P0342

2ZR-FE ENGINE CONTROL: SFI SYSTEM: P0340,P0342,P0343: Camshaft Position Sensor Circuit Malfunction

DESCRIPTION

The camshaft position sensor for intake camshaft (G signal sensor) consists of a magnet and MRE element.

The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the timing rotor and MRE element, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, and uses the pulse signals to determine the camshaft angle, which it sends to the ECM. Then the ECM uses this data to control fuel injection time and injection timing.

HINT
DTC P0340 indicates a malfunction relating to the camshaft position sensor circuit (the wire harness between the ECM and camshaft position sensor, and the camshaft position sensor itself).

Reference: Inspection using an oscilloscope P0335.

MONITOR DESCRIPTION

If no signal is transmitted by the camshaft position sensor despite the engine revolving, or the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.

If the malfunction is not repaired successfully, the DTC is set 10 seconds after the engine is nest started.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

All

All:

P0340 Camshaft Position Sensor Range Check (Cranking)

P0340 Camshaft Position Sensor Range Check (Cranking):

P0340 Camshaft Position/Crankshaft Position Misalignment

P0340 Camshaft Position/Crankshaft Position Misalignment:

P0340, P0342, P0343 Camshaft Position Sensor Range Check

P0340, P0342, P0343 Camshaft Position Sensor Range Check:

TYPICAL MALFUNCTION THRESHOLDS

P0340 Camshaft Position Sensor Range Check (Cranking)

P0340 Camshaft Position Sensor Range Check (Cranking):

P0340 Camshaft Position/Crankshaft Position Misalignment

P0340 Camshaft Position/Crankshaft Position Misalignment:

P0340 Camshaft Position Sensor Range Check

P0340 Camshaft Position Sensor Range Check:

P0342 Camshaft Position Sensor Range Check

P0342 Camshaft Position Sensor Range Check:

P0343 Camshaft Position Sensor Range Check

P0343 Camshaft Position Sensor Range Check:

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Refer to DTC P0335 P0335.

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.
- If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

PROCEDURE

1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0340, P0342 AND P0343)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(e) Read the DTCs.

Result:

HINT
If any DTCs other than P0340, P0342 and P0343 are output, troubleshoot those DTCs first.

B -- GO TO DTC CHART Engine Control System - SFI System
A -- Continue to next step.

2. INSPECT CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT) (POWER SOURCE)

(a) Disconnect the camshaft position sensor (for intake camshaft) 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 camshaft position sensor (for intake camshaft) connector.

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

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

(a) Disconnect the camshaft position sensor (for intake camshaft) 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 camshaft position sensor (for intake camshaft) connector.

(e) Reconnect the ECM connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)
OK -- Continue to next step.

4. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR FOR INTAKE CAMSHAFT)

(a) Check the camshaft position sensor (for intake camshaft) installation.

OK:

Sensor is installed correctly.

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

5. INSPECT INTAKE CAMSHAFT (TIMING ROTOR)

(a) Check the timing rotor of the intake camshaft.

OK:

Camshaft timing rotor does not have any cracks or deformation.

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

6. REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

(a) Replace the camshaft position sensor Removal.

NEXT -- Continue to next step.

7. CHECK WHETHER DTC OUTPUT RECURS (P0340, P0342 OR P0343)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs DTC Check / Clear.

(e) Start the engine and allow the engine to idle for 10 seconds or more.

(f) Turn the ignition off.

(g) Start the engine again and allow the engine to idle for 10 seconds or more.

(h) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(i) Read the DTCs.

Result:

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

B -- END
A -- Continue to next step.

8. ADJUST VALVE TIMING

HINT
There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to match-up the alignment marks Removal.

NEXT -- Continue to next step.

9. CHECK WHETHER DTC OUTPUT RECURS (P0340, P0342 OR P0343)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs DTC Check / Clear.

(e) Start the engine and allow the engine to idle for 10 seconds or more.

(f) Turn the ignition switch off.

(g) Start the engine again and allow the engine to idle for 10 seconds or more.

(h) Enter the following menus: Powertrain / Engine and ECT / Trouble codes.

(i) Read the DTCs.

Result:

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

B -- REPLACE ECM Removal

A -- END

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

(a) Disconnect the camshaft position sensor (for intake camshaft) 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):