61 35 502 Replacing trailer module (09/2006-03/2009)

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NOTE: From 03/2009 trailer module AHM3+ will be replaced by trailer module AHM4R.

Plug connectors and associated pin assignments must be adapted if the old plug connector AHM3(+) is fitted.

Plug connector, new AHM4
Plug connector, old AHM3(+)

Fig 1: Identifying Plug Connector Models

Courtesy of BMW OF NORTH AMERICA, INC.

Necessary preliminary tasks:

Remove TRAILER MODULE

From build date/version 03/2007 Series E60/61:

Installation:

Cut out device holder up to marking (1).

Cut out indentation in area (2).

Make sure AHM module is exactly seated and wiring harness is correctly routed.

Fig 2: Identifying Marking On Device Holder

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Positions of plugs and associated pin assignments are set out in the diagnosis system.

The repair instruction represents the highest vehicle configuration. Pin assignments of plug connections may be absent if optional equipments are not fitted.

Special tools for disconnecting:

Secondary lock:

Special tool 61 0 324

Primary lock:

Special tool 61 0 316

Special tool for crimping:

Double flat spring contact:

Crimping tool special tool 61 0 202 (crimping tool) with special tool 61 0 230 (matrix)

For information about special tools used in this procedure, see GENERAL ELECTRICAL SYSTEM - SPECIAL TOOLS .

SPECIAL TOOL FOR CRIMPING REFERENCE CHART

(09/2006 - 03/2009)
Previously AHM3(+)		New AHM4R
Pin no.	Contact (mm² )	Pin no.	Contact (mm² )
1	2.8	13	2.8
2	2.8	20	2.8
3	0.63	-	-
4	0.63	17	0.63
5	0.63	2	0.63
6	0.63	3	0.63
7	0.63	11	0.63
8	0.63	9	0.63
9	0.63	10	0.63
10	0.63	18	2.8
Recrimp contact from 0.63 mm² to 2.8 mm²
11	0.63	14	2.8
Recrimp contact from 0.63 mm² to 2.8 mm²
12	0.63	15	2.8
Recrimp contact from 0.63 mm² to 2.8 mm²
13	0.63	19	2.8
Recrimp contact from 0.63 mm² to 2.8 mm²
14	0.63	12	2.8
Recrimp contact from 0.63 mm² to 2.8 mm²
15	0.63	16	0.63
16	0.63	1	2.8
Recrimp contact from 0.63 mm² to 2.8 mm²
-	-	4-8	0.63

Carry out VEHICLE PROGRAMMING/CODING .