Good evening friendly AHC wizards,
I think it's time for a new AHC pump (motor) but I'm still finding my way around the system and wanted some confirmation before pulling the trigger. Here's the situation:
Background-My wife and I replaced all 4 AHC "shocks" with new OEM ones (and some other things, post to come once we are back to normal). Before this our AHC was completely functional with about 8 gradations of movement between high and low and good pressures (can provide specifics if helpful). I flushed the system about 8 months ago with no complications or concerns at the time or since.
Problem-now that we have everything hooked back up the truck is stuck in "neutral" even though its actually riding close to if not below what normally measures as low height. It won't cycle up or down.
When doing the short in the diagnostic port the motor runs and makes an *awful* screeching/grinding noise. It runs continuously, but it's only able to lift the vehicle up to something approximating neutral (the interior display always reads neutral) before it loses pressure and falls back down again.
Codes:
-C1761 AHC ECU Malfunction (this might be old. The off light has been blinking since we got it but not once has it affected functionality).
-C1762 Abnormal Oil Pressure for Pump
Data- front and rear pressures are reading 0.0, accumulator reading 0.3. This actually was the case before in neutral position sometimes, so I don't know how trustworthy these numbers are, but the pressure is definitely low (see next section).
Remedies attempted:
1) draining all 5 points- pressures were much lower than previously, even after running motor. No noticeable vehicle drop on draining.
2) manual operation of motor via short method- hoped maybe there was air trapped and this/bleeding the accumulator would fix/improve things. No such luck.
Thank you very much for all help in advance!
I think it's time for a new AHC pump (motor) but I'm still finding my way around the system and wanted some confirmation before pulling the trigger. Here's the situation:
Background-My wife and I replaced all 4 AHC "shocks" with new OEM ones (and some other things, post to come once we are back to normal). Before this our AHC was completely functional with about 8 gradations of movement between high and low and good pressures (can provide specifics if helpful). I flushed the system about 8 months ago with no complications or concerns at the time or since.
Problem-now that we have everything hooked back up the truck is stuck in "neutral" even though its actually riding close to if not below what normally measures as low height. It won't cycle up or down.
When doing the short in the diagnostic port the motor runs and makes an *awful* screeching/grinding noise. It runs continuously, but it's only able to lift the vehicle up to something approximating neutral (the interior display always reads neutral) before it loses pressure and falls back down again.
Codes:
-C1761 AHC ECU Malfunction (this might be old. The off light has been blinking since we got it but not once has it affected functionality).
-C1762 Abnormal Oil Pressure for Pump
Data- front and rear pressures are reading 0.0, accumulator reading 0.3. This actually was the case before in neutral position sometimes, so I don't know how trustworthy these numbers are, but the pressure is definitely low (see next section).
Remedies attempted:
1) draining all 5 points- pressures were much lower than previously, even after running motor. No noticeable vehicle drop on draining.
2) manual operation of motor via short method- hoped maybe there was air trapped and this/bleeding the accumulator would fix/improve things. No such luck.
Thank you very much for all help in advance!
