Transcription
Fault Code ManualforMercedes-BenzAnalog Systems1988-1997Digital Systems1993-2000 Baum Tools Unlimited Inc. February 1, 2001
Table of ContentsThe Diagnostic ProcessInformation Gathering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4Diagnostic Codes & AdaptationDiagnostic Code Readout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .About Stored, Registered and Current Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Fault Code Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Check Engine Light (MIL) Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mixture Adaptation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Resetting and Reactivating BOSCH Engine Control Module Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Using the Data Stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6677899Equipment ConnectionsConnection Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Connector Layout of Vehicle Diagnostic Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-pole Diagnostic Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-pole Diagnostic Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38-pin Diagnostic Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-pole Diagnostic Connector (1980-94) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Mercedes Model Identifier.101111111213100Fault CodesEngine ControlElectronic Diesel Idle Speed Control (ELR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic Diesel System (EDS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Continuous Fuel Injection System (CFI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Continuous Fuel Injection System (MAS Controller) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LH Sequential Multiport Fuel Injection System - Analog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .LH Sequential Multiport Fuel Injection System - Digital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HFM Sequential Multiport Fuel Injection System - Analog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HFM Sequential Multiport Fuel Injection System - Digital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PMS (PEC) Fuel Injection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ME Sequential Multiport Fuel Injection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Module (DM) - Analog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Module (DM) - Digital LH (104, 119, 120) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Diagnostic Module (DM) - Digital HFM (104, 111) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Base Module (BM) - LH-SFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Distributor Ignition (DI) - LH-SFI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cruise Control/idle Speed Control (CC/ISC) w/o ASR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic Accelerator / Cruise Control / Idle Speed Control (EA/CC/ISC) w/ASR . . . . . . . . . . . . . . . . . . . . . . .1414151617182022252641434547484950Chassis ControlElectronic Automatic Transmission Control (ETC) CFI (722.5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic Automatic Transmission Control (ETC) 1990-95 (722.5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Automatic-engaged Four-wheel Drive (4MATIC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic Automatic Transmission Control (ETC) 1996-2000 (722.6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Adaptive Damping System (ADS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Automatic Locking Differential (ASD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Anti-lock Brake System (ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Anti-lock Brake system (ABS w/ASR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Electronic Traction Systems (ASR, ETS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Speed Sensitive Power Steering (SPS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251515253545555565758
Electronic Traction Systems (ABS, ASR, ETS, SPS) Digital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Body ControlCabriolet Soft Top (CST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Roll Bar (RB) for CST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Roadster Soft Top (RST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62, 63Roll Bar (RB) for RST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63Infrared Remote Control For Central Locking (IRCL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64, 65Pneumatic Systems Equipment (PSE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Anti-theft Alarm System( ATA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Cellular Telephone (CT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Convenience Features (CF) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67Supplemental Restraint System (SRS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Supplemental Restraint System (SRS) BAE, ZAE System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68Supplemental Restraint System (SRS) with Side Airbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69Body Control Systems (SRS, IRCL, PSE, ATA. RST, MSC, CF) Digital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70Climate ControlTempmatic A/C . . . . . . . . . . . . . . . .Automatic A/C . . . . . . . . . . . . . . . . .A/C SELF DIAGNOSTIC SYSTEMSTAU 2.1 . . . . . . . . . . . . . . . . . .129 Chassis 1990-95 . . . . . . . .129 Chassis 1996-99 . . . . . . . .140 Chassis 1992-95 . . . . . . . .140 Chassis 1996-99 . . . . . . . .202 Chassis 1995 . . . . . . . . . .202 Chassis 1996-99 . . . . . . . .210 Chassis 1996-99 . . . . . . . .Mercedes Technical AcronymsMercedes Model Identifier.7374.7577798186899394. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97.Mercedes Diagnostic Manuals.Technical Support Contact Information100106. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107DISCLAIMER: All information contained in this document is correct to the best of our knowledge. Errors may occurtherefore Baum Tools Unlimited Inc. makes no warrantee, guarantee or assurance that damage may not occur from theuse of this information. The user takes all responsibility for its use.Mercedes Benz is a registered trademark of Daimler Chrysler AG.Copyright 1998-2001 BAUM TOOLS UNLIM ITED INC.All rights reserved. Any reproduction in w hole or in part w ithout perm ission is strictly prohibited.3
This book is designed to help you in the basic diagnostic procedures for Mercedes Benz.It is intended to be a starting point in the diagnostic process and is not intended to be a completeresource.THE DIAGNOSTIC PROCESSThe diagnostic process divides itself into several levels; Information Gathering, Analysis of Codes, Testing and thenRepair. W e will cover Information Gathering and Analysis of codes in this book.For those experienced in diagnostics jump to pageINFORMATION GATHERINGThe information gathering stage always starts with the Customer.Step 1The Customer InterviewThis is truly an art.It consists of getting the Customer to tell you what the complaint is and under what conditions it occurs.The customer of course is, as always, the “MOST HELPFUL” source of information. Their concise insight into theproblem is a valuable step in getting the problem solved and the car back on the road. Also it’s the most fun part ofthe diagnostic process. W atching the customer use body gestures, make funny faces and funny sounds in an attemptto imitate vehicle noises can really brighten your day.Actually the process of getting the information out of the customer can be relatively painless if you ask the correctquestions.Here are1)2)3)4)5)6)7)some suggestions:W hat is the problem/symptom(s)?W hen did it start?Under what conditions did the problem/symptom occur (if intermittent)? W et, dry, hot, cold or changing weather,rough road,.etc.Has there been any work done on the car recently? New radio, shocks, tires.etc?Any jump starts or hard starts with long crank times.Did you run out of gas recently?Are you sure this hasn’t happened before, even for a short time?Next the exact nature of the complaint must be addressed.Step 2The Test DriveGo on a test drive with the Customer so you can/cannot experience the problem/symptom. This ensures that themalfunction you try to diagnose and fix is the one with that the customer is concerned about and that it is a realmalfunction and not just a lack of understanding of normal vehicle operation.Few things are more frustrating for you and the customer than repairing a suspension noise in the front of the car(even if it did need new shocks, thrust bushings, brakes and a set of tires) when it was an engine noise that thecustomer wanted fixed.It is also a good idea to let the customer drive on the outbound leg so you can watch the customers driving technique.The customer is more likely to be able to make the car “do it” then you will.Sometimes a customer can mistake normal vehicle operation for a problem. An example of this is a customer whosevehicle has an Anti-Lock Brake System (ABS), and is concerned because of a pulsating brake pedal when brakinghard. Since many people are unaware of this characteristic of normal ABS operation, they mistake this for amalfunction.Also if you start diagnosing a vehicle for a problem when the vehicle is operating normally, you can be in for a longfrustrating day.4
Step 3Visually Inspect the VehicleDon’t leave out this step. You can save lots of time with this.Engine - Look under the hood. Check for missing covers, oil and water splash, burn marks, nestingmaterials, mis-routed wiring and anything else that looks out of place.ABS/ASC/DSC/ASR - Lift hood and inspect the fluid level. Raise the car and inspect the brakes/wheels forexcess dust and corrosion. Check that all static charge grounding straps are in place.Transmission - Look for beverage spillage on the center console area. Look for problems in the operation ofthe instrument cluster and
The stored diagnostic trouble codes (DTCs) can be read at the 16 (124 E-class) or 38 pin data link connector (X11/4) with the ignition switched "ON" or with the "engine running". Diagnosis via an on-off
