NHTSA ID Number: 10144523
Manufacturer Communication Number: SSM73944
TSB/Document Date: 2018-09-17
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.
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TSB/Document ID: SSM73944
Replacement Service Bulletin Number:
MFR Communication Date: 2018-07-02
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: EQUIPMENT:ELECTRICAL
MFR Component System:
MFR Component Subsystem:
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7/2/2018
SSM73944 - Audible sound emitted from under bonnet when vehicle is unlocked | TOPIx
Reference
SSM73944
Models
Range Rover / L405
Title
Audible sound emitted from under bonnet when vehicle is unlocked
Category
Electrical
Last modified
02-Jul-2018 00:00:00
Symptom
206000 Warning Indicators
Content
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.
Action: If a customer reports the concern please re-configure the
existing AAM using Pathfinder P170.
Note: Affected VIN range LG343640 – 513473.
Note: The concern does not affect Range Rover Sport PHEV.
Technicians - Please rate this SSM and provide comments so that future
communications can be improved.
1 = Poor – Basic information provided – The SSM does not help me
resolve the customer concern.
3 = Average – Adequate information provided – The SSM partially helps
me resolve the customer concern.
5 = Excellent – All required information provided to resolve the customer
concern.
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