Camshaft Position Sensor: Service and Repair
CAMSHAFT POSITION SENSOR^ If the camshaft position sensor or circuit has an open or short, Diagnostic Trouble Code No. PO34O is output.
^ If the camshaft position sensor circuit fails, the engine may stall and not restart.
CAUTION: Prior to the removal of the camshaft position sensor, set No. 1 cylinder to 0 degrees top dead center (TDC) of compression stroke. Then NOTE the position of the camshaft position sensor electrical connector. The installation procedure requires that the connector be located in the same position.
REMOVAL
1. Disconnect battery ground cable.
2. Disconnect fuel charging wiring connector from stator assembly.
3. Remove the CMP sensor retaining screws and camshaft position sensor from synchronizer assembly.
4. If synchronizer assembly is to be removed from the cylinder block, proceed with step 5. If the synchronizer assembly is not being removed, proceed to installation step 6.
5. Remove hold-down clamp.
6. Remove synchronizer assembly from cylinder block.
INSTALLATION
CAUTION:
^ If the replacement synchronizer assembly housing does not contain a plastic locator cover tool, SST must be obtained prior to installation of the replacement synchronizer assembly. Failure to follow this procedure will result in the fuel system being out of time with the engine, possibly causing engine damage.
^ Do not move crankshaft until entire assembly procedure is complete. Doing so will result in the fuel system being out of time with the engine, resulting in possible engine damage.
1. Attach Special Service Tool SST.
2. Align the synchronizer vane with the radial slot of the SST.
3. Rotate the SST on the synchronizer base until the SST's boss engages the base notch.
4. Dip gear end into engine oil to coat gear, thrust washer and lower bearing.
5. Insert the synchronizer assembly (with SST) into the block. The SST should be aimed approximately 75 degrees counterclockwise off the centerline of the engine.
6. Install hold-down clamp.
Tightening torque 18-29 Nm (13-21 ft. lbs.)
CAUTION: If camshaft position sensor electrical connector is not positioned properly, DO NOT reposition the connector by rotating the synchronizer assembly. This will result in the fuel system being out of time with the engine, possibly causing engine damage. Remove the synchronizer assembly and repeat installation procedure, beginning with Step 1.
7. Remove SST.
8. Install CMP sensor and retaining screws.
Tightening torque 1.5-4.0 Nm (14-35 in. lbs.)
9. Connect connector to camshaft position sensor stator assembly.
10. Connect battery ground cable.
NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 16 km (10 miles) or more to relearn the strategy.