Pinpoint Test CKP - Crankshaft Position Sensor

NOTE: Enter this test only when Code 02 is displayed during QUICK TESTS procedure or when directed here from another PINPOINT TEST.

Fig 1: Identifying CKP Circuit & Connector (CKP)

CKP CIRCUIT PIN IDENTIFICATION

Circuit	PCM Pin	BOB Pin	Wire Color
CKP	2E	56	GRN/BLK
GND	2C	16	BLK/LT GRN
VPWR	1B	37, 57	YEL/WHT

1) Turn ignition off. Install BOB. Reconnect PCM. Measure voltage at BOB test pin CKP while bumping starter. If voltage does not alternate between about zero and 5 volts, go to next step. If voltage alternates as specified, CKP circuit is okay. Return to QUICK TESTS if sent here from there; otherwise temporarily substitute known good PCM and repeat test to check for improvement.

2) Turn ignition off. Unplug 6-pin distributor connector. Turn ignition on. Measure voltage on VPWR (Yellow/Black) wire at harness connector. If voltage is greater than 10 volts, go to next step. If voltage is not greater than 10 volts, repair VPWR wire to distributor.

3) Turn ignition off. Measure resistance between GND (Black) wire at harness connector and ground. If resistance is less than 5 ohms, go to next step. If resistance is not less than 5 ohms, repair Black wire to ground.

4) Turn ignition off. Install BOB, leaving PCM disconnected. Measure resistance between BOB test pin CKP and CKP wire (Green/Black) at harness connector. If resistance is less than 5 ohms, go to next step. If resistance is not less than 5 ohms, repair Green/Black wire.

5) Turn ignition off. Install BOB, leaving PCM disconnected. Measure resistance between BOB test pin CKP and ground. Measure resistance between CKP (Green/Black) wire and each other wire at harness connector. If all measurements are greater than 10,000 ohms, replace distributor. If any measurement is not greater than 10,000 ohms, repair shorted CKP wire.