Component Testing: Injectors

Connect battery ground cable and turn ignition on. Use a voltmeter to measure between ground and the following terminals at control unit connector: 101, 102, 103, 104, 105 and 106. Battery voltage should be present at all terminals. If so, go to step 3). If not, go to next step.
If battery voltage was not present at terminal, check the appropriate injector. Disconnect battery ground cable and remove connectors at injector. Continuity should exist across terminals on injector. If not, replace injector.
NOTE: Injector circuits are numbered according to cylinder number. For example, injector power circuit 103 goes to cylinder 3, and dropping resistor circuit 53 goes to cylinder 3.
Check dropping resistor by disconnecting connector at dropping resistor unit and measuring between terminal 49 and all other terminals. Resistance should be about 6 ohms. Replace resistor if any circuit is defective.