Chrysler Electronic Ignition
No Spark Condition Testing Procedure


1 Measure Battery Voltage at the Battery while Cranking. Minimum requirement is 9.6 V DC.
2 Remove Coil wire from center of Distributor Cap, connect a spark tester and it clip to a good ground. Connect one end of a jumper wire to the Coil -, turn Key ON. Drag or tap other end of jumper wire on a good ground. A small spark should be observed.
3 If no spark is observed, turn Key OFF, disconnect wire plug from Ignition Control Module (ICM) aka ECU, turn Key ON, drag or tap jumper wire to good ground. If a spark is observed, REPLACE THE ICM.
4 If no spark is observed, check voltage at Coil +. It should be within 1 volt of battery voltage. If yes, check Coil -. It should be within 1 volt of battery voltage. If no voltage is present, check wiring.
5 If voltage is present at the Coil -, but no spark occurs when arcing the Col – jumper wire to ground, REPLACE the COIL.
6 With wire harness plug removed from ICM, turn Key ON. Check for voltage in cavity 2. It should be within 1 volt of battery voltage. If no voltage is present but is at Coil -, replace wiring, and repair fault.
7 With Key ON, check for voltage in cavity 1. It should be within 1 volt of battery voltage. If not, check wiring and repair fault. Repeat test while cranking. Voltage should be at least 9.6 V.
8 With Key OFF, check resistance between cavity 4 and cavity 5. It should read 150 to 900 Ohms. If not, disconnect wire from Pick up coil. Check resistance. If out of range, REPLACE the PICK UP COIL. If your two measurements are different, check wiring and repair fault.
9 Check resistance with each of the wires on the Pick up coil to ground. If not open, REPLACE the PICK UP COIL.
10 Check pin 5 of the ICM (not the harness) for ground. If no ground, run dedicated ground wire to body of ICM.
11 If all tests are good, and still no spark, REPLACE the ICM.