145 - MiTo   1.4 16v TJet   ALARM SIREN NOT WORKING   A015   


 

 

TEST RESULTS

 

1

 

CHECK USING DIAGNOSTIC EQUIPMENT

 

ALL OK

 

PROBLEMS ENCOUNTERED

 

ACTION

 

 

Connect the Examiner equipment to the diagnostic socket and check at the body computer node in the alarm memory for:

ยท Possible presence of errors

 

Move on to Step 2

 

1. Volumetric protection activated

2. Anti-tilt protection activated

3. Presence of errors

 

1. Move on to Step 2

2. Move on to Step 3

3. Proceed as instructed by the diagnostic equipment

 

2

 

VOLUMETRIC PROTECTION CHECK

 

ALL OK

 

PROBLEMS ENCOUNTERED

 

ACTION

 

 

Check that no insect has entered the passenger compartment that could have moved around to set off the alarm or any moving object that may have been detected by the ultrasound sensors.

Check that the vehicle windows are properly shut, especially if there are strong winds.

 

Move on to Step 3

 

1. Insect in the passenger compartment that is detected by the ultrasound sensors when it moves around.

2. Vehicle windows open when there are strong winds.

 

1. Remove the cause of the alarm activation.

2. Close the car windows.

 

3

 

ANTI-TILT/ULTRASOUND PROTECTION CHECK

 

ALL OK

 

PROBLEMS ENCOUNTERED

 

ACTION

 

 

Connect the Examiner diagnostic equipment to the diagnostic socket and check the body computer node in active diagnosis mode to ensure that the ultrasound and anti-tilt sensors are working properly.

Connect the Examiner diagnostic equipment to the diagnostic socket and check the body computer node in active diagnosis mode to ensure correct operation

 

Move on to Step 4

 

1. Anti-tilt sensor faulty

2. Ultrasound faulty

 

1. Replace the anti-tilt and ultrasound sensors module

2. Replace the anti-tilt and ultrasound sensors module

 

4

 

PERIPHERAL PROTECTION CHECK

 

ALL OK

 

PROBLEMS ENCOUNTERED

 

ACTION

 

 

Connect the Examiner diagnostic equipment to the diagnostic socket and check at the body computer node that the microswitches for the doors, bonnet and boot are working properly. In particular, check that there are no problems when the doors are closed

 

Move on to Step 5

 

Peripheral microswitch faulty

 

Replace the faulty lock.

 

5

 

CHECK USING DIAGNOSTIC EQUIPMENT

 

ALL OK

 

PROBLEMS ENCOUNTERED

 

ACTION

 

 

Connect the Examiner diagnostic equipment to the diagnostic socket and check the condition of the A-Bus serial line between the Body Computer Node and the siren at the Body Computer Node in active diagnosis

 See Test 5580EB SIREN OPERATION CHECK

 

Move on to Step 6

 

Fault at A-BUS serial line

 

Restore the A-BUS serial line to correct operation

 See E7015 ALARM

 

6

 

SIREN POWER SUPPLY CHECK

 

ALL OK

 

PROBLEMS ENCOUNTERED

 

ACTION

 

 

Check that the siren power supply is correct and check the condition of the connections

 See Test 5580EB SIREN OPERATION CHECK

 

End of diagnosis

 

1. Power supply for the siren not correct due to a drop in voltage in the wiring

2. Vehicle battery run down (voltage below 8 Volts)

3. Body Computer defective

 

1. Restore the correct power supply

 See E7015 ALARM

2. Recharge the battery

3. Replace the body computer

 Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.

If it is not possible to stop the siren and deactivate the alarm using the remote control, simply turn the key to the ON position.

The system can recognize the transponder and deactivate the alarm system.

With the alarm on, the alarm cycles are set off without any apparent cause and without any attempts to break into the vehicle.