P0342

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0340, P0342, P0343, P0345, P0347, P0348: Camshaft Position Sensor Circuit Malfunction


DESCRIPTION

The VVT sensor (for intake camshaft) (VV1, VV2 signal) consists of a magnet and MRE (Magneto Resistance Element).

The camshaft timing gear assembly has a sensor plate for the VVT sensor. When the intake camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the intake camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.

Then the ECM uses this data to control fuel injection duration, fuel injection timing and Variable Valve Timing (VVT) system.





- Reference: Inspection using an oscilloscope





HINT
* The correct waveform is as shown.
* VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.





MONITOR DESCRIPTION

If no pulse signal is transmitted by the VVT sensor (for intake camshaft) despite the camshaft rotating, or the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.

Also, when the sensor output voltage remains at less than 0.3 V, or higher than 4.7 V for 4 seconds, the ECM stores a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All





P0340: VVT Sensor (Bank 1) Verify Pulse Input (Case 1)





P0340: VVT Sensor (Bank 1) Verify Pulse Input (Case 2)





P0342 and P0343: VVT Sensor (Bank 1) Range Check





P0345: VVT Sensor (Bank 2) Verify Pulse Input





P0347 and P0348: VVT Sensor (Bank 1) Range Check





TYPICAL MALFUNCTION THRESHOLDS

P0340: VVT Sensor (Bank 1) Verify Pulse Input (Case 1)





P0340: VVT Sensor (Bank 1) Verify Pulse Input (Case 2)





P0342 and P0347: VVT Sensor (Bank1, 2) Range Check (Low Voltage)





P0343 and P0348: VVT Sensor (Bank1, 2) Range Check (High voltage)





P0345: VVT Sensor (Bank 2) Verify Pulse Input





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 the 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.

6. Start the engine.

7. Idle the engine for 10 seconds or more [A].

8. Enter the following menus: Powertrain / Engine / Trouble Codes.

9. Read the DTC [B].

HINT
* If a DTC is output, the system is malfunctioning.
* If a DTC is not output, perform the following procedure.

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

11. Input the DTC: P0340, P0342, P0343, P0345, P0347 or P0348.

12. Check the DTC judgment result.





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

13. If no 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 P0335.

INSPECTION PROCEDURE

HINT
* If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.
* 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.
* Read freeze frame data using 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 Freeze Frame Data.

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)

(a) Disconnect the VVT sensor connector.





(b) Turn the ignition switch to ON.

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

Standard voltage:





(d) Reconnect the VVT sensor connector.

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

2. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM)

(a) Disconnect the VVT sensor 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):





(d) Reconnect the VVT sensor connector.

(e) Reconnect the ECM connector.

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

3. CHECK VVT SENSOR FOR INTAKE CAMSHAFT (SENSOR INSTALLATION)

(a) Check the VVT sensor installation condition.





OK:

Sensor is installed correctly.

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

4. CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)

(a) Check the teeth of the signal plate.

OK:

Sensor plate teeth do not have any cracks or deformation.

NG -- REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Disassembly
OK -- Continue to next step.

5. CHECK VALVE TIMING (CHECK FOR LOOSE AND JUMPED TEETH ON TIMING CHAIN) P0011

NG -- ADJUST VALVE TIMING Reassembly
OK -- Continue to next step.

6. REPLACE VVT SENSOR

(a) Replace VVT sensor Removal.

NEXT -- Continue to next step.

7. CHECK WHETHER DTC OUTPUT RECURS

(a) Connect Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

(e) Turn the ignition switch off.

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

(g) Start the engine.

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

(i) Select the following menu items: Powertrain / Engine / Trouble Codes / Pending.

(j) Read the pending DTCs.

Result:





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

B -- REPLACE ECM Removal

A -- END

8. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM)

(a) Disconnect the VVT sensor 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):





(d) Reconnect the VVT sensor connector.

(e) Reconnect the ECM connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal