L405 Deployable Side Steps - Not Working In Automatic Program's (SSM66257)

L405 DEPLOYABLE SIDE STEPS - NOT WORKING IN AUTOMATIC PROGRAM'S

TECHNICAL SERVICE BULLETIN

SERVICE INFORMATION

(Symptom Electrical Accessories)

ISSUE

Customers reporting that the Deployable Side Steps are failing to deploy.

CAUSE

Content:

If a customer is driving in Automatic Terrain Response Program's then under certain road conditions the vehicle will seamlessly switch between any of the 5 operational modes without notifying the customer. This feature is to give the customer the most enhanced driving experience possible.

The Deployable Side Step system is designed to not function in the following 3 Terrain Programs.

• MUD - RUTS
• SAND
• ROCK CRAWL

As a consquence if the vehicle automatically enters into one of these 3 modes then the Deployable Side Step System will not deploy by design.

ACTION

If a customer reports that their Side Steps are failing to deploy with the vehicle in Automatic Terrain Response Program's then the attached documentation can be given. This details the interaction of the Automatic Terrain Response Program and the Deployable Side Step system and highlights the reason for non-deployment.

It also details a method of deactivating the Automatic Terrain Response Program feature which will allow the General Program (Special Program's Off) or GRASS/GRAVEL/SNOW Program to be selected. This will then allow the Deployable Side Steps to deploy as intended.

When operating the vehicle In Automatic ("AUTO") program, the vehicle will determine and apply the approriate program for driving style and surfaces.

This optimised selection will be made without the specific program information displayed to the driver.

Should the vehicle Terrain program automatically change to any of the following; 

• MUD-RUTS 
• SAND 
• ROCK CRAWL 

The steps will not deploy regardless of door state, this is designed to protect the DSS system from damage. 

In AUTO TR program, the DSS system will remain inoperative until either

• AUTO program is deactivate and GENERAL PROGRAM (SPECIAL PROGRAMS OFF) or GRASS/GRAVEL/SNOW program is selected, or
• The vehicle determines that GENERAL PROGRAM (SPECIAL PROGRAMS OFF) or GRASS/GRAVEL/SNOW program is suitable for the current driving style and conditions.

To disengage Automatic ("AUTO") programs, the rotary selector needs to be raised to the elevated position.

If the selector is in Automatic programs, press the selector to engage manual modes. The rotary dial will rise allowing the selection of 5 Terrain Response programs 

Selection of the following programs will allow the steps to function: 

GENERAL PROGRAM 

or 

GRASS/GRAVEL/SNOW