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4-80 FI SYSTEM DIAGNOSIS
“C36” (P1764), “C37” (P1765), “C38” (P1766) or “C39” (P1767)
SECONDARY FUEL INJECTOR CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. (5-3)
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: 11 – 13 Ω at 20 °C (68 °F)
(Terminal – Terminal)
DETECTED CONDITION POSSIBLE CAUSE
Some failure exists in the fuel injector signal in a
high load, high revolution condition.
• Injector circuit open or short
• Injector malfunction
• ECM malfunction
ECM
Fuel pump relay
Secondary fuel injector
Y/R
Lg
Lg/W
Lg/G
Lg/BI
#22
#32
#42
#12
To engine
stop switch
#2#3#4 #1
1
1