AN82.61-P-0001-06TXC Retrofit MOST Fiber Optic Cable Wiring Harness
AN82.61-P-0001-06TXC Retrofit MOST Fiber Optic Cable Wiring Harness
Component Identification:
Converting the new MOST fiber optic cable wiring harness
1 Unclip blue retaining clip (26) from the black, 2-pin MOST coupling (25).
2 Unclip cover (23) of supplied fiber optic cable connector (MOST) (X39/50).
3 Remove fiber optic cable modules (25a, 25b) from black, 2-pin coupling (25) and install in fiber optic cable connector (MOST) (X39/50).
Black 2-pin coupling (25) is no longer needed.
4 Clip cover (23) onto fiber optic cable connector (MOST) (X39/50).
Component Identification:
Conversion in left rear wheelhouse
5 Insert black, 4-pin coupling (6) from auto pilot system wiring harness (1) into black, 6-pin coupling housing (8) of MOST fiber optic cable wiring harness (7).
Coupling housing (8) is from audio gateway control unit (N93/1). An arrow is located at the side of the black, 4-pin coupling (6). This corresponds to the direction of installation into the coupling housing (8).
6 Connect black, 6-pin coupling (8) to audio gateway control unit (N93/1).
7 Fasten MOST fiber optic cable wiring harness (7) as per picture to existing lines on left wheelhouse.
The green color coding on the MOST fiber optic cable wiring harness (7) must line up with the green color coding of the standard wiring harnesses (see arrow
8 Route MOST fiber optic cable wiring harness (7) further to cable duct in left rear footwell.
Shown on model 211.2
Component Identification:
9 Expose the on-board fiber optic cable connector (MOST) (X39/50) in the area of the left rear door cable duct.
Depending on the vehicle equipment, one or two MOST fiber optic cable connectors may be present.
On the end of each fiber optic cable module there is an identification label with the number or the number of the fiber optic cable module is printed on the end of it. Make sure that the individual fiber optic cable modules are correctly reassigned.
The numbering of the fiber optic cables at the fiber optic cable connectors varies according to the vehicle equipment. The MOST fiber optic cable takes the form of a ring. When a ring subscriber is being retrofitted, the connectors must always be reassigned so that they are in numerically ascending order (see example in "Target column" of table 1).
Table 1 on the right-hand side lists the following example:
^ There are two existing connectors X39/50 with the number pairs "4 + 13" and "19 + 37".
^ Two new fiber optic cables with the numbers "25" and "31" are to be added to the ring.
^ The new fiber optic cable with number "25" must be in the existing connector with numbers "19 + 37" and this becomes the connector with numbers "19 + 25" .
^ The new fiber optic cable with the number "31" and the existing fiber optic cable with the number "37" become connector number "31 + 37".
^ All connectors are in numerically ascending order.
Table 1:
10.1 Procedure for retrofitting a ring subscriber with "two" existing connectors
- Enter the number pairs of the existing connectors in the "Actual" column of Table 2.
- Enter the numbers of the existing individual fiber optic cables in the "Actual" column of Table 2.
- Enter the numbers of the individual fiber optic cables in numerically ascending order one under the other in "Nominal" Table 2 (see example in Table 1).
- Open the existing connector (according to "Actual" Table 2) and combine with the individual fiber optic cables to form two new connectors.
In the example the connector with number pair "19 + 37" must be opened so that the individual fiber optic cables can be installed in numerically ascending order.
Table 2:
10.2 Procedure for retrofitting a new ring subscriber with "one" existing connector
- Enter the number pair of the existing connector in the "Actual" column of Table 2.
The table "2nd existing connector" is not required if there is only one connector.
- Enter the numbers of the existing individual fiber optic cables in the "Actual" column of Table 2.
- Enter the numbers of the individual fiber optic cables in numerically ascending order one under the other in "Nominal" Table 2 (see example in Table 1).
- Open the existing connector (according to "Actual" Table 2) and combine with the individual fiber optic cables to form a new connector.
Reassigning fiber optic cables
11 Unclip cover (14) of fiber optic cable connector (MOST) (X39/50).
12 Press catch lug (15) of fiber optic cable connector (MOST) (X39/50) outwards slightly and pull fiber optic cable module out of fiber optic cable connector (MOST) (X39/50) in direction of arrow.
13 Remove dust caps from fiber optic cable modules.
14 Insert fiber optic cable module in connector.
The fiber optic cable module must be heard to engage.
15 Clip cover (14) onto fiber optic cable connector (MOST) (X39/50).
16 Route the fiber optic cable connector (MOST) (X39/50) into the cable duct in the area of the left rear door.
Risk of breakage: Do not kink or stretch fiber optic cables and do not route them over sharp edges. The bending radius must not be smaller than 25 mm. Clamps or cable ties for securing the fiber optic cables must not be fastened too tightly.
