Clicking In 10AS Control Unit (86/03/98/NAS)
Publication date: 1998-07-17Reference number: 86/03/98/NAS
CLICKING IN 10AS CONTROL UNIT
TECHNICAL SERVICE BULLETIN
| LAND ROVER: | 1997 Defender |
| REFERENCE: | WSM Section 86 |
| ISSUE: | 1 |
| SECTION: | Electrical |
| AFFECTED VEHICLES: | 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
| P/N | Description |
|---|---|
| AMR6430A | Immobilization Unit |
WARRANTY CLAIMS
| SRO | Description | Time |
|---|---|---|
| 86.77.01 | Replace 10AS ECU | 0.70 hrs. |
FAULT CODE: Z
Normal warranty policy and procedures apply.
REPAIR PROCEDURE
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.