# Service bulletin SSM73933

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: 10144538
- Published by NHTSA: 2018\-09\-17
- Manufacturer's number: SSM73933
- Manufacturer's date: 2018\-07\-12
- NHTSA component: EQUIPMENT; ELECTRICAL SYSTEM; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL

## NHTSA's summary

Issue: A customer may report an audible sound \(groan type noise\) from under bonnet immediately after the vehicle is unlocked and the vehicle stationary. The sound will extinguish after several seconds and is generated by the Acoustic Vehicle Alert System \(AVAS\) sounder fitted to Plug\-in Hybrid Electric Vehicles \(PHEV\). The AVAS is located behind the grille at the front of the vehicle. Cause: Software error in the Audio Amplifier Module \(AAM\) related to a communication timing error during wake up when vehicle is unlocked.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10144538-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10144538-0001.pdf)

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

## Components

Electrical system, Equipment and accessories, Software

## Vehicles listed

- 2018 LAND ROVER RANGE ROVER

## Other bulletins for the same vehicles and component

- [SSM71360](/bulletins/10206635.md), 2022-01-18, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Software Update.
- [SSM70258](/bulletins/10206633.md), 2022-01-18, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Software Update.
- [LTB00619NAS1](/bulletins/10204785.md), 2021-12-13, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. Technical Bulletin: Unable To Release Valet Mode Upon Correct PIN Entry onwards
- [SFCC\_NOV2021\_25](/bulletins/10204122.md), 2021-12-07, Service bulletin: EQUIPMENT:APPLIANCE:TV/RADIO/SPEAKERS; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT:ELECTRICAL:NAVIGATIONAL SYSTEM\(GLOBAL POSITIONING SYSTEM\). Post 21A Update Apple CarPlay® Navigation Voice Guidance Not Heard
- [JLRTB02056NAS1](/bulletins/10182150.md), 2020-11-06, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. The Malfunction Indicator Lamp \(MIL\) is illuminated on the Instrument Panel Cluster \(IPC\)with no other effects on vehicle operation.
- [SFCC Jul20\_26](/bulletins/10178159.md), 2020-08-07, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT. 20B Software Delay until July 15th Software was delayed to include software fix for L551 APIX cable issue Audio popping noise iOS13 Bluetooth improvements Additional improvements
- [JLRTB02017NAS2](/bulletins/10173505.md), 2020-04-07, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. The Interactive Control Display Module \(ICDM\) may not be operating as expected. A purple line can be seen flickering on the lower edge of the ICDM.
- [RCTR\_29JAN20\_23](/bulletins/10171150.md), 2020-02-07, Service bulletin: SUSPENSION; ELECTRICAL SYSTEM:SOFTWARE. Noise From Dynamic Suspension
- [Tech\_RS\_NOV19\_77](/bulletins/10168946.md), 2019-12-07, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Check Engine lamp illuminated with DTC P2002\-00 stored in the PCM which requires DPF replacement
- [SFCC\_NOV19\_40](/bulletins/10168935.md), 2019-12-07, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. Customer states the vehicle will not start.

JSON: [/v1/bulletins/10144538](/v1/bulletins/10144538)

[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%20SSM73933&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10144538&vehicle=Service%20bulletin%20SSM73933)