Yamaha XT660 2004, Service Manual

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ELEC
IMMOBILIZER SYSTEM
EAS00781
TROUBLESHOOTING
Check:
1. main, ignition, and backup fuses
2. battery
3. main switch
4. wiring
(of the entire immobilizer system)
NOTE:
• Before troubleshooting, remove the following
part(s).
1. seat
2. battery cover
3. side panels (left and right)
4. fuel tank side covers (left and right)
5. fuel tank
• Troubleshoot with the following special
tool(s).
EAS00738
YES NO
EAS00739
YES NO
EAS00749
YES
NO
EAS00787
YES
NO
The immobilizer system fails to operate.
(The immobilizer system indicator light
starts to flash in the self-diagnosis code
sequence.)
Pocket tester
90890-03112
1. Main, ignition, and backup fuses
• Check the main, ignition, and backup
fuses for continuity.
Refer to “CHECKING THE FUSES” in
chapter 3.
• Are the main, ignition, and backup fuses
OK?
Replace the fuse(s).
2. Battery
• Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20 °C
• Is the battery OK?
• Clean the battery
terminals.
• Recharge or
replace the battery.
3. Main switch
• Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
• Is the main switch OK?
Replace the main
switch/immobilizer
unit.
4. Wiring
• Check the entire immobilizer system’s wir-
ing.
Refer to “CIRCUIT DIAGRAM”.
• Is the immobilizer system’s wiring properly
connected and without defects?
Check the condition
of each of the immo-
bilizer system’s cir-
cuits.
Refer to “CHECK-
ING THE IMMOBI-
LIZER SYSTEM”. Properly connect or
repair the immobilizer
system’s wiring.