AHC code error

[antek]

Hi,
I'm new on this forum.
I have problem with my UZJ 100 2003 AHC suspension. It is stiff and generaly doesn't work.
i connected the terminal Ts to CG of DLC3 and read code: c1718, c1736, c1764.
First of all i replaced fluid preasure sensor but it still not working.
I'd like to avoid replacing every part of the AHC
Does anybody have any idea what to do ?

 

[PADDO]

Hi,
I'm new on this forum.
I have problem with my UZJ 100 2003 AHC suspension. It is stiff and generaly doesn't work.
i connected the terminal Ts to CG of DLC3 and read code: c1718, c1736, c1764.
First of all i replaced fluid preasure sensor but it still not working.
I'd like to avoid replacing every part of the AHC
Does anybody have any idea what to do ?

1718 and 1736 point back to the ECU so I'd check/reseat the connectors at the ECU first off. Then clear codes and see what pops up. Probably wouldn't hurt to also pull the AHC b fuse to depower the ECU as that might help unlock if it has locked itself up.

 

[antek]

I have checked everything and it still doesnt work.

 

[PADDO]

You're probably going to need to share a bit more info on what you have and haven't done. Is the OFF light flashing? can you get it to raise/lower? When you replaced the pressure sensor did you drive the pump manually (in diagnostic mode) to force it to pressurize? If you have an airlock in the pump it won't pressurize and is a no go 'till you bypass it. Else it could be your AHC ecu. The more info on what works/doesn't work helps to eliminate stuff.

 

[antek]

generally suspension doesn't work. The OFF is flashing , it's imposible to raise or lower and it is very stiff. But sometimes everything is OK and work properly for a few days. Then suddenly I can hear a "clic" of relay beside ECU, the off is flashing and it doesn't work.
I will try to replace ECU.