Esp Troubleshooting - Honda TRX500FM Service Manual

ELECTRIC SHIFT PROGRAM (ESP: FE/FPE models)
BEFORE TROUBLESHOOTING
NOTE:
If the ATV has any ESP trouble, the gear position indicator brinks to indicate Ihe DTC (Diagnostic Trouble Code) (page 23-10).
Check the DTC and refer to the OTG index and begin the appropriate troubleshooting procedure (page 23-13),
If there are no DTG stored in the PCM memory, do the troubleshooting as "Symptom Troubleshooting" (page 23-5).
VERIFY THE COMPLAINT
Check the accuracy of the customer complaint by lest riding the A TV.
Note the symptoms.
Do not begin disassembly or testing untll you have determined if the problem is electrical or mechanical by shifting the gear
manually (page 23-6).
Temporarily failures can occur. Under certain conditions, the ESP system can "miss a shift." When this happens, the PCM may
record a DTC. Be sure to note and erase any stored OTC(s) when verifying the customer's complaint. If the customer's
complaint is duplicated during the test-ride , and the blinking gear position indicator displays a OTC. proceed with
troubleshooting.
PRELIMINARY ESP SYSTEM INSPECTION
Inspect the following before diagnosing the system .
- Make sure the battery is fully charged and in good condition (page 21-8)
- Make sure the clutch is adjusted properly (page 3-24)
- Check the main fuse 1 (30A), main fuse 2 (30A) and IGN fuse (10A) for blown
SYMPTOM TROUBLESHOOTING
Sympto m
Shift control failure but no
OlC set
Diag nosis
Toroubleshoot the "Electric
Shift Does Not Operate"
(page 23-6)
Gear position indicator blinks Inspect the serial
line (page 22-7)
Gear position indicator is no Inspect the OLC circuit
indication and MIL stays on . (page 4-29)
but no OIC is set
Also check for
clutch adjustment (page 3-24 )
Short circuit in the OlC rela ted wire
23-5