Hicas Faults

[xhxr6t]

Hey,

Before I get flammed I have done a lot of searching and reading over the last few weeks about this.

I just purchased a 95 gtst and the hicas light is allways on. I have done the diagnosis and has come up with;

24 Rear main sensor input not present

32 (Auto) Inhibititor switch input not present(Manual) Neutral switch input not present

I had the car on a hoist on the weekend, and looked over the hicas unit hoping to see a plug un done but had no luck.

The manual neutral switch input not present I have not looked at yet as I did the diagnosis after having it on the hoist. But im assuming there would be a plug on the gearbox with a loom heaing towards engine bay (not through the cab) which is hopefully un plugged.

I also noticed yesterday after following the car on the road, its crabbing.

I was planning on just cutting the wire for the light and putting a lock bar in, But I have roady booked in for friday so i cannot use a lock bar.

Any tips on clearing these two alarms? and stop the crabbing?

cheers!

Edited August 12, 2013 by xhxr6t

[xhxr6t]

Any ideas?

I pulled off all plugs on the hicas unit and cleaned with contact cleaner, un plugged the main unit and cleaned that connector but still getting the same faults.

I was wondering if it could be the hicas computer? as it had been removed and was just sitting next to the battery not mounted when i purchased the car.

[xhxr6t]

bump

[scotty nm35]

Sounds like you need to get it on a consult unit, then you can run proper diagnostics.

Have you moved the steering wheel or had an alignment done recently? The steering angle sensor can cause issues.

If you remove the Hicas unit and splash some mud on a matt black lockbar, you may get lucky for the roadworthy... Just tell them it's been there forever.

[xhxr6t]

Sounds like you need to get it on a consult unit, then you can run proper diagnostics.

Have you moved the steering wheel or had an alignment done recently? The steering angle sensor can cause issues.

If you remove the Hicas unit and splash some mud on a matt black lockbar, you may get lucky for the roadworthy... Just tell them it's been there forever.

Thanks for a reply!

I had been think I should have done that, I doubt the guy doing the roady knows anything about hicas.

I've looked into this a bit more and I think I'm getting somewhere.

I've read that in diagnosis mode the rear wheels should scroll from left to right continuously, But I have had a mate look and never seen them move. Which would explain the rear main sensor as it cannot see it moving,

Which brings me to think that either ,

A, the hicas motor has died, or

B, the computer has died.

So, I’ll put it back into diag mode tonight and meter the plug for the motor and see what I can see, hopefully that will tell me whats faulty!