MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-325
STEP 10. Measure the power supply voltage at injector
relay harness side connector A-25X.
(1) Disconnect the connector A-25X and measure at the
harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 4 and ground.
• Voltage should be battery positive voltage.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 12.
NO : Go to Step 11.
STEP 11. Check harness connector A-34X at MFI relay for
damage.
Q: Is the harness connector in good condition?
YES : Repair harness wire between MFI relay connector
A-34X (terminal No. 2) and injector relay
connector A-25X (terminal No. 4) because of open
circuit or short circuit to ground. Then go to Step
20.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
P.00E-2
. Then go to Step 20.
STEP 12. Check for open circuit or short circuit to ground
between injector relay connector A-25X (terminal No. 3)
and No. 3 cylinder injector connector B-103 (terminal No.
1).
NOTE: Check harness after checking intermediate connector
A-39. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection
P.00E-2
.
Then go to Step 20 .
Q: Is the harness wire in good condition?
YES : Go to Step 13.
NO : Repair it. Then go to Step 20.
2
1
3
4
AK604035 AD
A-25X harness
connector:
component side