California

Injector Circuit:

To test the Injectors, located between the fuel rail and the head, proceed as follows.

Injector Audio Operational Test:

Using a stethoscope, check the operational sound (tick) made by the injectors (one at a time) during idle or cranking. Check that the sound is produced at shorter intervals as the engine speed increases.

CAUTION: Other injectors may produce sound as they operate even if the injector under checking does not operate. Ensure that the sound from an adjacent injector is not being transmitted along the delivery pipe to an inoperative injector.

Injector Resistance Test Hook-up:

RESISTANCE MEASUREMENT BETWEEN TERMINALS:
1. Disconnect the connector for the injector.
2. Measure the resistance between the terminals.

Standard Value...13-16 ohm (@20°C/68°F)


HARNESS TEST:

Measure the power supply voltage to the injector.
1. Disconnect the injector harness connector.
2. Turn ignition switch to "On" position.
3. measure voltage at injector harness terminal #2
Voltage:
System Voltage

Check for an open circuit, or short to ground between the ECU and the injectors..
1. Disconnect the ECU harness connector.
2. Disconnect the injector harness connector.
3. Check for continuity between injector harness terminal #1, and the appropriate ECU harness connector terminal 13, 26, 12, 25.

Continuity:
Should Exist