Bobcat 763 - Battery Voltage High

[javelina80]

Hi I am new to this forum, but can't seem to find what I am looking for when doing a search or contacting any dealers. A few weeks ago my 763 started to lock up and 3 of the 4 BICS lights would constantly flash. The battery light would stay on. Error Code 03-10. I have a service manual for my unit so I checked the voltage out of my 55amp alternator, and found it to be out of range high... 14.7 volts at idle. (manual says, "The voltage must be higher than 13.5 volts but lower than 14.7 volts at 70 degrees F"). I replaced the alternator and battery per recommendation of a dealer. The unit operated fine for a couple of days, sat for a little over a week, and now is doing the same thing, but only putting out 14.5 volts. 14.5 volts according to the manual is within spec. On occasion I will get an 03-11 code (voltage extremely high), and the battery light will flash. Voltage again is within spec, but I am at a loss for what to do. I have checked grounding connections, and cleaned them, cleaned positive connections. The dealers only help is bring it in. Out side of this I need some help. Anyone have any ideas?

 

[javelina80]

EDIT: I just checked the continuity between the "S" Terminal and the "+" terminal on the battery. There is continuity.

 

[Bobcatdan]

EDIT: I just checked the continuity between the "S" Terminal and the "+" terminal on the battery. There is continuity.

BICS operates between 9 and 16 volts so 14.5 should bother anything, that is a perfectly fine output. I'm kinda wondering if the BICS mod is the problem.

 

[7LBSSMALLIE]

BICS operates between 9 and 16 volts so 14.5 should bother anything, that is a perfectly fine output. I'm kinda wondering if the BICS mod is the problem.

you did not state is this a boss unit led right hand upright?

 

[Bobcatdan]

you did not state is this a boss unit led right hand upright?

I reread the post, with a code 3-11, it is a G series. I would start by swapping the controller.

 

[javelina80]

I reread the post, with a code 3-11, it is a G series. I would start by swapping the controller.

Swapping out BICS Controller? Any idea how to test this? Where it's located? Cost of part?

 

[javelina80]

Swapping out BICS Controller? Any idea how to test this? Where it's located? Cost of part?

Update: I inspected the BICS Contoller per the service manual. All functions are working as they should. I am not saying it isn't the controller, just saying by service manual it checks out. I also checked the continuity of the BICS Solenoid and found it to have continuity with 011 ohms.

 

[javelina80]

Update: I inspected the BICS Contoller per the service manual. All functions are working as they should. I am not saying it isn't the controller, just saying by service manual it checks out. I also checked the continuity of the BICS Solenoid and found it to have continuity with 011 ohms.

Edit: I Inspected the BICS Sytem per the manual. I am looking for the BICS Controller location?

 

[7LBSSMALLIE]

Edit: I Inspected the BICS Sytem per the manual. I am looking for the BICS Controller location?

you stated its a g no bics which woul be located by right elbow. on an f. alt needs checked with a vat40 or equivlent sounds like volatge reg bad (full fielding intermittenatly) causing controller to sense over amp > cheapest and quickest is pull alt send to local elect repair shop.(one in every town) not the 19 yr old at auto zone) and get it confirmed good or bad, and move on from there probally 35 bucks

 

[javelina80]

you stated its a g no bics which woul be located by right elbow. on an f. alt needs checked with a vat40 or equivlent sounds like volatge reg bad (full fielding intermittenatly) causing controller to sense over amp > cheapest and quickest is pull alt send to local elect repair shop.(one in every town) not the 19 yr old at auto zone) and get it confirmed good or bad, and move on from there probally 35 bucks

This is a model year 2002. It is equipped with BICS. I am looking for the location of the BICS Controller. Brand new alternator as stated in the original post. It is not a reman.

 

[Bobcatdan]

This is a model year 2002. It is equipped with BICS. I am looking for the location of the BICS Controller. Brand new alternator as stated in the original post. It is not a reman.

BICS is built into the machine controller. On a 763, the controller is under the cab left side, black with 2 or 4 connectors. Have actually verified high voltage with a meter?

 

[javelina80]

BICS is built into the machine controller. On a 763, the controller is under the cab left side, black with 2 or 4 connectors. Have actually verified high voltage with a meter?

No at idle I only get 14.5 volts. New alt. new bat. Checked continuity on s terminal. Checked all the connections except for the one's on the ECU. I wondered if the computer under the cab was the BICS controller. Are they expensive?

 

[javelina80]

No at idle I only get 14.5 volts. New alt. new bat. Checked continuity on s terminal. Checked all the connections except for the one's on the ECU. I wondered if the computer under the cab was the BICS controller. Are they expensive?

I called my closest dealer today... 65 miles away. Talked to them again about my issue and the things I have done to diagnose the problem. We determined that the new battery had too low of CCA (665, and needing at least 1000). I replaced the battery tightened a power cable at the junction box going from the battery, and rechecked all grounds for cleanliness and tightness. As of yet this seems to have fixed my issue... (knock on wood.) A new Control Unit was around $800, but was told it isn't uncommon for them to fail. Thanks for the help, and glad my dealer finally gave me the time of day.