Antitheft System - Dash Area Clicking Noise

No: 86/03/98/NAS
Ref: WSM Section 86
Issue: 1
Date: 07/17/98

Clicking in 10AS Control Unit

AFFECTED VEHICLE RANGE:

DEFENDER (LD) VA992105 to VA999484
VA100300 to VA126471

SITUATION:

INTERMITTENT CLICKING NOISE FROM DASHBOARD

An intermittent clicking noise may be heard coming from the dashboard on some '97 model year Defenders. The clicking noise sounds very similar to a turn signal flasher in frequency and loudness. Once the clicking noise begins, it will continue until the ignition switch is cycled off and then on again. The source of the clicking noise is a relay within the immobilization control unit (10AS unit). A revised unit is now available to address this symptom.

RESOLUTION:

REPLACE IMMOBILIZATION UNIT

To address a customer complaint matching the above description, verify that the source of the clicking noise is the alarm ECU and replace the unit with the latest type.

PARTS INFORMATION:

AMR6430A Immobilization Unit

WARRANTY CLAIMS:

86.77.01 Time 0.70 hrs.
Replace 10AS ECU

FAULT CODE: Z

Normal warranty policy and procedures apply

REPAIR PROCEDURE:

REPLACE IMMOBILIZATION (ALARM) CONTROL UNIT

1. Refer to the procedure in Workshop Manual Section 86, Page 16, Operation 86.77.01.

2. Remove the 10AS unit from the vehicle.

3. Install the new 10AS (AMR6430A) and initialize with TestBook.