Checking Camshaft Position (CMP) Sensor Signal
Checking Camshaft Position Sensor Signal
- Ignition off.
- Connect the test box and check ground terminals.
- Connect engine control module (ECM).
- Ignition on.
- Connect a multimeter between # 21 (# A21) and # 42 (# A42) on the test box.
- Set the multimeter to measure frequency.
- Operate starter motor.
- Frequency should be 1.5 - 2.0 Hz when the engine is turned over by the starter motor.
If reading is OK:
^ Proceed to: Checking Ignition Discharge Module (IDM) section.
If reading is incorrect:
^ Refer to: Testing By Trouble Code / Code EFI-314 Camshaft Position Sensor, Signal.