Service manual

CANDoo Professional
262
3.2.3.2.2 Fault Diagnosis
Yamaha Fault Diagnosis
The Fault page gives you details about faults logged by the ECU. The following steps can be used
to diagnose problems.
Step #1- Review the Fault data
As described in the Overview, an Active fault means the problem is present now, and an Occurred
fault means it has happened some time in the past.
Review the fault information by clicking the fault number in the listing on the left side of the page
Step #2 - Fix any Active Faults
Look in the table for any Active faults. The underlying problem causing these faults must be
fixed. Refer to the Diagnostic Procedures section of the Service Manual for the watercraft for
instructions related to troubleshooting problems related to the component(s) indicated by the fault.
Step #3- Analyze the Occurred Faults
Understanding Occurred Faults can be tricky. While transient problems (those that happen briefly
and then go away) will log an occurred fault, not all faults are stored by the system, so when you
shut off the watercraft, the fault is lost. Additionally, if faults have not been cleared for
quite awhile, you may not have a good indication if an occurred fault in the table is still a problem.
For example, you or a customer may notice a fault occur while running the watercraft. Let's say the
Exhaust Temperature Sensor has a bad connector that randomly disconnects. The watercraft may
signal a fault, but this particular fault is not stored. It will show Occurred while the watercraft is