8. Fuel injector (see Table 1-10)
Table 1-10
Diagnostic Trouble Code (DTC) Trouble Location or Type
P0261 Cyinder 1 fuel injector circuit low
P0264 Cyinder 2 fuel injector circuit low
P0267 Cyinder 3 fuel injector circuit low
P0270 Cyinder 4 fuel injector circuit low
P0262 Cyinder 1 fuel injector circuit high
P0265 Cyinder 2 fuel injector circuit high
P0268 Cyinder 3 fuel injector circuit high
P0271 Cyinder 4 fuel injector circuit high
S/N Operation Test Results Actions
1
Ignition switch in position ON, do not start the
engine.
Next step
2
Disconnect the electromagnetic fuel injector from
the harness. Connect the two pins of the multimeter
with the pin (1) (+) and the engine respectively.
Next step
Yes Repeat 2
Yes (all) As per S/N 6
3
Ignition switch in position ON. Check if the volatage
of 12V can be read in the multimeter for about 1
second.
No Next step
Yes Repair or replace harness
4
Check for open or short circuit between pin J1-02 of
the main relay and pin (1) of solenoid fuel injector
with a multimete
No Next step
5
Repair or replace the fuel pump relay/main relay
and relevant circuit.
Yes Repair or replace harness
6
Connect an adapter between the ECU and the
harness. Check for open or short circuit between
pin J1-55, pin J1-70, J1-56, J1-71 of the ECU and
pin (2) of the solenoid fuel injector with a
multimeter.
No Next step
Yes Repeat 7
Yes (all) Next step
7
Measure the resistance between pin (1) and pin (2)
of the solenoid fuel injector with a multimeter. Is the
resistance between 12Ω and 16Ω under the
temperature of 20
0
C?
No
Replace electro-magnetic
fuel injector
Yes Repeat 8
8
Connect the solenoid fuel injector, keep neutral
position, start the engine and keep idle speed.
Disconnect the electromagnetic fuel injector in
sequence. Check the engine for vibration when
each connector is removed.
No Replace ECU
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