LMU-3030 without LEDs	LMU-3030 with LEDs
LMU-3040

If your LMU-3030 or LMU-3040 seems to be failing, before contacting CalAmp about returning it, first try the following troubleshooting steps to make sure that something else other than the hardware isn't causing the problem:

1. Make sure that the vehicle has a clear view of the sky.
    
2. Check that the vehicle ignition key is in the ON position and that the engine is running.
    
3. Check the status LEDs (if your device has LEDs – if not, skip to step 4):
    
   

   LMU-3030's LEDs	LMU-3040's LED display

LMU-3030

• Ensure that the COMM LED is solid orange. This is what the LED states indicate:
   

  Condition	COMM LED (Orange)
  Modem off	Off
  COMM on - searching	Slow blinking
  Network available	Fast blinking
  Registered but no inbound acknowledgment	Alternates from solid to fast blink every 1 second
  Registered and received inbound acknowledgment	Solid

  
   
• Ensure that the GPS LED is solid green. Here is a description of its LED behavior:
   

  Condition	GPS LED (Green)
  GPS off	Off
  GPS on	Slow blinking
  GPS time sync	Fast blinking
  GPS fix	Solid

  
   
• Ensure that the ignition LED is solid red. These are the ignition LED conditions:
   

  Condition	Ignition LED (Red)
  Ignition off	Off
  Ignition on	On

LMU-3040

Note: There is only one LED display window on the LMU-3040, which will show different colors. The LMU-3040LA will initially boot with a solid amber light before starting its normal blinking pattern.

• Ensure that the COMM LED holds solid amber for four seconds. This is what the amber LED states indicate:
   

  Condition	COMM LED (Amber)
  Modem off	Off
  COMM on - searching	1 Hz blink (four seconds)
  Network available	4 Hz blink (eight times over two seconds)
  Registered but no inbound acknowledgment	Alternates from solid to fast blink every 1 second
  Registered and received inbound acknowledgment	Solid (four seconds)

  
   
• Ensure that the GPS LED holds solid green for four seconds. Here is a description of its LED behavior:
   

  Condition	GPS LED (Green)
  GPS off	Off
  GPS on	1 Hz blink (four seconds)
  GPS time sync	4 Hz blink (eight times over two seconds)
  GPS fix	Solid (four seconds)

4. Check that the LMU (location messaging unit) is solidly in the OBDII port.
    
5. Verify that the LMU is reporting to CalAmp K-12:
    
   • Open the CalAmp K-12 mobile app, which is available in Google Play or the App Store, on a mobile device. In the vehicle list, tap the vehicle name. (See Tracking a Vehicle for more details.) If the LMU is reporting live, a map will appear showing your vehicle's location. Below the map, check the number to the right of Sats (the GPS satellite count); make sure that it is 5 or higher.

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     Note: You'll need to log in to the app using a CalAmp K-12 login, not a punch ID.

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   • On a computer, use CalAmp K-12 (https://login.synovia.com) to check whether any events are being reported for the vehicle and that it appears in its current location on the map. (See Tracking a Vehicle for more details.)
      
6. If step 5 shows that the bus still isn't reporting data to CalAmp K-12, try swapping out the nonfunctioning LMU for a known working LMU, just to check for certain whether the device is the problem.

If you've tried all these troubleshooting steps and the device is still malfunctioning, you can open a ticket at CalAmp JIRA Service Desk. (You can find more details at Returning Hardware and Obtaining a Replacement [Performing an RMA].)