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STEP |
CHECK TO BE PERFORMED |
REMEDIAL ACTION IF THE CHECK IS NOT OK |
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1 |
Siren power supply check Connect an Examiner in Voltmeter mode with the positive probe to pin 1 ( +30 ) and the negative earthed and read a direct voltage of approximately 12 Volt |
Restore the wiring between the Body Computer node and the siren control unit at pin 1. Replace fuse F39 in the dashboard control unit, having ascertained what caused it to blow |
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2 |
A-Bus serial line check Disconnect the wiring connector for the siren and the Body Computer connector Connect an Examiner in Ohmmeter mode. Check the continuity of the wiring between pin 2 of the siren connector and the Body Computer. Check the insulation of the earth line |
Restore wiring continuity Restore wiring insulation If the checks at points 1 and 2 give normal results Replace the siren Op. 5580E40 ANTI-THEFT DEVICE SIREN - R+R If the siren is OK, replace the Body Computer |
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3 |
Check the earth connection Disconnect the wiring connector for the siren Connect an Examiner in Ohmmeter mode between pin 3 and earth, and check that the resistance is less than 1 Ohm |
Restore the correct earth connection (left front engine compartment) |
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Siren pin out |
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Pin 1 |
Fuel system |
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Pin 2 |
Serial line |
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Pin 3 |
Earth |
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Pin 4 |
N.C. |
Siren