Justy Hatchback 2WD L3-1.2L SOHC (MPFI) (1992)
FUEL INJECTOR CONTROL SYSTEM DIAGNOSTIC CHART
CHECK FUEL INJECTOR OPERATION
Using a stethoscope, confirm that all injectors "CLICK" while cranking the engine.
Fuel Injector Connector
CHECK VOLTAGE AT INJECTORS
1.
Disconnect connector F109 (injector sub-harness).
2.
Turn the key "ON".
3.
Using a voltmeter, check voltage between male connector terminal and ground.
Connector & terminal:
Voltage:
(F109)1-Ground
Above 9V
CHECK FUEL INJECTORS
1.
Turn the key "OFF".
2.
Using an ohmmeter, check the resistance between fuel injector terminals.
Connector & terminal:
Resistance:
(F109)1-2
10 - 18 Ohm
(F109)1-3
10 - 18 Ohm
(F109)1-4
10 - 18 Ohm
If not within specification, proceed to CHECK ENGINE HARNESS 2 below.
ECU Connector
CHECK VOLTAGE BETWEEN ECU AND FUEL INJECTORS
1.
Connect connector F109.
2.
Turn ignition key "ON".
3.
Using a voltmeter, measure voltage between ECU connector terminal and body. (Back probe ECU connector.)
Connector & terminal:
Voltage:
(F119)12-Ground
Above 8V
(F119)25-Ground
Above 8V
(F119)11-Ground
Above 8V
4.
Turn key "OFF".