Test NS-5A - Fuel Injector Control Circuit & Ignition Coil Control Circuit
NOTE:
For connector terminal identification, see CONNECTOR IDENTIFICATION
. For appropriate wiring diagram, see WIRING DIAGRAMS
at end of article.
- Turn ignition switch to OFF position. Disconnect Direct Ignition System (DIS) ignition coil connector. Turn ignition switch to ON position. Using DRB-II, actuate fuel system. Put DRB-II in voltmeter mode.
- Probe ignition coil connector terminal No. 4 (Dark Green/Red wire). If voltage is more than 10 volts, repair open in Dark Green/Red wire between Auto Shutdown (ASD) relay and injector connectors. Perform VERIFICATION PROCEDURE VER-1. ASD relay is located in power distribution center, in engine compartment. See Fig 1 .
- If voltage is less than 10 volts in step 2), disconnect injector No. 1 connector. See Figure . Using DRB-II, actuate fuel system. Put DRB-II in voltmeter mode.
- Probe injector connector terminal No. 2 (Dark Green/Red wire). If voltage is less than 10 volts, repair Dark Green/Red wire between Direct Ignition System (DIS) coil and ASD relay connectors. Perform VERIFICATION PROCEDURE VER-1. If voltage is more than 10 volts, replace Single Board Engine Controller (SBEC). Perform VERIFICATION PROCEDURE VER-1.