P0390

2GR-FE ENGINE CONTROL: SFI SYSTEM: P0365, P0367, P0368, P0390, P0392, P0393: Camshaft Position Sensor "B" Circuit (Bank 1)


DESCRIPTION

The VVT sensor (for exhaust side) consists of a magnet and MRE (Magneto Resistive Element).

The exhaust camshaft has a sensor plate with 3 teeth on its outer circumference.

When the exhaust camshaft rotates, changes occur in the air gaps between the 3 teeth and MRE, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The VVT sensor (for exhaust side) converts the exhaust camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.

The crankshaft (crank angle sensor plate) has 34 teeth. The pickup coil generates 34 signals for each engine rotation. Based on combination of the VVT signals and NE signal, the ECM detects the crankshaft angle. Then the ECM uses this data to control fuel injection time and injection timing. Also, based on the NE signal, the ECM detects the engine speed.









Reference: Inspection using an oscilloscope

HINT
* The correct waveform is as shown in the illustration.
* The wavelength becomes shorter as the engine speed increases.
* EV1+ and EV2+ stand for the VVT sensor (for exhaust side) signal, and NE+ stands for the crankshaft position sensor signal.






MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor (for exhaust side) despite the engine revolving, the ECM interprets this as a malfunction of the sensor.

When the sensor output voltage remains less than 0.3 V, or more than 4.7 V for more than 5 seconds, the ECM stores a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





P0365 and P0390: VVT Sensor (for exhaust side of bank 1, 2) Verify Pulse Input





P0367, P0368, P0392, P0393: VVT Sensor (for exhaust side of bank 1, 2) Range Check (Low Voltage, High Voltage)





TYPICAL MALFUNCTION THRESHOLDS

P0365 and P0390: VVT Sensor (for exhaust side of bank 1, 2) Verify Pulse Input





P0367 and P0392: VVT Sensor (for exhaust side of bank 1, 2) Range Check (Low Voltage)





P0368 and P0393: VVT Sensor (for exhaust side of bank 1, 2) Range Check (High Voltage)





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream on.

3. Clear DTCs (even if no DTCs are stored, perform the clear DTC procedure) Reading and Clearing Diagnostic Trouble Codes.

4. Turn the ignition switch off and wait for at least 30 seconds.

5. Turn the ignition switch to ON and turn the Techstream on [A].

6. Start the engine.

7. Idle the engine for 10 seconds [B].

8. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

9. Input the DTC: P0365, P0367, P0368, P0390, P0392 or P0393.

10. Check the DTC judgment result [C].





HINT
* If the judgment result shows ABNORMAL, the system has a malfunction.
* If the judgment result shows INCOMPLETE or N/A, perform steps [B] and [C] again.

11. If the test result is N/A, enter the following menus: Powertrain / Engine / Trouble Codes.

12. Read Pending DTCs.

HINT
If a pending DTC is output, the system is malfunctioning.

13. If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
* If a permanent DTC is output, the system is malfunctioning.
* If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

Refer to DTC P0335 SFI System.

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 help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
* If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
* Bank 1 refers to the bank that includes the No. 1 cylinder*.
*: The No. 1 cylinder is the cylinder which is farthest from the transaxle.
* Bank 2 refers to the bank that does not include the No. 1 cylinder.

PROCEDURE

1. CHECK VVT SENSOR (FOR EXHAUST SIDE) (SENSOR POWER SOURCE)

(a) Disconnect the VVT sensor (for exhaust side) connector.





(b) Turn the ignition switch to ON.

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration





NG -- CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR EXHAUST SIDE) - ECM)
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR EXHAUST SIDE) - ECM)

(a) Disconnect the VVT sensor (for exhaust side) connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





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

3. CHECK SENSOR INSTALLATION (VVT SENSOR (FOR EXHAUST SIDE))

(a) Check the VVT sensor (for exhaust side) installation.





OK:

Sensor is installed correctly.

NG -- SECURELY REINSTALL VVT SENSOR (FOR EXHAUST SIDE) Installation
OK -- Continue to next step.

4. CHECK EXHAUST CAMSHAFT

(a) Check the teeth of the sensor plate.

OK:

Sensor plate teeth do not have any cracks or deformation.

NG -- REPLACE EXHAUST CAMSHAFT Removal
OK -- Continue to next step.

5. REPLACE VVT SENSOR (FOR EXHAUST SIDE)

(a) Replace the VVT sensor (for exhaust side) Removal.

NEXT -- Continue to next step.

6. CHECK WHETHER DTC OUTPUT RECURS (DTC P0365, P0367, P0368, P0390, P0392 AND/OR P0393)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Turn the ignition switch off and wait for at least 30 seconds.

(f) Turn the ignition switch to ON and turn the Techstream on.

(g) Start the engine and warm it up.

(h) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

(i) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

(j) Input the DTC: P0365, P0367, P0368, P0390, P0392, or P0393.

(k) Check the DTC judgment result.

Result





HINT
If the engine does not start, replace the ECM.

B -- REPLACE ECM Removal

A -- END

7. CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR EXHAUST SIDE) - ECM)

(a) Disconnect the VVT sensor (for exhaust side) connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance (Check for Open):





Standard Resistance (Check for Short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal