Preliminary work: Diagnosis - Diagnostic Trouble Code (DTC) Memory 12

Preparation for Test: Provide access to IRCL control module (N54). Provide access to supply pump, central locking system (M14/1 or M14/2) Connect socket box with test cable according to connection diagram, see 22 Figure 1. Electrical wiring diagrams See Electrical Troubleshooting Manual, Model 129, Volume 2.

Equipment

Multimeter 1)

Fluke models 23, 83, 85, 87

1) Available through the MBUSA Standard Equipment Program.