not valid.
1501 - short signal cable for the right wear sensor for the brake pads of the 1st front axle.
1502 - the measured value of wear of the brake pads of the 1st front axle is above the measuring range.
1503 - the measured value of wear of the brake pads of the 1st front axle is below the measuring range on the right.
1504 - open the signal cable of the right wear sensor for the brake pads of the 1st front axle.
1505 - the wear value of the brake pads of the 1st front axle to the right is not valid.
1601 - short to the signal line of the left 