A yellow check engine light indicates a non-fatal failure of a component in your MARC cart. While the unit can be used with the light on, the failure should be resolved immediately. In some cases, restarting the MARC cart will clear yellow check engine lights. 

Note cart orientation used:

Yellow Check Engine light codes:

0000 - LEDs missing.
The cart will operate normally but will not communicate direction or other status via the LED indicator lights.

0010 - Battery pack not communicating.      
The battery pack is not communicating its status to the mainboard. The battery can still be checked using the physical button on the battery itself. Please see section titled Using MARC battery packs.

1025 - Distance sensor error (FL).              
Front left distance sensor malfunctioning.

1026 - Distance sensor error (FR).              
Front right distance sensor malfunctioning.

1027 - Distance sensor error (RL).              
Rear left distance sensor malfunctioning.

1028 - Distance sensor error (RR).             
Rear right distance sensor malfunctioning.

1090 - Access point error.              
Access point missing or malfunctioning. MARC will perform normal operations, but the software update procedure will not function.

1100 - Speaker error.       
The cart will operate normally but will not communicate status via the audio cues.

1110 - Weight sensor error.          
Weight sensor missing or malfunctioning.

If you have a red check engine light, it indicates a fatal problem with MARC - and you can not continue to use MARC. These errors need to be addressed before MARC can be used.

In certain cases, rebooting MARC can resolve a red check engine light and is always good to try.

Note cart orientation used:

Codes for red check engine lights:

0033 - Motor error (L)   
The left drive motor is not responding and is not operational.

0034 - Motor error (R)  
The right drive motor is not responding and is not operational.

0043 - Encoder error (L).              
The left wheel encoder is not responding or is not operational.

0044 - Encoder error (R).             
The right wheel encoder is not responding or is not operational.

0050 - IMU error.            
The inertial measurement unit is used to prevent MARC from tipping and is required for safe operation but is not responding.

0070 - Battery being charged.   
To prevent the cart from moving autonomously while the charging cord is attached, movement is disabled until the charger is removed.

1060 - Cart tilted.           
The cart experienced a tilt of greater than 10 degrees and must be reset.

1130 - Camera missing.
Front or rear high-definition depth camera is not responding.

1140 - Digital board error.          
The main communication board of MARC is not responding.

1150 - LIDAR missing.   
The laser measurement system has an error and is a critical part of MARC’s ability to ‘see’ the world and to the map-creation process.

1160 - Startup error.     
The software has an issue. Please reach out to support for more information and troubleshooting assistance.

If your MARC seems to be lost and cannot find its way, consider these steps.

• If MARC is in Fixed Map Mode (Save Map button is green), verify that it is in the mapped area. If the cart is in Fixed Map Mode and outside of its allowed area, you will hear the announcement "Outside mapped area".
• In Active Map Mode (Save Map button is gray), it may be necessary to power cycle the unit and reprogram the cart for use.
• It is possible that the map software can ‘shift’ the map if the cart wheels slipped or were moving when the cart was still. This can cause the maps to become disoriented. MARC is designed to be used on a flat, dry surface.
• It is also important not to move MARC units sideways or too quickly, as this may cause the wheels to slip. If the maps are shifted, the cart should be powered down and restarted.
• Please note that the destination points will need to be reprogrammed.

If you need to talk right away, give us a call at (262) 242-8830. We are available between 8:00a and 5:00p Monday-Friday Central time. Outside those hours, we suggest an email for a speedier response.

We can be reached at our general inbox at contact@multechnologies.com

To view our online documentation, follow this link: https://www.multechnologies.com/documentation