need help with T550 that has error code d7501

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fdixon85

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Apr 14, 2022
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1
i'm working on a bobcat t550 and i'm getting a D7501 code. this is a communications error code and it is linked to the can bus so i started with the basics checking the wiring and i cant find any bad wiring. i then swapped out the left joystick with another t550 that is working fine because i got the H3928 code and that is a internal can failure. and it still wont fix the issue. the unit will move 10 feet and then stop like if you lifted the safety bar then you can press the operate green button and move again and it locks out again. i also swapped out the switch on the safety bar as well and that did nothing.
so here i am reaching out for some help has any one else had this problem?????
 

Azza_sako17

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Joined
Apr 24, 2024
Messages
1
i'm working on a bobcat t550 and i'm getting a D7501 code. this is a communications error code and it is linked to the can bus so i started with the basics checking the wiring and i cant find any bad wiring. i then swapped out the left joystick with another t550 that is working fine because i got the H3928 code and that is a internal can failure. and it still wont fix the issue. the unit will move 10 feet and then stop like if you lifted the safety bar then you can press the operate green button and move again and it locks out again. i also swapped out the switch on the safety bar as well and that did nothing.
so here i am reaching out for some help has any one else had this problem?????
I am getting the same codes on my S205, mine will drive forward and back but as soon as I push the left joystick to turn either right or left it locks up and the error codes pop up, I can the operate button and it will unlock and drive forward and back again.

Did you have any luck finding out the problem ?
 

Equipment_Tech

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Joined
Jun 16, 2023
Messages
98
i'm working on a bobcat t550 and i'm getting a D7501 code. this is a communications error code and it is linked to the can bus so i started with the basics checking the wiring and i cant find any bad wiring. i then swapped out the left joystick with another t550 that is working fine because i got the H3928 code and that is a internal can failure. and it still wont fix the issue. the unit will move 10 feet and then stop like if you lifted the safety bar then you can press the operate green button and move again and it locks out again. i also swapped out the switch on the safety bar as well and that did nothing.
so here i am reaching out for some help has any one else had this problem?????
I would take a quick look at your traction lock solenoid inspect it closely

I have had shorts in the harness going to the module before too but that is where I would start
 

Equipment_Tech

Well-known member
Joined
Jun 16, 2023
Messages
98
BICS. Bobcat Interlock Control System

1. Door switch (has different code)
2. Lap bar (has different code)
3. Seat switch (has different code) (models may vary)
4. Traction lock solenoid (has different code) But can short module out and confuse the system

These are the 4 components that active the safety release (interlock system)
 
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