MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-544
STEP 5. Check the ignition system.
(1) Connect the tachometer to engine speed detection
connector A-12X terminal 1.
(2) Crank the engine.
•
A tachometer moves.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does a tachometer move?
YES :
Go to Step 6.
NO :
Refer to INSPECTION PROCEDURE 33
−
Ignition
Circuit System
STEP 6. Check the ignition timing.
(1) Check the ignition timing at cranking.
Standard value: 5
°
BTDC
±
3
°
Q: Is the ignition timing normal?
YES :
Go to Step 7.
NO :
Check that the crankshaft position sensor and timing
belt cover are in the correct position. Then confirm
that the malfunction symptom is eliminated.
STEP 7. Check the left bank injector.
(1) Disconnect the left bank injector connector B-02, B-06, B-
25.
(2) Measure the resistance between each injector side
connector terminal 1 and 2.
Standard value: 13
−
16 ohm [at 20
°
C (68
°
F)]
Q: Is the resistance standard value?
YES :
Go to Step 8.
NO :
Replace the faulty injector. Then confirm that the
malfunction symptom is eliminated.
AC101151
AC101133
AC
ENGINE SPEED
DETECTION
CONNECTOR
CONNECTOR: A-12X
AK000213AB
CONNECTORS : B-02, B-06, B-25
B-02 B-06 B-25
AK000559
2
1
INJECTOR SIDE
CONNECTOR
AB