No Cam Signal at PCM

Name of Code:
No Cam Signal at PCM

When Monitored:
During engine cranking, after 64 crank position signals.

Set Condition:
If no signal from the cam position sensor is present with crank signal, this code will set.

Theory of Operation:
The cam position sensor is a hall effect-type sensor used to detect camshaft position. The powertrain control module (PCM) provides an 8-volt supply, a sensor ground, and a 5-volt pull-up voltage for the sensor. The sensor signal is created by the slots cut in the camshaft sprocket passing under the sensor. When a slot is under the sensor, the signal is high (5V). When the metal between the slots is under the sensor, the signal is low (0.3V).

Possible Causes:
- Open 8-volt supply circuit
- Open sensor ground
- Open or shorted signal circuit
- Damaged sprocket
- Failed sensor
- Failed PCM 3200401
- Connector terminals
- Connector wires
- Excessive sensor clearance