Defender 90 (LD) V8-4.0L (1997)
Antitheft Relay: Customer Interest
Antitheft System - Dash Area Clicking Noise
WSM Section 86
Clicking in 10AS Control Unit
AFFECTED VEHICLE RANGE:
VA992105 to VA999484
VA100300 to VA126471
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.
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.
Time 0.70 hrs.
Replace 10AS ECU
FAULT CODE: Z
Normal warranty policy and procedures apply
REPLACE IMMOBILIZATION (ALARM) CONTROL UNIT
Refer to the procedure in Workshop Manual Section 86, Page 16, Operation 86.77.01.
Remove the 10AS unit from the vehicle.
Install the new 10AS (AMR6430A) and initialize with TestBook.