ASC System - Inoperative

SECTION
3

GROUP
37

NO.
811

DATE
Aug. 1996

Active Sound Control system (ASC) not working

850

REFERENCE: TP 3501201, LIGHTING, INSTRUMENTS AND OTHER ELECTRICAL COMPONENTS; 850 1992- Replacing Active Sound Control wire harness

Warning!
Particular care must be taken when carrying out repairs to cars equipped with SRS. For further information, refer to appropriate service manual.

The Active Sound Control system (ASC) automatically increases and decreases the volume of the car's sound system with the speed of the car. This function is available with the SC-815.

If a customer complains that the ASC system does not work first check that the customer has switched on the function on the radio. ASC should appear in the display. If ASC is displayed and the function still does not work, check that the car is in the specified chassis number range and is equipped with a separate 4x40W or 4x50W amplifier.

If this is so, there is a wire missing in the wire harness between the radio and the amplifier. The fault can be remedied by replacing the wire harness between the radio and amplifier.

The following variants are affected:





Required components:

Wire harness (4x40 W) 1 9442352-2
Wire harness (4x50 W) 1 6816303-9
Foam rubber 1 3523742-9

Method of replacing wire harness





Remove:

- screws (1)
- passenger side soundproofing panel (2).

Remove:





- screws (1) at passenger side center console
- plastic panel (2).

Fold back carpet by the center console.

Remove:

- radio from center console.
- all connectors from back of radio.

Remove:





- amplifier from bracket by undoing two screws (1).
- 14-pin connector (2) and DIN-wire (3) from amplifier.

Remove:





- Foam rubber (1) on connectors between wire harness and car.
- Wire harness (2) between radio and amplifier.

Note how the wire harness is routed. Route the new wire harness in the same way.

Connect:





- the new wire harness connector (1) and DIN-wire (2) to the amplifier.

Ensure that the 14-pin connector (1) is locked.

Install:





- amplifier in bracket and tighten screws in bracket.

Install:





- the new wire harness. Route it to the radio compartment the same way as the old one.

Connect to car:

- 14-pin connector (B) to car (D).
- 10-pin connector (C) to car (E).

Ensure that connectors are locked.

Install:





- Foam rubber (A) P/N 3523742-9 over connectors to minimize rattling.

Connect to radio:





- 10-pin connector (F)
- 14-pin connector (G)
- DIN-wire
- Antenna wire
- (CD wire)

Reinstall components:

- radio in center console
- floor carpet by center console
- plastic panel by passenger side center console
- soundproofing panel

Enter anti-theft radio code

Check:

- Test drive car and check that ASC works. (see description of functions).

WARRANTY STATEMENT: Claims may be submitted under the New Car Limited Warranty when a manufacturing defect is present using claim type: 01

Operation No. Labor description Time allowance

39512-2 Replacing wire harness radio - amplifier 0.3 hr.