As always with ChatGPT, having at least some knowledge about the topic is essential to weed out the bull**** and LLM hallucinations.
You have to pretty much already know what you want to know to see through the confident bull****.
How do you bleed the AHC on a LHD 100 series?
Using
100 Series GPT
The AHC system has
bleeder valves located near each strut (suspension component).
- Loosen the bleeder valve slightly using a wrench and watch for fluid to come out.
- While the fluid flows, have an assistant raise and lower the AHC system to help purge air from the lines.
Not a word about the vehicle dropping in height when loosening the bleed valve which is super important and potentially dangerous.
LC GPT 2.0 had the least detailed response, including gems such as
Use a vacuum pump or Toyota diagnostic tool to pressurize the system and remove air from the hydraulic fluid.
Otherwise it spit out generic bleeding instructions, which could just as well have been about brakes.
ih8mud GPT had the most detailed response. Also the most wrong
- Engage the parking brake and make sure the vehicle is secure.
- Raise the vehicle with a jack and support it with jack stands if necessary, especially if you need access to suspension components.
Again with the assistant cycling the system while the bleed valve is opened
- Have an assistant sit inside the vehicle and turn the ignition to "ON" (engine running is typically required for AHC operation).
- Cycle the AHC through its height settings (Lo, Normal, Hi) to help push the air out of the system.
- As the system cycles, fluid will be pushed through the lines. Continue bleeding until no air bubbles are visible in the clear tubing.
Another attempt with the needle bearing
How do I remove the front knuckle needle bearing?
Using
100 Series GPT
- No mention of the hub flange nuts
- Instructs me to remove the axle shaft nut and then the CV snap ring
- Instructs me to then extract the needle bearing, mistaking it for a wheel bearing.
- No mention of the CV axle, disconnecting the ball joints, etc, etc
LC GPT 2.0 again had the shortest answer, like 20 lines. Very vague.
ih8mud GPT was similar to
100 Series GPT, slightly more detailed. Just as incorrect.
Final attempt with the
ih8mud GPT and getting much more detailed
I was asking about the spindle needle bearing that is on the back of the steering knuckle, behind the brass bushing.
- Remove the brake caliper, rotor, and hub to gain access to the steering knuckle and spindle.
- Remove the axle shaft by disconnecting any related components like the tie rod end and upper/lower ball joints to free up the knuckle.
- The needle bearing is behind the brass bushing on the inside of the steering knuckle.
We are getting somewhere, but this is very vague.
can you be more precise in how do I remove the knuckle?
- Remove the brake caliper
- Slide the brake rotor off the hub. If it’s stuck due to rust, gently tap around the rotor with a mallet.
- this is not how it works at all! Removing the front rotor is way more work.
- Pry off the hub cap.
- Using a large socket (usually 35mm or 36mm), remove the axle nut securing the CV axle to the hub. A breaker bar may be necessary due to the high torque.
Further down it is the same mix of somewhat right and mostly wrong.
Tried some other random stuff, such as looking for the BD1 cable connector - told me it is in the engine bay.
Make of this what you will.
