Grand Cherokee 4WD L6-4.0L VIN S (1997)
necessary
12. While observing the voltmeter, crank the engine with ignition switch. The voltmeter needle should fluctuate between 0 and 5 volts while the
engine is cranking. This verifies that the camshaft position sensor in the distributor is operating properly and a sync pulse signal is being
generated.
If sync pulse signal is not present, replacement of the camshaft position sensor is necessary