3P/3H Troubleshooting


We want you to have the best #lifeonair, so ALP put together a few questions and scenarios that you may have with their latest 3H and 3P air management systems. And if you can’t find the answer here, ALP has a dedicated customer service team in-house to help you every step of the way: Customer Service


 I’m using height mode but, when I’m obtaining a preset, the corner pressure values don’t always return to the same value.

This is common, as bag pressure is dependent on both the internal and external temperatures. Height mode is more accurate and, although the preset pressures may be different, you can rest assured that the preset is still obtaining the correct height for your vehicle.

 When obtaining a preset, one or more corners do not seem to target the correct height or pressure value.

This is happening because 3H has a unique featured called “Anti-Cross Load.” By default, this is turned on and will prevent a height setting that result in severe axle cross-loading.

 I occasionally receive a height/pressure sensor limit fault.

3H/3P include height sensor fault detection, a safety feature that will alert the user if a height sensor is going out of useable range. A limit fault indicates that the sensor needs to be adjusted back into range, or that the sensor has moved from its original mounting location. The electronic sensor tool that is built into the display can be used to adjust the sensor(s) if you are getting this message. Follow these simple steps to verify the range with the electronic sensor tool:

  1. 1.      Start with the vehicle at its lowest height. The sensor tool should display “Range Low” below each corner.
  2. 2.      Manually air up the front corners of the vehicle to their maximum height. Both front corners should then display “OK.”
  3. 3.      Manually air up the rear corners to their maximum height. Both rear corners should then display “OK.”

It may be necessary to repeat these steps by raising the rear first, to see if results vary. For any corners that do not display “OK,” the sensors will need to be adjusted in order to be within the acceptable limits, or increase the overall range (stroke).

 Can I run two compressors off the main harness and relay?

You can only run 1 compressor with the main harness and relay that come with the system. However, you can easily add a second compressor with the 3H/3P second compressor harness (P/N 27703).

 I am unable to download the Air Lift Performance 3 app on my Android. Every time I try to download it, I receive the message “App is not compatible with this device.”

The Android app is compatible with nearly 3,000 devices, but some devices are not supported based on mobile device limitations. Most likely, your mobile device does not have Bluetooth 4.0 or Bluetooth Low Energy support.

 My Air Lift Performance 3 app is experiencing connectivity issues.

Some mobile devices are unable to successfully handle multiple Bluetooth connections. Being paired to multiple devices (e.g. the Head Unit app) may cause connectivity issues with the 3H/3P manifold. Disconnecting from these extra devices will resolve the issue.

 All of a sudden, I cannot discover the manifold on my iOS or Android app.

The manifold can occasionally stop broadcasting the Bluetooth address. To resolve this issue, you can disconnect the manifold connector and then reconnect it, or reboot (power cycle) the manifold. With the ignition off, pull the main fuse, and then reinsert it.
If you have an Android device and are having trouble connecting to the manifold, it has been confirmed that the FitBit app will limit Bluetooth communication between the mobile device and 3H/3P manifold. Uninstalling the FitBit App will resolve the issue. Visit the FitBit site for more details.

 My display seems to randomly shut off and reboot itself.

The display is powered by the manifold, so if the battery or ignition input is lost, the display will turn off. A loose battery or ignition connection that does not maintain a constant connection will reboot the display.

 My display shuts off and keeps rebooting, never making it to the main screen.

This happens when there is insufficient 5V supply to the display. Most commonly, this issue arises when using a USB extension cable longer than 8 feet. Use a shorter USB extension cable or find a cable that is USB 3.0 rated (which uses larger wires gauge).

 I have heard there is a way to update the software of the manifold and display. How can I do that?

The software can be updated over-the-air using the iOS or Android apps, which are available free on the Apple App Store or on Google Play. Simply open the app, go into the “Settings” menu, click “About,” then “Check for Firmware Update.”

 After updating the software, the display says “ECU Not Found”. Is my manifold dead?

If “ECU Not Found” is displayed, then the manifold update has failed. In the event that a software update fails in the middle of this process, the manifold and display may appear dead. However, they can easily be recovered by attempting the software update process again. Even in this seemingly “dead” state, the manifold will allow the app to connect and the software update process can be performed again.

 After updating the software, the display is blank. Is my display dead?

If the display does not appear to power on after an update, then the display update failed. In the event that a software update fails in the middle of the process, the manifold and display may appear dead. However, they can easily be recovered by trying the software update process again. Connect to the manifold using the App and perform the software update process again.