Thread: Error code C1A96

Replace your brake light bulbs (plus others) with LED ones and you take one piece out of the equation .... here's a good place to get 'em.
Xenon HID Headlight Upgrade Kits from HIDS 4U - H7, H4, H1

cheers

I must admit with big boots on my big feet I have hit the brake and accelerator at the same time.

Originally Posted by Scouse

I believe the brake light switch fault can also be triggered by left foot braking.

If you brake with your left foot & accelerate with your right, any overlap can confuse hell out of the computers & they'll think the brake switch is at fault.

That is an interesting thought.

Heel and Toe braking/acceleration used to be a standard race car driving practice, and in some quarters, street driving as well. Even though I regard the 3 as part Race Truck, I would doubt LR would have designed for the possibility of both the brakes and accelerator being pushed at the same time. Maybe though, as when you are stuck in the snow, in the past with an automatic, often you have to get a spinning wheel to stop while you add power - maybe the anti-slip does that now but...

Toyota is as a result of recent concerns, introducing an interlock between the brake and accelerator pedals such that braking action overrides engine acceleration. I wonder how they are triggering the system? The brake switch would seem to be the easy way so I wonder what additional concerns might evolve.

I do understand other manufacturers already have the interlock on many of their new designs so I suppose Toyota will just copy one of those designs, hence I wonder just what signal triggers them.

I would say my 2005 LR3 does not have the interlock as I experimented a few months back when all this was in the news just to see if the interlock was already incorporated.

Originally Posted by shining

Thanks guys. I have got a fault code unit. Funny thing was I was getting a transmission fault, suspension lowered, no sports or command shift, seemed to have all gears though.
C1a96 is the only fault that was showing.???
Cheers

The suspension system is programmed to lower the suspension to a safe height (about access height) for any fault issued by ABS.

Originally Posted by bbyer

That is an interesting thought.

Heel and Toe braking/acceleration used to be a standard race car driving practice, and in some quarters, street driving as well. Even though I regard the 3 as part Race Truck, I would doubt LR would have designed for the possibility of both the brakes and accelerator being pushed at the same time. Maybe though, as when you are stuck in the snow, in the past with an automatic, often you have to get a spinning wheel to stop while you add power - maybe the anti-slip does that now but...

Not sure that statement is true. A very legitimate driving technique for steep downhill descents (without using the HDC mode) is to brake reasonably hard with the left foot and then drive through the braking with the accellerator to keep slow but controlled downhill momentum.
I've done this on training days with no adverse affect or error codes coming up.

I have though had the faults listed above on an irregular basis with nothing ever being found and it always clears itself after a few restarts.

Originally Posted by Ashes

Not sure that statement is true. A very legitimate driving technique for steep downhill descents (without using the HDC mode) is to brake reasonably hard with the left foot and then drive through the braking with the accelerator to keep slow but controlled downhill momentum.
I've done this on training days with no adverse affect or error codes coming up.

I have though had the faults listed above on an irregular basis with nothing ever being found and it always clears itself after a few restarts.

Yes I agree, one foot on brake and the other on the accelerator tends to work on two wheel drive going uphill to keep a wheel on one side from starting to spin; also when stuck with an automatic RWD and I guess a FWD as well - but not much experience with that.

Once all these safety interlocks become standard, about all one will be able to do is move forward in paved dry surfaces unless maybe you have a Land Rover.

are you actuly getting eny lights on the dash or just getting a code with no sympoms,

Originally Posted by Ashes

Not sure that statement is true.

It doesn't happen all the time but it does happen. Would a Land Rover bulletin convince you?






ReferenceSSM48997ModelsDiscovery 4
Discovery 3
Range Rover Sport
TitleDTC’s P0504-00/27/62, P0724-17 and C1A96-64 CategoryDriveabilityLast modified15-Apr-2011 00:00:00Symptom614000 Lack/Loss of PowerContent
Issue:
Customer complains that various warning lights (ABS, DSC) illuminate on the instrument cluster, the cruise control system may also be inoperative. Upon diagnostic investigation some of the following DTC’s maybe stored P0504-00/27/62, P0724-17, (PCM) and C1A96-64 (ABS ECU).
NOTE: DIESEL only – Engine system fault maybe displayed on the instrument cluster message centre, warning the driver that the engine has gone into restricted performance mode. This can be cleared by cycling the ignition.
Cause:
1) Left foot braking/resting left foot on the brake pedal then applying the throttle pedal whilst the left foot is still on the brake pedal. This may result in warning lights illuminated on the instrument cluster and for DIESEL models maybe accompanied with an engine system fault message displayed on the instrument cluster message centre.
2) Brake pedal position switch set incorrectly or brake switch circuit concern, i.e. the switch is detecting the brake pedal is applied when it is not. This will result in warning lights illuminated on the instrument cluster with no other symptoms evident.
Action:
Should a customer express concern regarding the above stated issue please check the integrity of the brake switch circuit and carry out the Brake Pedal Position (BPP) switch check (the specification is that the stop lamps should illuminate at between 5.5mm and 8.5mm brake pedal travel), refer to TOPIx Workshop Manual section 417-01 > General Procedures > Brake Pedal Position (BPP) Switch Adjustment.
NOTE: If the brake pedal switch specification is found to be out of tolerance please record the brake travel measurement and submit a Quality Concern EPQR. To allow consistent collection of data please submit the EPQR under Module - engine control, Engine lacks power will not accelerate as expected.
If the brake switch is correctly set and no issue is identified within the brake switch circuit then the concern is likely to be associated with the driver left foot braking/resting their left foot on the brake pedal whilst then applying the throttle pedal.
PLEASE NOTE - It is not good driving practice to ‘apply’ the brake pedal with the left foot. The driver of the vehicle should be advised to use the left foot rest adjacent to the brake pedal to avoid further potential occurrences of this problem in the future.