4 Ignition Coil Driver Open Circuits & Defective SMEC

1. Connect diagnostic read-out tool to engine diagnostic connector, then turn ignition switch to Run position.
2. If display screen is blank, refer to ``Obtaining Fault Codes And Messages.'' If display screen is not blank, select system ``Engines.''
3. If display reads ``No Response,'' refer to diagnostic read-out tool problems and messages. If display does not read ``No Response,'' read fault data, then erase faults.
4. Crank engine for 7 seconds, then read faults.
5. If display does not read ``Inj 1 Control Ckt,'' disregard other faults, then proceed to Test 5. If display reads ``Inj 1 Control Ckt,'' turn ignition switch Off, then disconnect diagnostic read-out tool.
6. Disconnect ignition coil wire from distributor cap, then place 1/4 from a good ground.
7. Disconnect 60-way connector from SMEC, then inspect connector for damaged terminals.
8. If any terminals are damaged, repair as necessary, then proceed to Test 16. If no terminals are damaged, connect a jumper wire between terminal 58 and ground, then connect a jumper wire to terminal 34, then turn ignition switch On.
9. Touch free end of jumper wire repeatedly to a good ground and observe coil wire for spark.
10. If there was a good spark from coil wire, replace SMEC, then proceed to Test 16.
11. If there was no spark, turn ignition switch Off, disconnect 14-way connector from SMEC, then inspect for damaged terminals.
12. If there are damaged terminals, repair as necessary, then proceed to Test 16.
13. If there are no damaged terminals, connect an ohmmeter between terminal No. 34 of 60-way connector and terminal No. 13 of 14-way connector. If ohmmeter shows continuity, replace SMEC and proceed to Test 16.
14. If ohmmeter does not show continuity, repair open circuit in K15 wire between 60-way and 14-way connectors, then proceed to Test 16.