Hi everyone
My name is Gideon and I'm from Israel.
I have a JAG XJ8 3.5L 2005 model
I recently yellow lamp lit and the system informs me (CATS SYSTEM FAULT)
I hooked up a scanner and I got fault code C1457
It says - ACCELEROMETER FRONT - CIRCUIT SHORT TO GROUND
When the lamp is on, the car hard and jump drive
Lamp is not lit constantly and when she is not on, the car travels without jumping soft.
My questions
1. Where is the place part (accelerometer front)?
2. Could it be a loose connection in one of the connections?
3. What else should I check before I replace it?
Regards
Gideon

 

Hi Gideon

The front accelerometer is located in the RH wheel arch behind the wheel arch liner. Your fault indicates it is shorting to earth somehow, so certainly needs checking out. The CATS system is able to switch dampers to 'Soft' setting, the default being 'Hard'. It does this by putting volts onto the line to a shock. With no volts to the shocks they default to 'Hard'. If CATS gets a fault with a component of the system it defaults to 'Hard' as you have found out.

 

Hey Mitchell
Thanks for the helpful explanation.
After reforming it, keep you posted

 

Hello again everyone
Today disconnects the plug from accelerometer front unit to see if the fault code has changed (if the problem is within the component so
As soon as I hang up then the problem disappears or changes)
I hooked up the scanner and I got the same code C1457 and the problem has not disappeared.
All wires Harness complete and properly (by eye).
I'd love to get more ideas about the problem and its solution.
Regards
Gideon Kidron

 

Check your earth ground up front (I believe behind the bumper) - considering your fault is "short to ground" that should be your starting point. Search "earth ground" on the forum and read up on the topic as it's an interesting read.

Disconnecting the part will not make the code go away.

 

Hi abonano,

The earth/ground point had initially occurred to me too, but the wires connected to the ground stud are supposed to be connected to ground. A short to ground means something is touching ground where it shouldn't, and it would seem more likely to occur somewhere other than the ground point.

Some possible causes of a short to ground could be corrosion bridging pins inside the electrical connector, or the wiring harness rubbing across something in the chassis or suspension and wearing through the insulation to bare wire.

Cheers,

Don

 

Thanks abonano and don,
I thought so
This corrosion on the pins or wire torn or worn.
I not found evidence of it and the pins are clean and no corrosion
Fault code sends me directly to the unit accelerometer front or its connections.
Where I was able to find electric schema of this vehicle.
I will teach the grounding of this vehicle.
This morning when I moved the car and drove about 10 kilometers, the system worked properly and the lamp was turned off.
In the afternoon (temperature of 31 ° C) when only opened the Switch bulb was lit and I received the call "CATS SYSTEM FAULT" And over again inhibit become hard.

 

The phenomenon has become strange.
Starting first in the morning, the system works properly and everything is normal. Drive about 10 K.
Car does not move all day. Afternoon I open the ignition switch, the yellow light is on, show me the problem. (CATS SYSTEM FAULT) code C1457.
And it stays on until I parked for the night.
The next morning, again no fault and everything is normal until afternoon