Porshe 911 (997). Manual - part 1090

MOST control units, variant A - B - E - F, shown on the 911

MOST control units, variant A - B - E - F

A

- Radio/PCM

B

- Connection point interior/luggage compartment

E

- Navigation unit

F

- Telephone control module

Installing optical waveguide

Disconnecting optical waveguide

Note

Observe the general information on optical waveguides. → General information on optical waveguides -
MOST bus

ATTENTION

Risk of destruction when removing electric components with the ignition on.

→ Switch off ignition and remove ignition key.

1.

Disconnecting connector for optical waveguide

Diagnostic system: reading out fault memory and activating systems

 Installing optical waveguide

4517

2. Release the connectors of the damaged optical waveguides on the affected components -Arrow a-

and disconnect them. The illustration shows the connector on the CD changer as an example.

3. Cut off the connector of the damaged optical waveguide, isolate it and tie it to the main wire harness.

Removing and installing optical contacts on connector side

Unlocking secondary locking of the optical contacts (connector side)

1. Open the secondary locking mechanism using the press-out and unlocking tools for tab and round plug

connectors of all sizes NR.155

. Insert the tool in the opening provided and lift the locking mechanism.

The locking mechanism engages in the upper position.

Unlocking primary locking of the optical contacts (connector side)

2. Position the press-out and unlocking tools for tab and round plug connectors of all sizes NR.155 on

the primary locking mechanism and lift the locking mechanism.

A

- Optical contact, grey

B

- Optical contact, black

3. Carefully pull on the optical waveguide -A and B- in -direction of arrow- . If it is not possible to pull out

the optical waveguide, check again if the secondary locking mechanism is completely released and if the
primary locking mechanism is raised sufficiently.

Perform visual inspection of locking mechanisms, connector housings and contacts for possible damage, and
exchange the damaged parts, if necessary.

Diagnostic system: reading out fault memory and activating systems

Disconnecting optical waveguide

4518

Installing optical contacts on connector side

Remove the dust boot right before plugging.
Check the proper condition of the contacts.

Locking primary locking of the optical contacts (connector side)

1. Insert the optical contact -A and B- in the connector until it engages

audibly.

A

- Optical contact, grey

B

- Optical contact, black

Locking secondary locking of the optical contacts (connector side)

2. Lock the secondary locking and check the optical contacts for

tightness.

Removing and installing optical contacts on socket side

Diagnostic system: reading out fault memory and activating systems

Installing optical contacts on connector side

4519

Unlocking spring cap of the optical contacts (on the socket side)

1. Release the spring cap on both sides using the press-out and unlocking tools for tab and round

plug connectors of all sizes NR.155

 and remove it.

2. Remove optical waveguide module from connector.

Unlocking contact locking of the optical contacts (on the socket side)

3. Position the press-out and unlocking tools for flat-type and round plug connectors of all sizes NR.155

for releasing the contact locking mechanism of the optical waveguide module and lift up the locking
mechanism.

A

- Optical contact, grey

B

- Optical contact, black

4. Carefully pull on the optical waveguide -A and B- in -direction of arrow- . If it is not possible to pull out

the optical waveguide, check again if the locking mechanism is completely released.

Perform visual inspection of locking mechanisms, connector housings and contacts for possible damage, and
exchange the damaged parts, if necessary.

Installing optical contacts on socket side

Remove the dust boot right before plugging.
Check the proper condition of the contact.
At a force of 10 N (7.5 lb.) the springs installed in the connection point will be compressed. This leads to an
increase in attenuation, which could lead to system impairment and system failure. Therefore a maximum
force of 10 N (7.5 lb.) may be used to pull on optical waveguides at connection points.

Locking contact locking of the optical contacts (on the socket side)

1. Insert optical contact -B- into the optical waveguide module until it is felt to engage, and check the optical

contact is seated securely.

A

- Optical contact, grey

Diagnostic system: reading out fault memory and activating systems

Removing and installing optical contacts on socket side

4520