DTC 3-2-4

3-2-4 CAMSHAFT POSITION (CMP) SENSOR SIGNAL SPORADIC

Condition(s) for DTC
^ The CMP sensor mounted on the camshaft enables the ICM to determine the cylinder in which ignition is required. Since the camshaft describes one revolution for every two crankshaft revolutions, the sensor signal goes high and low on each alternate revolution.
^ The DTC is recorded if the ICM does not detect a signal reversal in the course of an engine revolution.

Substitute value
^ None.

Fault source(s)
^ Loose wiring connection.
^ Chafed wiring.
^ Contact resistance in terminals.
^ Faulty sensor.

Fault symptom(s)
^ Severe engine shudder.

TESTING PROCEDURE





Other DTCs
^ Read other DTCs.

If DI DTC 2-1-4 is recorded:
- Proceed to: DTC 2-1-4 Engine Speed Sensor Signal Sporadic.
If DI DTC 2-1-4 is not recorded:
- Check Status message.





Status message
^ Check current Status Message.

If Status message is: Signal faulty.
- Proceed with testing procedure below.

^ The fault counter indicates the number of starts during which control module has detected a fault-free signal after the DTC has been recorded.





Start engine
^ Try to START engine.

If engine starts:
- Intermittent fault.
- Proceed to: INTERMITTENT FAULT Section below.
If engine does not start:
- Permanent fault.
- Proceed to: DTC 3-1-4 Camshaft Position Sensor Signal Missing.

INTERMITTENT FAULT





Checking wiring and connections
^ Check ICM and sensor connector for loose connections.
^ Check lead between ICM A4 and sensor terminal 2 for intermittent open-circuit, intermittent short-circuit to ground and intermittent short-circuit to supply.
^ Check lead between ICM A14 and sensor connector terminal 3 for intermittent open-circuit and for intermittent short-circuit to ground.
^ Check lead between ICM A15 and sensor connector terminal 1 for intermittent open-circuit.

If above procedure does not detect fault:
- Try with new sensor.