# Service bulletin S2108000012RevB 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: 10220878 - Published by NHTSA: 2022\-09\-26 - Manufacturer's number: S2108000012RevB - Manufacturer's date: 2021\-03\-11 - NHTSA component: EXTERIOR LIGHTING ## NHTSA's summary Auto High Beams Do Not Operate ## The document - [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10220878-0001.pdf) - [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10220878-9999.pdf) The document is the manufacturer's. This site does not hold it. ## Components Lighting ## Vehicles listed - 2021 JEEP GRAND CHEROKEE ## Recalls for the same vehicles and component - [2022408](/recalls/tc/2022408.md), 2022-07-28: Lights And Instruments - [22V544000](/recalls/nhtsa/22V544000.md), 2022-07-28: EXTERIOR LIGHTING:TAIL LIGHTS - [2021747](/recalls/tc/2021747.md), 2021-12-10: Lights And Instruments - [21V950000](/recalls/nhtsa/21V950000.md), 2021-12-09: EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE; EXTERIOR LIGHTING:HEADLIGHTS - [2021630](/recalls/tc/2021630.md), 2021-10-14: Lights And Instruments - [21V797000](/recalls/nhtsa/21V797000.md), 2021-10-14: EXTERIOR LIGHTING:HEADLIGHTS - [2021372](/recalls/tc/2021372.md), 2021-06-11: Lights And Instruments ## Other bulletins for the same vehicles and component - [2300424](/bulletins/10251854.md), 2024-03-18, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. Headlamp Condensation Clearing Procedure Some customers may report that on occasion, vehicle exterior head lamp assemblies are fogged with a light layer of condensation on the inside of the lenses. - [2302923](/bulletins/10248045.md), 2024-01-02, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. Headlamp Condensation Clearing Procedure Some customers may report that on occasion, vehicle exterior head lamp assemblies are fogged with a light layer of condensation on the inside of the lenses \(Fig. 1\) . This bulletin is to communicate the procedure for head lamp condensation clearing. - [S2223000075](/bulletins/10243190.md), 2023-10-02, Service bulletin: STRUCTURE; EXTERIOR LIGHTING:HEADLIGHTS. Front Fascia Cover Gaps And Or Poor Fitment Near Headlight. - [S2323000063](/bulletins/10243144.md), 2023-10-02, Service bulletin: UNKNOWN OR OTHER; EXTERIOR LIGHTING:TAIL LIGHTS. Outer Tail Lamp Front Edge Has A Gap To The Quarter Panel Or Tail Lamp Appears Loose. - [S2108000194](/bulletins/10242759.md), 2023-09-25, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. High Beam Headlamps Cannot be Turned on with the Headlamp Switch Set to ?AUTO? - [0811223](/bulletins/10236957.md), 2023-05-30, Service bulletin: EXTERIOR LIGHTING; EXTERIOR LIGHTING:TAIL LIGHTS. Rear Tail Lamp Condensation Clearing Procedure Some customers may report that on occasion, vehicle exterior tail lamp assemblies are fogged with a light layer of condensation on the inside of the lenses. This may be reported after the lamps have been turned on and brought up to operating temperature, turned off, and then rapidly cooled by cold water \(such as rain, or the water from a vehicle wash\). This bulletin is to communicate the procedure for rear tail lamp condensation clearing. - [2302923](/bulletins/10234518.md), 2023-04-17, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS. Headlamp Condensation Clearing Procedure Some customers may report that on occasion, vehicle exterior head lamp assemblies are fogged with a light layer of condensation on the inside of the lenses \(Fig. 1\) . This bulletin is to communicate the procedure for head lamp condensation clearing. - [08\-020\-23](/bulletins/10231797.md), 2023-02-13, Service bulletin: ELECTRICAL SYSTEM; EXTERIOR LIGHTING; STRUCTURE; SERVICE BRAKES; BACK OVER PREVENTION. Flash: Radio Frequency Hub Module \(RFHM\) 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 Code \(DTCs\) have been set: B21DD\-84 \- System Voltage\-Signal Below Allowable Range. B21DD\-85 \- System Voltage\-Signal Above Allowable Range. C151D\-00 \- Tire Pressure Sensor Location Undetermined. U1517\-87 \- Body Controller Secret Code\-Missing Message. B1A71\-01 \- Passive Entry Antenna 1\-General Electrical Failure. B1A72\-01 \- Passive Entry Antenna 2\-General Electrical Failure. B1A73\-01 \- Passive Entry Antenna 3\-General Electrical Failure. B1A74\-01 \- Passive Entry Antenna 4\-General Electrical Failure. B1A75\-01 \- Passive Entry Antenna 5\-General Electrical Failure. The customer may also experience one or more of the following: ?Fob Left Vehicle? message is displayed on Instrument Panel Cluster \(IPC\) after a remote start. Vehicle no\-starts. This bulletin involves updating the RFHM module with the latest available software - [9100096](/bulletins/10230407.md), 2023-01-17, Service bulletin: EXTERIOR LIGHTING:HEADLIGHTS; EXTERIOR LIGHTING. Base Headlamp Bright, Base Headlamp Black - [0816122](/bulletins/10229577.md), 2023-01-09, Service bulletin: ELECTRICAL SYSTEM; SEATS; VEHICLE SPEED CONTROL; EXTERIOR LIGHTING. Flash: Memory Seat Module \(MSM\) Updates This bulletin involves reprogramming the MSM with the latest available software. Customers may experience a Malfunction Indicator Lamp \(MIL\) illumination. Upon further investigation the technician may find the following Diagnostic Trouble Code \(DTC\). B1D9B\-54 \- Seat Horizontal Front Stop Not Learned\-Missing Calibration. Customers may experience the following:Memory seat do not save on profiles 1 or 2. Easy entry/exit functionality is inoperative. Drivers massage seats do not recall lumbar and bolster position when profile selected on radio \(Recall from door switches and keyfob work as expected\). JSON: [/v1/bulletins/10220878](/v1/bulletins/10220878) [Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20S2108000012RevB&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10220878&vehicle=Service%20bulletin%20S2108000012RevB)