Scion 90919-05026 Sensor, Crank Position

Camshaft Position Sensor are utilized on four-cylinder models, while VVT sensors are utilized on V6 engine models. For 2009 and earlier models, the sensor is located on the left side of the cylinder head below the valve cover. To remove, begin by removing the air filter housing, followed by disconnecting the electrical connector. Unbolt the sensor and remove. Installation is the reverse of removal. For 2010 and later models, the sensor(s) are mounted on the top of the valve cover. To remove them, the harness electrical connector needs to be disconnected, followed by removing the mounting screws and taking out the camshaft sensor(s) from the valve cover. Installation is the reverse of removal.

The camshaft position sensor determines the position of the cylinder for sequential fuel injection signals to each cylinder and is mounted on the cylinder head near the intake runner for cylinder no. 4, secured with one bolt. A problem in the camshaft sensor circuit will set a diagnostic trouble code. Ensure the ignition key is in the OFF position, then remove the engine cover. Disconnect the harness connector, remove the mounting bolt, and take out the camshaft sensor from the cylinder head. Installation is the reverse of removal, using a new O-ring lightly coated with engine oil.

For four-cylinder models, start by disconnecting the negative battery cable. The CKP sensor is situated on the timing chain cover next to the crankshaft damper pulley. Disconnect the electrical connector, which is to the right of the exhaust manifold on four-cylinder engines. Raise the front of the vehicle and secure it on jackstands. Remove the CKP sensor mounting bolt to take off the sensor. Installation is the reverse. In V6 models with 3.0L and 3.3L engines, disconnect the negative battery cable, disconnect the electrical connector from the CKP sensor, and remove the sensor mounting bolt. For 3.5L engines, follow the specified steps to access the CKP sensor located at the front tower's right corner. Disconnect the sensor's electrical connector and remove it. In 2GR-FKS models, raise the right side of the vehicle on jackstands, remove the left exhaust manifold, engine oil cooler hose bracket nut, and sensor shield bolts. Slide out the bracket from under the oil cooler hoses, disconnect the sensor's electrical connector, remove the sensor, and apply clean engine oil to the O-ring before reinstalling and tightening the retaining bolt securely.

For four-cylinder models, start by disconnecting the negative battery cable. If needed, remove the engine cover and air intake duct for more workspace. Disconnect the electrical connector from the CMP sensors. To remove the CMP sensor from the cylinder head on a 2AZ-FE engine, disconnect the electrical connector and the sensor mounting bolt. Remove the sensor, checking the O-ring's condition; replace if damaged. Installation is the reverse. For V6 models, begin by disconnecting the negative battery cable and removing the engine cover. The CMP sensors on 3.0L and 3.3L engines are located on the left ends of the front and rear cylinder heads. Disconnect the electrical connector from the front CMP sensor and remove its mounting bolt. For the rear CMP sensor, loosen the wheel lug nuts for the front left wheel, raise the vehicle, and remove the wheel. Turn the steering wheel right, locate the sensor between the transaxle bellhousing and stabilizer bar, and remove it as previously described. Installation for both front and rear CMP sensors follows the removal steps in reverse.

The Crankshaft Position(CKP) sensor determines the timing for the fuel injection and ignition on each cylinder. The crankshaft sensor is mounted on the timing chain cover next to the crankshaft pulley. A problem in the crankshaft sensor circuit will set a diagnostic trouble code. Loosen the right front wheel lug nuts. Disconnect the cable from the negative battery terminal. Raise the front of the vehicle and support it securely on jack stands. Remove the wheel and the inner fender shield. Remove the two bolts(one secures the sensor, the other is close by and secures the harness) and detach the sensor. At the upper part of the timing chain cover, disconnect the harness connector and remove the harness and sensor. Installation is the reverse of removal. Be sure to use a new O-ring on the sensor, lightly coated with engine oil.

The crankshaft position sensor (CKP) is responsible for determining the timing of fuel injection and ignition on each cylinder. In four-cylinder models, the sensor is located under the timing belt cover, while in V6 models, it is mounted outside the cover above the crankshaft pulley. To check the sensor, disconnect the electrical connector and use an ohmmeter to probe the terminals. If the test results are correct, there may be an issue with the harness or the PCM, which should be diagnosed if necessary. Removal of the sensor requires removing the timing belt cover on four-cylinder models and the inner fender shield on V6 models, disconnecting the electrical connector, and removing the bolt to detach the sensor. Installation is the reverse of removal.

The camshaft position sensor affects the position for constant fuel injection in each cylinder. On four-cylinder engines, it is on the back of the cylinder head, while V6 engines have it on the front. If there is a problem with the camshaft sensor circuits, it will send a diagnostic trouble code. To check the camshaft sensor, begin by disconnecting the electrical connector at the sensor. Use an ohmmeter to probe the two terminals. For camshaft sensor replacement, ensure the ignition key is in the OFF position. Disconnect the harness connector, remove the mounting screws, and proceed to remove the camshaft sensor from the cylinder head.

It is the Camshaft Position (CMP) sensor that gives a signal for sequential fuel injection of each cylinder. The camshaft sensor is mounted on the cylinder head close to the intake runner for cylinder no. 4. A diagnostic trouble code will be registered if there is a fault in the camshaft sensor circuit. Ensure that the ignition key is in the OFF position. Take off the engine cover. Disconnect the harness connector, remove mounting bolt, and then take out camshaft sensor from cylinder head. Installation is opposite to removal procedures. Get a new O-ring that has been lightly coated with engine oil.

The coolant temperature sensor on four-cylinder engines is located on the rear of the cylinder head, while on the 3.0L V6 engine, it is found on the intake manifold beneath the air intake plenum at the rear, and on the 3.4L V6 engine, it is positioned behind the timing belt cover on the top of the intake manifold. Before installing a new sensor, wrap the threads with Teflon sealing tape to prevent leakage and corrosion. To remove the sensor, release the locking tab, unplug the electrical connector, and carefully unscrew it, taking care not to damage the sensor as it affects the fuel injection system. Install the new sensor quickly to minimize coolant loss and check the coolant level afterward. The Mass Airflow Sensor (MAF) is located on the air intake duct and measures the mass of air entering the engine; to replace it, disconnect the electrical connector, remove the air cleaner assembly, and lift the MAF sensor assembly from the air cleaner. The vane airflow sensor, found on 1993 and 1994 3.0L V6 engines, measures the volume of air entering the engine and is removed similarly. The Intake Air Temperature (IAT) sensor is located inside the air cleaner housing and is removed by unplugging the electrical connector and twisting it out of the rubber boot. Oxygen sensors, which monitor the oxygen content of exhaust gases, are located in the exhaust manifold or pipe; precautions include avoiding damage to the pigtail and ensuring air circulation to the sensor. Disconnect the battery before removing the oxygen sensor, and use anti-seize compound on the threads during installation. The Throttle Position Sensor (TPS) measures the throttle valve position and is located on the throttle body; it is removed by disconnecting the electrical connector and unscrewing it. The crankshaft position sensor is mounted in the timing cover for four-cylinder engines and on the oil pump for 3.4L V6 models, while the camshaft position sensor is located above the intake manifold for four-cylinder models and behind the timing belt cover for 3.4L V6 models. Knock sensors, located below the intake manifold, control spark knock by retarding ignition timing and require coolant drainage for access. The Vehicle Speed Sensor (VSS) is found at the rear of the transmission housing and sends a voltage signal to the ECM. Lastly, the EGR gas temperature sensor, mounted near the EGA valve, detects exhaust temperature and regulates EGA on/off time efficiently.

Start by disconnecting the cable from the negative battery terminal.

Installation is the reverse of removal. Be sure to tighten the CMP sensor retaining bolt and stud securely.

Raise the front of the vehicle and support it securely on jackstands, then remove the wheel and the inner fender shield.

After removing the CKP sensor, installation is the reverse of removal. Be sure to tighten the CKP sensor retaining bolt securely.