Malfunctions Of Various Control Units And/Or On-Board Power Supply Problems (LI83.00-P-045034)

Publication date: 2009-04-28
Reference number: LI83.00-P-045034
Supersedes refnos: 83.00/81, 83.00/81A, 83.00/81B, 83.00/81C

MALFUNCTIONS OF VARIOUS CONTROL UNITS AND/OR ON-BOARD POWER SUPPLY PROBLEMS

TECHNICAL SERVICE BULLETIN

Reference Number(s): LI83.00-P-045034 Version 2 (T-B-83.00/81C, March 24, 2009), Date of Issue: April 28, 2009

Mercedes-Benz:	Model 164.122/175/177/186/822/871; Model 251.122/165/175/177
Design Group:	83.00 General
Reason For Change:	Damage Code Revised

Superceded Bulletin(s): T-B-83.00/81B, Date of Issue: November 18, 2008

COMPLAINT

Malfunctions of Various Control Units and/or On-Board Power Supply Problems

CAUSE

Water entering the control unit tray under the driver/front passenger seat. The condensation water hoses from the AC housing can either be dislocated or pinched off resulting in water entering the interior. Affected control modules may include the Central Gateway (CGW), Front Signal Acquisition and Actuation Module (SAM front) and/or the Sound Amplifier and Adaptive Damping System (ADS). Problems with the on-board power supply voltage may also occur.

REMEDY

Dislocated Hose

If either of the right or left condensation water hoses is dislocated, re-install completely on the outlet fitting of the AC housing. Do not use any lubrication to install hose. Pull on the hose gently to check that it is secure. Wire tie fasteners can be used to hold hose in place. (Fig 1).
Repair any water damaged parts as necessary.

Pinched Hose

Set both sides of the climate control to maximum cooling.
From the bottom of the vehicle, check to see if water is flowing out of the condensation water drains.
If no water is flowing, inspect hoses for being pinched.
Correct pinching by repositioning the hose or replace the hose if it is damaged.
Repair any water damaged parts as necessary.

NOTE: The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on March 24, 2009. Please refer to Netstar -> Star TekInfo -> Star Time for the most current labor time allowance.

ATTACHMENTS

Fig 1: Condensation Water Hose Connections On Outlet Fittings Of AC Housing

SYMPTOMS

Body / Body/Cab / Body sealing / Water entry /

Battery/on-board electrical system display message / Battery/Alternator - Serviced Required / Overall vehicle / Power supply / Battery/On-board electrical system /

Battery/on-board electrical system display message / Low voltage Switch off consumers / Overall vehicle / Power supply / Battery/On-board electrical system /

Overall vehicle / Networking / CAN communication / Malfunction /

PARTS

Part number	Designation	Qty	Note	EPC	Non- EPC
A251 832 00 94	Hose	2			X
A004 997 98 90	Wire tie fastener	1-2			X

WORK UNITS

Op. no.	Operation text	Time	Damage code	Note
83-0000	AC WATER DRAIN HOSE DISCONNECTED OR PINCHED, CHECK/ REPAIR IF NEC.	0.5 hrs.*	83E01 04	Left hose Model Indicator (s): BA, BB, BC, BD, EA, EB, Z1, Z2, Z3, Z4 * Maximum time allowed with a separate time punch. Ensure that punches are labeled as NON time.
				OR
83-0000	AC WATER DRAIN HOSE DISCONNECTED OR PINCHED, CHECK/ REPAIR IF NEC.	0.5 hrs. *	83T01 04	right hose Model Indicator (s): BA, BB, BC, BD, EA, EB, Z1, Z2, Z3, Z4 * Maximum time allowed with a separate time punch. Ensure that punches are labeled as NON time.