Mash Seventy - Fuel Injector

Chapter 4 EI system diagnosis Section 4 EI system troubleshooting
4—29
Is the voltage OK?
“P0261”or “P0262” FUEL INJECTOR CIRCUIT MALFUNCTION
DETECTED CONDITION POSSIBLE CAUSE
☞
To read the flash code,with the EFI diagnostic
instrument
● Injector circuit open orshort.
● Injectormalfunction.
● ECUmalfunction.
 INSPECTION
 Step 1
1) Remove the fuel tank.
2) Turn the ignition switch to the “OFF”position.
3) Check the injecto rcoupler①
for loose or poor contacts.
If OK, then measure the injector resistance.
※
FUELINJECTOR
4)
Disconnect the injector coupler ① and
measure the resistance between terminal B/G
and Pu.
Tester knob indication:Resistance(
Ω
)
5)
If OK, then check the continuity between
injector terminals and ground.
Tester knob indication:Resistance(
Ω
)
Are the resistance and continuity OK?
YES
Go to Step 2
NO
Replace the Injector with a new one.
YES
● O/B, Gr/Bl or G/Bl wire open or
shorted to ground, or poor
B16(J2-16) ,B12(J2-12) or
B10(J2-10) connection of ECU
coupler.
● If wire and connection are OK,
intermittent trouble or faulty
ECU.
● Recheck each terminal and wire
harness for open circuit andpoor
connection.
NO
If check result is not satisfactory,
replace the TP sensor with a new
one.
Injector resistance
11.4 ~ 12.6
Ω
at 20
℃
(68
℉
)
∞
Ω
(Infinity)
Injector continuity
B10
B12
B10
B16 B12
B16