97722300 Installing optical waveguide (PCM to loudspeaker amplifier)
WM 977223 Installing optical waveguide (PCM to loudspeaker amplifier)
Information
MOST control units A - B:
MOST control units A - B
Preliminary work
Information
Release the main wire harness only until the damaged optical waveguide has been released and the new optical waveguide can be attached to the main wire harness.
1. Remove dashboard.
-> 701819 Removing and installing dashboard - section on "Removing" 701819 Removing and installing dashboard
2. Remove loudspeaker amplifier.
-> 914419 Removing and installing loudspeaker amplifier - section on "Removing" Service and Repair
Installing optical waveguide (PCM to loudspeaker amplifier)
Disconnecting optical waveguide
NOTICE
Voltage peaks
- Risk of damage to load or to the control unit
-> Remove the ignition key and switch off load before disconnecting or removing load.
Information
Observe the general information on optical waveguides. => General information on optical waveguides - MOST bus
Information
Before routing a new optical waveguide:
- Visually check the locks, connector housing and contacts for damage.
- Replace damaged parts if necessary.
1. Release and unplug the optical waveguide connector at the loudspeaker amplifier.
Unplugging optical waveguide at the loudspeaker amplifier
2. Release and unplug the optical waveguide connector at the PCM system.
Unplugging optical waveguide at the PCM system
Installing optical contacts on connector side
Remove the dust boot right before plugging.
Check the proper condition of the contacts.
1. Insert the optical contact -A and B- in the connector until it engages audibly.
Locking primary locking of the optical contacts (connector side)
2. Lock the secondary locking and check the optical contacts for tightness.
Locking secondary locking of the optical contacts (connector side)
Installing optical waveguide (PCM to loudspeaker amplifier)
NOTICE
Voltage peaks
- Risk of damage to load or to the control unit
-> Remove the ignition key and switch off load before disconnecting or removing load.
Information
- The new lines will be secured to the fastening points for the old lines.
- The old wire harness remains installed in the vehicle.
- The old wire harness will only be disconnected/unplugged directly at the connected components.
Information
- When installing the wire harness, make sure the insulation of the line is not damaged.
Information
The range of spare parts available for optical waveguides depends on the vehicle equipment. Depending on the vehicle equipment, there is a specific set containing the individual optical waveguides.
Select the required optical waveguide and remove it from the set.
Information
Before routing a new optical waveguide:
- Visually check the locks, connector housing and contacts for damage.
- Replace damaged parts if necessary.
1. Cut off the optical contacts of the damaged optical waveguide, isolate it and tie it to the main wire harness.
2. Route the new optical waveguide along the main wire harness, guide it through the existing cable ducts and tie it to the main wire harness using tie-wraps (shown as an example).
Routing and securing optical waveguide
3. Plug in the optical waveguide connector at the loudspeaker amplifier and make sure that the locking mechanism engages securely.
Plugging in optical waveguide at the loudspeaker amplifier
4. Plug in the optical waveguide connector at the PCM system and make sure that the locking mechanism engages securely.
Plugging in optical waveguide at the PCM system
Subsequent work
1. Install loudspeaker amplifier.
-> 914419 Removing and installing loudspeaker amplifier - section on "Installing" Service and Repair
2. Install dashboard.
-> 701819 Removing and installing dashboard - section on "Installing" 701819 Removing and installing dashboard