Komatsu HM-300-2 Articulated Truck with codes

Hello, Have a Komatsu articulated dump truck. Have a code coming up A003. WOuld anyone know what this is for? Thank you!

KCORNISH, Most of the Komatsu fault codes are 6 digits in length. There are general action codes, E01,E02,E03 that are three digits in length but general action codes just give operator directions as to the severity of fault and whether or not the operator needs to shut the machine down or not. On the dash2 HM300's you have to toggle the > switch to see actual fault code which is different from the general action code.

coalrulz said: KCORNISH, Most of the Komatsu fault codes are 6 digits in length. There are general action codes, E01,E02,E03 that are three digits in length but general action codes just give operator directions as to the severity of fault and whether or not the operator needs to shut the machine down or not. On the dash2 HM300's you have to toggle the > switch to see actual fault code which is different from the general action code. Click to expand... Good evening I have an E03 code on a wiggle wagon komatsu I'm trying to figure out what the issue is you refer to severity is E03 more or less severe? Do you have any ideas what cpuld trigger it I've done everything that's obvious fluid levels Fuses filters I'm not getting specifics anywhere

Was wondering what would cause my power windows and emergency brake not to work on my komatsu HM300-2. I’ve change the fuses and have fire coming out of the window switches.

The window motors shorts out from dirt and water. The trucks have parking brakes and service brakes. It also might have a retarder. I think you will probably need a service manual to troubleshoot that stuff.

Anyone know at plug in here? Just bought the machine this way.

Right by your hand looks to me to be some green corrosion , next to a brown and black relay. Have you pulled every fuse and relay in case there is corrosion hiding under. Of course if the picture looks like corossion but is not then disregard my comment, but could be something to look at anyways. Is there a spot just below your hand that it plugs into, or another harness above or below that is not on the picture. Could it be for some kind of option, a schematic would show where it goes if a guy opened up the black tape for 4 inches to reveal all the wire colours and numbers. Simon C

Thank u I’ll look into to green stuff u noticed. Was was wondering if anyone knws what goes to that pug to. I just bought the machine and notice that. Didn’t knw if it has anythn to do with the electric windows not workn or the electric park break not workn.

Tim1671 said: Thank u I’ll look into to green stuff u noticed. Was was wondering if anyone knws what goes to that pug to. I just bought the machine and notice that. Didn’t knw if it has anythn to do with the electric windows not workn or the electric park break not workn. Click to expand... There would have to be another electric plug in or receiver close by is all I can think of. Schematic would show it if you could see numbers on wires. Simon C

Where would I find the schematic? I bought a parts manual for the machine but it’s not any help.

Maybe reach out to @ Lachau as he has been able to help some. Or the Komatsu Dealer closest to you is my suggestion. Simon C