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Diagnostic Manual, Engines, Volume 3

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LOCATION:    8.6 Diagnostic Module (DM)   >   22 Electrical Test Program - Preparation for Test

Electrical Test Program - Preparation for Test

Preliminary work: Diagnosis - Diagnostic Trouble Code (DTC) Memory 11

1. Ignition: OFF
2. Remove diagnostic module (OBD II, N59/1). On Model 140 as of Model Year 1996 remove rear seat cushion and loosen bracket for diagnostic module.
3. Connect socket box with test cable according to connection diagram.

Electrical wiring diagrams :
Electrical Troubleshooting Manual, Model 129.
Electrical Troubleshooting Manual, Model 140.
Electrical Troubleshooting Manual, Model 210.

Conventional tools, test equipment

Description Brand, model, etc.
Multimeter 1) Fluke models 23, 83, 85, 87
Test and adjustment diagnostic equipment (oscilloscope) 1) BEAR DACE
1) Available through the MBUSA Standard Equipment Program.