07-08-2022, 05:53 AM
Assuming you have an Allison MH 3000 transmission.
https://rvtechlibrary.com/transmissions/...rators.pdf
See starting page 60.
Per the Allison 3000_4000 Operators Manual:
Diagnostic Code Display Procedure
Pushbutton Shift Selector.
Bring vehicle to a stop at a safe location
Apply parking brake
To Display Stored Codes:
1. Simultaneously press the up and down arrow buttons once to access the Oil Level Display Mode - press the buttons a second time to access the Diagnostic Display Mode
2. Observe the digital display for codes.
- Diagnostic codes will appear one digit at a time on WTEC III pushbutton or lever shift selectors.
- Diagnostic codes will appear two characters at a time on Allison 4th Generation Controls pushbutton or lever shift selectors.
3. Press the MODE button to see the next code - repeat for subsequent codes.
Pages 65-72 lists Codes
https://rvtechlibrary.com/transmissions/...rators.pdf
See starting page 60.
Per the Allison 3000_4000 Operators Manual:
Diagnostic Code Display Procedure
Pushbutton Shift Selector.
Bring vehicle to a stop at a safe location
Apply parking brake
To Display Stored Codes:
1. Simultaneously press the up and down arrow buttons once to access the Oil Level Display Mode - press the buttons a second time to access the Diagnostic Display Mode
2. Observe the digital display for codes.
- Diagnostic codes will appear one digit at a time on WTEC III pushbutton or lever shift selectors.
- Diagnostic codes will appear two characters at a time on Allison 4th Generation Controls pushbutton or lever shift selectors.
3. Press the MODE button to see the next code - repeat for subsequent codes.
Pages 65-72 lists Codes