Oui car le voltage de secours doit ?tre d'au moins 16V. Il est possible qu'une batterie faible ne permette pas d'atteindre ce seuil.
Sinon j'ai trouvé ça, si tu parles anglais:
BACK-UP POWER SUPPLY -- VOLTAGE BOOST FAULT FAULT CODE 52
Normal Operation
A backup power supply is contained within the air bag diagnostic monitor that consists of four capacitors and a voltage boost circuit. The voltage boost circuit charges the capacitors to 16-19 volts when the air bag diagnostic monitor is turned to ON. The backup power supply is connected through a diode to the air bag diagnostic monitor pin 15 (circuit 951 "GN/Y"). The resistance of circuit 951 should have infinite (open) resistance to ground. The air bag diagnostic monitor measures the voltage on the backup power supply capacitors. If the voltage on the capacitors does not reach a minimum of 16 volts after approximately 45 seconds, the air bag diagnostic monitor will flash a code 52 to indicate low voltage in the backup power supply voltage boost circuit.
Possible Causes
Low backup power supply voltage can be cause by:
l Resistance on circuit 951 ("GN/Y") to ground. Resistance to ground on circuit 951 ("GN/Y") or circuit 943 ("GN/BK") will cause the backup power supply capacitors to discharge and the boost circuit will not be able to boost the voltage.
l Boost circuit failure within the air bag diagnostic monitor. If the voltage boost circuit in the air bag diagnostic monitor is faulty it will not be able to raise the backup power supply voltage on the capacitor.
Electrical Schematic -- Back-Up Power Supply -- Voltage Boost Fault Fault Code 52
? 52-1: VERIFY CONDITION
? 52-2: CHECK BACK-UP POWER SUPPLY FAULT
? 52-3: CHECK FOR SHORT TO GROUND IN CIRCUIT 951
? 52-4: CHECK FOR SHORT TO GROUND IN CIRCUIT 943
I am home now and looking at a Air Bag Diagnostic Monitor circuit board. Just as I thought the 4 capacitors are on this board. There are 4 standard 25volt, 2200micro farad capacitors that I'm sure you can get at your local Radio Shack.
If you have a small soldering iron and a solder sucker or some solder wick I'm sure you could unsolder the 4 caps on the board and solder in new ones.
If I can figure out how to post a picture, I will photograph the circuit board with my Digital camera so you can see what your up against and post it.
If you would like 51-1, 52-2 52-3 or 52-4 procedures listed above let me know and I will post them.
I
Don't unplug or work on air bags unless the battery is disconnected and 1 minute wait period is over. I would be safe and sit back and enjoy a beer just to make sure that they don't go off. Possible serious injuries if in the wrong place at the right time!!!!!!!
Diagnostic Monitor, Air Bag
Removal
The air bag diagnostic monitor (14B056) has a blue casing and is located underneath the driver's side of the instrument panel near the speed control amplifier.
1. WARNING: THE BACKUP POWER SUPPLY ENERGY MUST BE DEPLETED BEFORE ANY AIR BAG COMPONENT SERVICE IS PERFORMED. TO DEPLETE THE BACKUP POWER SUPPLY ENERGY, DISCONNECT THE BATTERY GROUND CABLE (14301) AND WAIT ONE MINUTE.
Disconnect the battery ground cable and wait one minute for the backup power supply energy to be depleted.
2. Disconnect the two air bag diagnostic monitor electrical connectors.
3. Slide the air bag diagnostic monitor out of the mounting bracket.
Installation
To install, reverse the removal procedure.
Verify that the air bag warning indicator is operative.