Merckhou wrote: ↑

Thu Aug 11, 2022 5:55 pm

Hello all,

I’ve looked all around the Internet for Active suspension fluid Type. I have a 1991 Nissan president (Q 45). I’ve checked every forum and emailed the user Texas oil because of a 15 year old post.

If the fluid isn’t available, does anybody know any alternatives?

3Q Jay wrote: ↑

Fri Aug 12, 2022 11:05 am

Of course!
CHF-11s is readily available. And it's even green, just doesn't have the fluorescent dye properties. I have started 'cutting it in' on my actives.
There are some Mercedes guys that use it in their "active" systems (which incidentally have the same type of tandem power steering/active pump arrangement.

3Q Jay wrote: ↑

Fri Aug 12, 2022 4:39 pm

is your fluid level on the dipstick when engine running, warm?
if so, then adding more fluid is probably not going to turn the light off.
Next would be to run the self check. Key on, engine off. Flip the switch N-->H-->N-->H etc at least 10 times in less than 10 seconds leave switch in N position when done. Wait. you will see the act sus light flash a code. count the number of long blinks followed by the number of short blinks (pattern should repeat).
report back.

Infinitiguy19 wrote: ↑

Sat Aug 13, 2022 9:40 am

In the center console there is a height switch that says “N” and “H”. Turn the ignition on but engine off and with in ten seconds of doing that turn the height switch to Normal and High ten times. On the gauge cluster the active suspension light should flash. Count the number of flashes and see what they mean in the service manual.

Or buy a ECU Talk cable and use a laptop to find the code.

My guess is that that the system has air in it and the pump is sucking in air instead of fluid. So it would come up as a pressure code.

Does the car raise up when turning it on?

Does the light come on right away after turning the car on?