Engine Electrical System

Diagnostic trouble code: P0204 “Circuit malfunction of the 4 cylinder fuel
injector”
Item
No.
Operation procedure
Inspection
results
Follow-up
procedure
1
Connect the diagnostic tester and adaptor,
and turn the ignition switch to “ON”
position.
Proceed to next
step.
Yes Proceed to Step 4
2
Disconnect the connector of the 4
cylinder fuel injector on the wiring
harness, and inspect with multimeter to
verify that the voltage between 1# pin of
this connector and the negative grid of
power supply is about 12V.
No
Proceed to next
step.
Yes
Repair or replace
the wiring harness.
3
Verify that the circuit between 1# pin of
the connector of the 4 cylinder fuel
injector and the main relay is open or
short to ground.
No
Proceed to next
step.
Yes
Proceed to next
step.
4
Inspect with multimeter to verify that the
resistance between 1# and 2# pins of the
4 cylinder fuel injector is within 11~16Ω
under 20.℃
No
Replace the fuel
injector.
Yes
Refer to diagnosis
help.
5
Inspect with multimeter to verify that the
voltage between the connector of the 4
cylinder fuel injector (2# pin) and the
negative grid of power supply is about
3.7V.
No
Proceed to next
step.
Yes
Repair or replace
the wiring harness.
6
Verify that the circuit between the
connector of the 4 cylinder fuel injector
(2# pin) and 47# pin of ECU is open or
short to ground or power supply.
No
Refer to diagnosis
help.
E-37
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