WenmarOpen by Wenmar Pro

Service bulletin 08-193-26

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11032318
Published by NHTSA2026-05-06
Manufacturer's number08-193-26
Manufacturer's date2026-04-30
NHTSA componentELECTRICAL SYSTEM

NHTSA's summary

Global Telematics Box Module (TBM) Firmware Over The Air (FOTA) Update From R5R1 To R5T Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● B1560-11 - Cellular Antenna 1-Circuit Short To Ground. ● B1560-13 - Cellular Antenna 1-Circuit Open. ● B1561-11 - Cellular Antenna 2 Short To Ground. ● B1561-13 - Cellular Antenna 2-Circuit Open. ● B1562-14 - GPS Antenna-Circuit Short To Ground Or Open. ● B22A9-96 - ECU Internal Performance - Component Internal Failure. Customers may also experience the following: ● "Uconnect Box Requires Service" Message on the display screen. 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 TBM software will be updated from R5R1 to R5T software level.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system

Trouble codes named

B1560, B1561, B1562, B22A9

Vehicles listed
JEEP CHEROKEE2026
JEEP WAGONEER S2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20260432026-02-02. Electrical
26V0590002026-02-02. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; EXTERIOR LIGHTING:TURN SIGNAL; EXTERIOR LIGHTING:BRAKE LIGHTS

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
S26080000372026-10-16. Service bulletin. Negative Response 0X33 - Security Access Denied When Flashing BPCM With WiTech
S26080000372026-10-16. Service bulletin. Negative Response 0X33 - Security Access Denied When Flashing BPCM With WiTech
S26230000562026-10-07. Service bulletin. The Door Latch Module Has Active Faults With No Warning Indicators In Cluster
08-332-26 REV. B2026-09-23. Service bulletin. Hybrid Cooling Pump Emergency Mode Condition Customers may comment on one or more of the following: SYMPTOM: ● 12V battery is draining. NOTE: The auxiliary heat and battery coolant pumps can enter emergency mode and drain the 12V battery. ● A pump running at full speed noise may be heard from the engine compartment after the vehicle is turned off. This bulletin involves replacing the Auxiliary Heat Pump (AHP).
OTHERDOC_1792026-09-17. Other. Radio Over The Air Update to U43.17 R1H Software Version (FOTA) Customers may experience one or more of the following:- Navigation Stability - Android Auto & Carplay stability & connectivity- Power management app- Distorted/glitchy display prior to start‑up animation- Text appearance display- Widget incorrect display- Turn signal blind spot response timing- Audio cut out - Drive Modes selection- Park assist Guidelines selctio
08-332-26 REV. A2026-09-17. Service bulletin. Hybrid Cooling Pump Emergency Mode Condition Customers may comment on one or more of the following: SYMPTOM: ● 12V battery is draining. NOTE: The auxiliary heat and battery coolant pumps can enter emergency mode and drain the 12V battery. ● A pump running at full speed noise may be heard from the engine compartment after the vehicle is turned off. This bulletin involves replacing the Auxiliary Heat Pump (AHP).
08-332-262026-09-17. Service bulletin. Hybrid Cooling Pump Emergency Mode Condition Customers may comment on one or more of the following: SYMPTOM: ● 12V battery is draining. NOTE: The auxiliary heat and battery coolant pumps can enter emergency mode and drain the 12V battery. ● A pump running at full speed noise may be heard from the engine compartment after the vehicle is turned off. This bulletin involves replacing the Auxiliary Heat Pump (AHP).
08-178-26 REV. A2026-09-17. Service bulletin. Flash: Power Liftgate Module (PLGM) Update Customers may comment on one or more of the following: ● The power liftgate chime remains active continuously and does not stop after the liftgate is closed or after an ignition cycle. ● The vehicle will not start due to a discharged battery. NOTE: Battery discharge caused by a continuously active liftgate chime or liftgate remaining open for an extended period. The following PLGM software enhancements are available with this software release: ● New Diagnostic Trouble Codes (DTCs) have been added to the PLGM to report out-of-range ambient temperature and the PLGM being left in plant mode. This bulletin involves reprogramming the PLGM with the latest software.
S2623000052 REV. A2026-09-10. Service bulletin. Airbag Warning Light On or Intermittent. The Occupant Restraint Controller (ORC) May Have The Following DTCs (Active/Stored)
08-326-26 REV. A2026-09-03. Service bulletin. Malfunction Indicator Illuminated (MIL) - P04DF-00 Has Set Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set the following Diagnostic Trouble Code (DTC): ● P04DF-00 - Evap System Purge Control Valve 1 Performance/Stuck Open.