The 24X CKP sensor is used to improve the idle spark control at engine speeds up to approximately 2000 RPM.
See Figure 1
The best method to test this sensor is with the use of an oscilloscope.
- Visually check the connector, making sure it is connected properly and all of the terminals are straight, tight and free of corrosion.
- With the ignition in the ON position, check the sensor voltage using an oscilloscope. When the starter is briefly operated, a square wave pattern, alternating between 0-12 volts should be seen at terminal B. If the voltage is within specification, the sensor is functional.
- If the voltage falls out of range, use a DVOM to check terminal A for battery positive (B+). If battery positive (B+) is not present, check the circuit continuity and repair as necessary.
- If battery positive (B+) is found at terminal A, check the terminal C for proper ground. If ground is not present, check the circuit for continuity and repair as necessary.
- If the sensor and circuits are functional, the PCM may be faulty.
REMOVAL & INSTALLATION
3.1L (VIN M) Engine
See Figures 2 and 3
- Be sure the ignition is in the OFF or LOCK position, then disconnect the negative battery cable.
- Remove the serpentine belt from the crankshaft pulley.
- Raise and support the vehicle safely.
Remove the crankshaft harmonic balancer assembly from the front of the engine, as follows:
- Remove the bolt and washer from the crankshaft harmonic balancer.
- Remove the retaining bolts from the crankshaft pulley, then remove the pulley from the balancer.
- Using J-24420-B or an equivalent torsional damper remover, pull the balancer from the crankshaft.Note the routing of the CKP sensor harness before removal.
- Remove the harness retaining clip with the bolt. Detach the sensor harness connector.
- Remove the sensor retaining bolts, then remove the sensor from the engine.
- Install the sensor to the engine and tighten the retaining bolts to 8 ft. lbs. (10 Nm).
- Route the harness as noted during removal, then install the harness retaining clip and secure with the bolt. Tighten the bolt to 8 ft. lbs. (10 Nm).
- Attach the sensor electrical connector.
- Use J-29113, or an equivalent installer, to pull the balancer onto the crankshaft. Install the crankshaft balancer bolt and tighten it to 110 ft. lbs. (150 Nm).
- Install and tighten the crankshaft pulley bolts.
- Install the serpentine drive belt.
- Carefully lower the vehicle.
- Connect the negative battery cable.