Part 4 of 4

Chart A-3 Engine Cranks But Will Not Run (Part 4 Of 4):

Crankshaft Position Sensor Wiring Circuit:

Condition:
Engine cranks but will not run, or engine may start, but immediately stops running. Battery condition and engine cranking speed are OK and there is adequate fuel in the tank.

Circuit Description:
This engine is equipped with a distributorless ignition system called the Electronic Ignition (EI) system. The primary circuit of the EI system consists of two separate ignition coils, an Ignition Control Module (ICM) and Crankshaft Position (CKP) sensor as well as the related connecting wires and the Ignition Control (IC) portion of the PCM. Each secondary circuit consists of the secondary winding of the coil, two connecting metal strips molded into the coil housing, the spark plug boot/connector assemblies and spark plugs.

Chart Test Description: Number(s) below refer to circled number(s) on the diagnostic chart.

14. This verifies if there is frequency coming from the PCM.
15. This identifies a short in the circuit.
16. This will verify if the open circuit is in the ICM or circuit.
17. If there is a short to battery voltage there will be no frequency response. This will verify if there is a short to the battery.
18. This will determine if the circuit or the ICM is shorted to ground.
19. If ignition control "A" and ignition control "B" are shorted together, there will not be a frequency signal. This determines if ignition control "A" and ignition control "B" are shorted together.