Ignition Control Module: Testing and Inspection

IGNITER UNIT INPUT TEST

Igniter Unit:

See CODE [15] IGNITION OUTPUT TEST when the self-diagnostic indicator blinks. Verify that the basic ignition, fuel, and emission control system are operating properly and that the no. 32 (50 A) fuse in the dash fuse box is good before performing an input test for the igniter unit.
1. Remove the distributor cap, the leak cover and the rotor.
2. Disconnect the WHT wire, BLK/YEL wire, WHT/BLU wire, and the BLU wire from the igniter unit.
3. Check for voltage between the BLK/YEL wire and the body ground with the ignition switch on. There should be battery voltage.
a) If there is no voltage, check for an open in the BLK/YEL wire between the igniter unit and the ignition switch.
b) If there is battery voltage, go to step 4.
4. Check for voltage between the WHT/BLU wire and the body ground with the ignition switch on. There should be battery voltage.
a) If there is no voltage, check for:
-Faulty ignition coil.
- An open in the WHT/BLU wire between the igniter unit and the ignition coil.
b) If there is battery voltage, go to step 5.
5. Check for continuity between the WHT wire and the body ground. There should be continuity.
a) If there is no continuity, check for:
- An open in the WHT wire between the igniter unit and the PGM-FI ECU.
-Poor ground (G101 or G151).
b) If there is continuity, go to step 6.
6. Check for continuity between the BLU wire and the body ground. There should be continuity.
a) If there is no continuity, check for:
- An open in the BLU wire between the igniter unit and the tachometer or the A/T control unit.
-Poor ground (G151 or G301, G401).
b) If there is continuity, go to step 7.
7. If all continuity and voltage tests are normal, but the engine won't start, replace the igniter unit.