FI SYSTEM DIAGNOSIS 12-40
“32” FUEL INJECTOR CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Stop the engine.
2) Remove the fuel tank. ("13-2)
3) Check the injector coupler for loose or poor contacts.
If OK, then measure the injector resistance.
4) Disconnect the injector coupler and measure the resistance
between terminals.
# Injector resistance: 9.5 – 11.5 Ω at 20 °C (68 °F)
(Terminal – Terminal)
DETECTED CONDITION POSSIBLE CAUSE
CKP signal is produced but fuel injector signal is
interrupted by 8 times or more continuously.
• Injector circuit open or short.
• Injector malfunction.
• ECM malfunction.
ECM
Fuel injector
R
Gr/W
#11
Regulator
/rectifier
Condenser
Magneto
CAUTION
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle pointed tester probe to prevent the terminal damage or terminal bend.
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