Checking alarm function: Notes
Alarm function activation does not work. This means that the horn does not sound and the headlamps and turn signal lamps do not flash.
Cause of fault:
- No voltage to the alarm control module
- Non-functioning alarm control module
- Open-circuit or loose connections in the wiring between the alarm control module and the alarm button
- Short-circuit to ground in the reset button
- Faulty fuses.
Check that the alarm control module fuses are undamaged. These are located in the fusebox in the cargo compartment.
Checking the alarm control module
Check the alarm control module connectors. Check for loose connections, contact resistance and oxidation.
Check the cable between the alarm control module and the alarm button. Check for an open-circuit. Check for a short-circuit to ground.
Take readings between terminals #B1 and #B7. The voltage must be approximately 12 V.
Measure the voltage on the alarm control module connector terminal #B4. The voltage should be 12 V.
Checking the alarm button
Measure the voltage on alarm control module connector #A2 when the alarm button is pressed. The voltage must be approximately 12 V.
Measure the voltage on alarm control module connector #A2 when the alarm button is not pressed. The voltage must be approximately 0 V.
HINT: The alarm button is located under the steering column cover.
Checking the reset button
Disconnect the alarm control module 8 pin connector (connector B).
Check the cable between the reset button and connector #B6. Check for a short-circuit to ground.
Measure the resistance of the control module connector #B6 and chassis ground when the reset button is not pressed.
Resistance must be higher than 1 MΩ.
Measure the resistance of the control module connector #B6 when the reset button is pressed. The resistance must be approximately 0 Ω.
HINT: The reset button is located in the cowl in the engine compartment.
Remedy as necessary.
Other information
- For information about signals, see Signal specification, attack alarm control module
- To access or replace the alarm control module, see Replacing the attack alarm control module
- See Contents .
- Continue
Refer to Verification