P1340

2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1340: Camshaft Position Sensor "A" (Bank 1 Sensor 2)

DTC P1340 - Camshaft Position Sensor "A" (Bank 1 Sensor 2)

DESCRIPTION

The camshaft position sensor (G signal) consists of a magnet and MRE element.
The camshaft drive gear (LH) has 3 teeth on its inner circumference. When the camshaft gear rotates, air gap changes between the protrusion on the gear and the pickup coil. The change affects the magnetic field and results in changes in the resistance of the MRE element.
The crankshaft signal plate has 34 teeth and is mounted on the crankshaft. The crankshaft position sensor generates 34 signals at every engine revolution. The ECM detects the standard crankshaft angle based on the G signal and the actual crankshaft angle and the engine speed by the NE signal.





MONITOR DESCRIPTION

If there is no signal from the camshaft position sensor even though the engine is turning, or if the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All:





Camshaft position sensor range check:





Camshaft position / Crankshaft position misalignment:





TYPICAL MALFUNCTION THRESHOLDS

Camshaft position sensor range check:





Camshaft position / Crankshaft position misalignment:





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT: Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)




(a) Disconnect the C1 camshaft position sensor connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage between terminal 3 of the camshaft position sensor connector and body ground.
Standard voltage:





(d) Reconnect the camshaft position sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

2. CHECK ECM TERMINAL VOLTAGE




(a) Inspect the ECM using an oscilloscope.
(1) While the engine is idling, check the waveform between the terminals of the ECM connector.
Standard voltage:





- *1: Crank angle
- *2: 180°
- *3: 120°
- *4: 60°

OK -- REPLACE ECM

NG -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (ECM - CAMSHAFT POSITION SENSOR)




(a) Disconnect the C1 Camshaft position sensor connector.
(b) Disconnect the E6 ECM connector.
(c) Measure the resistance between wire harness side connectors.
Standard resistance:





(d) Reconnect the ECM connector.
(e) Reconnect the Camshaft position sensor connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. INSPECT SENSOR INSTALLATION




(a) Check the camshaft position sensor installation.
OK:
The camshaft position sensor is installed properly.

NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.

5. INSPECT CAMSHAFT TIMING PULLEY LH (SIGNAL PLATE TOOTH)

NG -- REPLACE CAMSHAFT TIMING PULLEY LH
OK -- REPLACE CAMSHAFT POSITION SENSOR