Alarm System - Inoperative or Malfunctions

Group: 90

Number: 93-07

Date: June 1, 1993

Subject:
Alarm system Inoperative or malfunctions

Model(s):
Passat/Corrado from 1991 m.y.

Condition





Alarm system is inoperative or malfunctions. Symptom is cause by wiring or component problem.

Service

Verify system operation.

Do not replace alarm system control module (J284) before testing complete system.

Test Conditions:

-Trunk lid/rear hatch closed

-Doors closed

-Battery voltage OK

-Fuses OK

Alarm is set when:

Locking either front door with ignition key. Must be held in the lock position for more than 0.5 seconds.

System readiness indicated by:

1991,1992 m.y.: alarm horn beeps From 1993 m.y.: LED in driver's door flashes

After 30 second delay system is operational. Alarm activates if:

-Door, trunk or rear lid opened

-Ignition switched on

-Radio is removed (From 1993 m.y. only)














Test Procedure
-Disconnect battery ground strap

-Remove appropriate interior trim to gain access to alarm system control module

-Remove 6 and 10 pin connectors from alarm control module

All measurements are performed with (US 11 19) multimeter

Refer to the correct wiring diagram as needed

-If all tests OK, replace alarm system ECM

-Reinstall and tighten battery ground strap

-Reinstall interior trim