Audio System II

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WIRING DIAGRAM

Audio System II: Component Location:

COMPONENT LOCATION VIEW

Audio System II: Component ID:

COMPONENT ID
16 Rheostat, lighting for controls and instruments, on the dashboard between the steering wheel and driver's door.
22A Main fuse board in the dashboard.
55 Luggage compartment lamp, in the luggage compartment on the left-hand side.
265 Motorized aerial, in the luggage compartment on the left-hand side.
266 Loudspeakers, two in the dashboard, two in the parcel shelf.
353 Radio-cassette player, in centre of dashboard.
355 CD player, in the luggage compartment on the left-hand side.
375 Mobile telephone connection.
540 Main instrument display panel on the dashboard.
541 SID unit in centre of dashboard.

2-Pin Connector
H2-43 Connector for motorized aerial in the luggage compartment, on the left-hand side.

10-Pin Connector
H10-4 On the bracket below the left-hand A pillar.

33-Pin Connector
H33-1 Grey connector on the bracket below the left-hand A pillar.

Grounding Points
G27 Grounding point, motorized aerial, on the aerial bracket.
G33P Grounding point, connector bracket (Power) below the left-hand A pillar.
G34P Grounding point, control module bracket (Power) below the right-hand A pillar.

DESCRIPTION OF OPERATION
A factory-fitted audio system is available for cars supplied to certain markets. It contains the following components:
^ Radio-cassette player 353
^ Loudspeakers 266
^ CD player 355 (option)
^ Motorized aerial 265

Power Supply
^ Radio-cassette player 353 is supplied with +30 circuit current on pin 4 of connector A and with +X circuit current (trigger signal) on pin 7 of connector A.
^ CD player 355 is supplied with current via radio-cassette player 353.

Grounding
^ Radio-cassette player 353 is grounded on pin 8 of connector A.
^ CD player 355 is grounded via radio-cassette player 353.

Radio-Cassette Player 353
The radio-cassette player has no radio display of its own but uses the SID unit's display for radio indication.

The radio-cassette player features AVC which uses speed information from main instrument display panel 540 to increase or reduce the volume when speed is increased or reduced.

If a mobile telephone is installed in the car, it can be connected so that the volume of the radio is lowered when the telephone is in use.

The "Mute" signal of the mobile telephone is then connected to terminal 2 (connector A) of the radio cassette player.

The front and rear loudspeakers are wired in connector B of the radio-cassette player as follows:
L Front
Pin 5: +
Pin 6: -

R front
Pin 3: +
Pin 4: -

L rear
Pin 7: +
Pin 8: +

R rear
Pin 1: +
Pin 2: -

CD Player 355
The CD player is an optional accessory and includes a changer holding up to 13 CDs. The CD player is operated from the radio-cassette player where all the controls are located. The CD player uses the SID unit's display to show the CD functions.

Motorized Aerial
In the luggage compartment on the left-hand side is a motorized aerial which is supplied with current via fuse 4 and grounded to the aerial bracket.

When the radio-cassette player is turned on, it sends a 12 V supply on pin 5 of connector A to the aerial's built-in relay, which then operates. The aerial motor raises the aerial.

When the radio-cassette is turned off, 12 V is no longer supplied to pin 5. The aerial's relay contacts then change and current is supplied to the aerial motor which retracts the aerial.

FAULT DIAGNOSIS HINTS
Via a diagnostics position in the radio-cassette player it is possible to see whether there are any diagnostic trouble codes. Since these are not stored, every function (radio, cassette and CD player) has to be checked separately.
1. Check that fuses 4, 13 and 9 are intact and supplied with current.
2. Check that the fuse at the rear of the radio-cassette player is intact.
3. Check the connectors, wiring harness and ground connections.