switching profiles with slow response. ? Slow response switching between camera views. ? Black radio screen \(RVC functions normally\). ? Rear seat reminder alert unavailable. ? Wi\-Fi software update pop\-up is being triggered in non\-connected vehicles. ? Switching to Android menu, display screen blinks on green color. ? Microphone inoperative during SOS call from the vehicle. This bulletin provides information regarding the latest Firmware Over The Air \(FOTA\) update and provides the service technician an overview of the steps a customer will need to take to complete the update. The radio software will be updated from T27.39 or U29.28 to U29.42. NOTE: The national launch for the FOTA is expected to begin January 22, 2024

JSON: [/v1/bulletins/11036180](/v1/bulletins/11036180)

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