Positive Circuit

Fuel Injector Schematic:

Faulty fuel injectors will set codes 14, 15 and 16 in the on-board diagnostic system. The codes correspond to injectors #1, #2 and #3. Refer to the schematic diagram and test the injectors with the diagnostic chart.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Fuel Injector Diagnostic Chart:

FUEL INJECTOR DIAGNOSTIC CHART

Fuel Injector Testing:

CHECK INJECTOR OPERATION, VOLTAGE AND RESISTANCE

1. While cranking engine, check that each injector emits a clicking sound. Use a stethoscope or place a screwdriver on the injectors for this test.
2. Disconnect each injector connector (F109).
3. Turn ignition "ON" and measure voltage between male connector (F109)1 and ground. It should be above 9V.
4. Measure resistance between connector terminals as follows:

Connector & terminal: Resistance:
(F109)1-(F109)2 10 - 18 Ohms
(F109)1-(F109)3 10 - 18 Ohms
(F109)1-(F109)4 10 - 18 Ohms

ECU/Crank Angle Sensor Harness Testing:

CHECK ECU VOLTAGE AND RESISTANCE

1. Connect injector connector (F109) and turn ignition "ON."
2. Measure voltage between ECU connector terminals and ground as follows:

Connector & terminal: Voltage:
(F119)12-Ground Above 8V
(F119)25-Ground Above 8V
(F119)11-Ground Above 8V

3. Turn ignition "OFF" and disconnect ECU connector.
4. Measure resistance between ECU connector terminals and ground as follows:

Connector & terminal: Resistance:
(F119)13-Ground Below 10 Ohms
(F119)26-Ground Below 10 Ohms