Calibration FAQ

1. Open the ECRI app
2. Tap Account (bottom right)
3. Enter your phone number (1 + 10-digit number)
4. Enter a password and tap Log In / Sign Up
5. Tap Create Account
6. ECRI will text you a 6-digit confirmation code
7. Enter the code — tap Continue when verified
8. Use your phone number & password to log in going forward

1. Plug the ECRI device into your OBD port
2. Open the ECRI app — Bluetooth will connect automatically
3. Tap Account (bottom right)
4. Tap Device Update
5. Tap Start Update
6. Wait for the download and install to complete (typically 7–10 minutes)

1. Open the ECRI app and tap Account
2. Enter your phone number and any password, then tap Login
3. Tap Reset Password
4. Enter the confirmation code sent to your phone
5. Set a new password (8+ characters, mixed letters and numbers)
6. Tap Reset Password — you should see a success confirmation

• Make sure Bluetooth is enabled on your phone or tablet
• Android users must grant Location permissions to the ECRI app
• A red "ECRI" light means the device is discoverable and ready to pair
• A green light means it's connected
• The device powers off after 30 seconds without a connection to conserve battery and enhance security — simply unplug and re-plug to wake it

The size printed on your tire sidewall is not accurate for calibration because tires compress under the weight of the vehicle — typically about 1 inch shorter than the printed size.

Recommended method: Locate the center of your wheel hub, measure to the ground, and multiply by 2. This gives you the true rolling diameter.

Quick shortcut: Subtract 1 inch from your sidewall size without measuring. For most lifted Jeeps this is accurate enough.

Have a passenger operate the app. Do not use your phone while driving.

1. Plug in the ECRI device and open the app — Bluetooth connects automatically
2. Tap GPS Speedo on the bottom menu
3. The app starts collecting data once the vehicle exceeds 40 mph
4. When the white arrows turn green, pull over and put the vehicle in park
5. Tap Program Vehicle and confirm

There are two common causes:

• Tire size entered is too large — try subtracting 1 inch from your sidewall measurement to account for tire compression from the vehicle's weight.
• Settings haven't taken full effect — for JL/JT models, the modules need a full power-down cycle. See Settings Not Taking Effect below.

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Tap Tire Size (first option)
4. Enter your tire size (subtract 1 inch from sidewall size — the tire squishes under vehicle weight)

Double-check your settings before confirming. Incorrect gear ratio settings can put your vehicle in limp mode and prevent it from shifting out of 2nd gear.

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Tap Axle Ratio (second option)
4. Verify your settings are correct, then continue past the warning
5. Enter your gear ratio and confirm
6. Turn the ignition off, remove the key, open the door, and let the modules power down

This code can appear if something interrupted the programming process — common causes include the key being in the wrong position, turning the key off too early, or the vehicle running its own internal updates during programming.

Fix:

1. Clear all DTC codes using the ECRI app or an OBD scanner
2. Cycle the ignition on and off several times
3. Re-program your tire size using the ECRI app

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Scroll down to DRL Region and tap it to set your region (country)
4. Tap DRL Location and set which lights to use (high beams, fogs, etc.)

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Tap the Fogs Off w/ Hi-Beams toggle
4. Tap Write Programming and confirm
5. Turn the ignition off, remove the key, open the door, and wait for modules to power down

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Tap the TPMS Enabled toggle to disable it
4. Tap Write Programming and confirm
5. Turn the ignition off, remove the key, open the door, and let the modules power down

1. Reach under the dash about a hand's length behind the OBD port to locate two connectors
2. Remove both plugs
3. Insert the plugs into the ECRI Security Bypass module
4. Plug the ECRI device into the OBD port
5. Open the ECRI app — you're ready to calibrate

JL/JT models use a security gateway module (SGW) that requires a full power-down cycle before applying new settings. A quick key-off is not enough.

Proper power-down procedure:

1. Turn the ignition off
2. Open the driver door and exit the vehicle with the key fob
3. Close the door
4. Wait a minimum of 5 minutes for all modules to fully power down and self-update

1. Plug the ECRI device into the OBD port and open the app
2. Tap Tire Size
3. Enter your tire size (subtract 1 inch from the sidewall size)
4. Set Speedometer Tolerance to 0%
5. Tap Write Programming and confirm
6. Perform the full power-down procedure (turn off, exit with key fob, close door, wait 5 minutes)

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Scroll down to LED Turn Signals
4. Tap the toggle to enable it
5. Tap Write Programming and confirm
6. Tap OK when finished

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Scroll down to DRL Region and set your region (country)
4. Tap DRL Location and choose which lights to use (high beams, fogs, etc.)
5. DRL voltage is updated automatically

Double-check your settings before confirming. Incorrect gear ratio settings can put your vehicle in limp mode and prevent it from shifting out of 2nd gear.

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Tap Axle Ratio
4. Verify your settings, then continue past the warning
5. Enter your gear ratio and confirm
6. Perform the full power-down procedure (turn off, exit with key fob, close door, wait 5 minutes)

1. Plug the ECRI device into the OBD port
2. Open the ECRI app
3. Tap History in the bottom menu
4. Scroll to the very bottom of the list (history is in chronological order — the original settings are at the bottom)
5. Tap Read from Vehicle (the green title above the bottom set of values)
6. Tap Yes, Restore
7. Wait 25–30 seconds for the restore to complete

1. Plug the ECRI device into the OBD port
2. Open the ECRI app — Bluetooth connects automatically
3. Tap DTC in the settings menu
4. ECRI will immediately run a dealer-level scan across all vehicle modules
5. When the scan finishes, tap any module to view and clear codes for that module