Remove the air cleaner assembly.
Disconnect the output shaft (countershaft) speed sensor connector, and remove the output shaft (countershaft) speed sensor (A).

Install a new O-ring (B) on the new output shaft (countershaft) speed sensor, then install the output shaft (countershaft) speed sensor.
Check the connector for rust, dirt, or oil, then connect the connector securely.
Install the air cleaner assembly.
Emissions Testing
Testing of Readiness Codes
If you take your vehicle for an emissions test shortly after the battery has
been disconnected or gone dead, it may not pass the test.
This is because of certain ‘‘r ...
Gauge Control Module Replacement
NOTE: Before replacing the gauge control module,
retrieve the ODO value and the maintenance minder information from
the gauge control module with the HDS.
Remove the instrument panel.
...
Brake and Clutch Fluid
Check the brake fluid level in the reservoirs monthly.
Replace the brake fluid according to the time recommendation in the maintenance
minder schedule.
Always use Honda Heavy Duty Brake Fluid DOT ...