The Camshaft Position Sensor (CPS) is located integral to the distributor on 2.4L and 3.0L (12 valve) engines, and is located on the front-upper timing belt cover of 3.0L (24 valve) and 3.5L engines. The CPS detects the top dead center position of the No. 1 cylinder. It sends a signal to the ECM when this position is detected. The ECM uses this information to help it decide how to run the fuel injection sequence, among other functions. The power for the CPS is supplied from the MFI relay and is grounded to the vehicle body. The CPS, by intermitting the flow (to ground) of the 5 volts applied from the ECM, produces the pulse signals.
If there is a malfunction of the CPS, the sequential multiport fuel injection will not be correct. This will result in such problems as engine stalling, unstable idling, and poor acceleration.
| Fig. 1: The CPS, along with the crankshaft position sensor,
is located inside of the distributor — 2.4L engines
|
| Fig. 2: The CPS and CSPS harness connector is mounted
on the firewall on Pick-up trucks equipped with the 2.4L engine
|
| Fig. 3: On 3.0L (12 valve) engines, the CPS and CSPS
are located inside of the distributor
|
| Fig. 4: The CPS location under the upper left-hand timing
belt cover — 3.0L (24 valve) and 3.5L engines
|
| Fig. 5: The location of the CPS harness connector — 3.0L
(24 valve) engines
|
| Fig. 6: The location of the CPS harness connector — 3.5L
engines
|
