P0393

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0365: Camshaft Position Sensor "B" Circuit (Bank 1)

DTC P0365 - Camshaft Position Sensor "B" Circuit (Bank 1)

DTC P0367 - Camshaft Position Sensor "B" Circuit Low Input (Bank 1)

DTC P0368 - Camshaft Position Sensor "B" Circuit High Input (Bank 1)

DTC P0390 - Camshaft Position Sensor "B" Circuit (Bank 2)

DTC P0392 - Camshaft Position Sensor "B" Circuit Low Input (Bank 2)

DTC P0393 - Camshaft Position Sensor "B" Circuit High Input (Bank 2)

DESCRIPTION

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






MONITOR DESCRIPTION

If no signal is transmitted by the VVT (for exhaust camshaft) sensor despite the engine revolving, or the rotations of the exhaust camshaft and the crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All:





Exhaust Camshaft Sensor Range Check / Rationality (While starting engine):





Exhaust Camshaft Sensor Range Check / Rationality (After starting engine):





Exhaust Camshaft Sensor Range Check (Chattering, Low voltage, High voltage):





TYPICAL MALFUNCTION THRESHOLDS

Exhaust Camshaft Sensor Range Check / Rationality (While starting engine):





Exhaust Camshaft Sensor Range Check / Rationality (After starting engine):





Exhaust Camshaft Sensor Range Check (Chattering):





Exhaust Camshaft Sensor Range Check (Low voltage):





Exhaust Camshaft Sensor Range Check (High voltage):





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester. 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 ECM TERMINAL VOLTAGE





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






OK -- REPLACE ECM
NG -- Continue to next step.
2. CHECK VVT SENSOR FOR EXHAUST CAMSHAFT (SENSOR POWER SOURCE)





(a) Disconnect the VVT sensor connector.
(b) Measure the voltage between terminal 3 and body ground.
Standard voltage:
4.5 to 5.0 V
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR EXHAUST CAMSHAFT - ECM)





(a) Disconnect the VVT sensor for exhaust camshaft connector.
(b) Disconnect the E7 ECM connector.
(c) Measure the resistance between the wire harness side connectors.
Standard resistance:
Check for open






Check for short






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
4. CHECK SENSOR INSTALLATION (VVT SENSOR FOR EXHAUST CAMSHAFT)
(a) Check the VVT sensor installation condition.
OK:
Sensor is installed correctly.
NG -- TIGHTEN SENSOR
OK -- Continue to next step.
5. CHECK EXHAUST CAMSHAFT (TEETH OF PLATE)
(a) Remove the cylinder head cover.
(b) Check the teeth of the signal plate.
NG -- REPLACE EXHAUST CAMSHAFT
OK -- REPLACE VVT SENSOR FOR EXHAUST CAMSHAFT