3Zr-Fae Engine Control System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

The Variable Valve Timing (VVT) sensor (G signal) of the intake camshaft consists of a magnet and MRE element.
The VVT camshaft has a timing rotor with 3 teeth on its outer circumference. 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 gear 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 timing and ignition timing.
The crankshaft position sensor plate has 34 teeth. The pickup coil generates 34 signals for each crankshaft revolution. Based on the G signal and actual crankshaft angle, the ECM detects the normal crankshaft angle. Also, based on the NE signal, the ECM detects the engine speed.

DTC No.	DTC Detection Condition	Trouble Area
P0340	The input voltage to the ECM remains at 0.3 V or less, or 4.7 V or higher for more than 5 seconds, when 2 or more seconds have elapsed after turning the ignition switch to ON (1 trip detection logic). No camshaft position sensor signal is sent to the ECM during cranking (2 trip detection logic).	Open or short in camshaft position sensor for intake camshaft circuit Camshaft position sensor for intake camshaft Intake camshaft Timing chain jumped tooth ECM
P0342	The output voltage of the camshaft position sensor is 0.3 V or less for 5 seconds (1 trip detection logic).	Open or short in camshaft position sensor for intake camshaft circuit Camshaft position sensor for intake camshaft Intake camshaft Timing chain jumped tooth ECM
P0343	The output voltage of the camshaft position sensor is 4.7 V or higher for 5 seconds (1 trip detection logic).	Open or short in camshaft position sensor for intake camshaft circuit Camshaft position sensor for intake camshaft Intake camshaft Timing chain jumped tooth ECM

WIRING DIAGRAM

Refer to DTC P0335 (RAV4_ACA30 RM000000TCW0B4X_07.html).

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 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 through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

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

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result
Result
Proceed to
DTC P0340, P0342 or P0343 is output
A
DTC P0340, P0342 or P0343 and other DTCs are output
B
HINT:
If any DTCs other than P0340, P0342 or P0343 are output, troubleshoot those DTCs first.

Result
Result	Proceed to
DTC P0340, P0342 or P0343 is output	A
DTC P0340, P0342 or P0343 and other DTCs are output	B

GO TO DTC CHART (RAV4_ACA30 RM000000PDF07OX.html)

A

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

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.3Zr-Fae Engine Control System.Sfi System.
Dtc
P0340 Camshaft Position Sensor Circuit Malfunction

Disconnect the camshaft position sensor connector.

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
B123-3 (VC) - Body ground
Ignition switch ON
4.5 to 5.0 V
Text in Illustration
*1
Front view of wire harness connector
(to Camshaft Position Sensor)

Text in Illustration
*1	Front view of wire harness connector (to Camshaft Position Sensor)

Reconnect the camshaft position sensor connector.

Go to step 10

OK

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

Disconnect the camshaft position sensor connector.

Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection
Condition
Specified Condition
B123-1 (VV1+) - B32-94 (G2+)
Always
Below 1 Ω
B123-2 (VV1-) - B32-118 (G2-)
Always
Below 1 Ω
Standard Resistance (Check for Short):
Tester Connection
Condition
Specified Condition
B123-1 (VV1+) or B32-94 (G2+) - Body ground
Always
10 kΩ or higher
B123-2 (VV1-) or B32-118 (G2-) - Body ground
Always
10 kΩ or higher
Text in Illustration
*1
Front view of wire harness connector
(to Camshaft Position Sensor)
*2
Front view of wire harness connector
(to ECM)

Text in Illustration
*1	Front view of wire harness connector (to Camshaft Position Sensor)
*2	Front view of wire harness connector (to ECM)

Reconnect the camshaft position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT POSITION SENSOR FOR INTAKE CAMSHAFT - ECM)

OK

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

Check the camshaft position sensor installation.
OK:
Sensor is installed correctly.

SECURELY REINSTALL CAMSHAFT POSITION SENSOR FOR INTAKE CAMSHAFT (RAV4_ACA30 RM000002WR500UX.html)

OK

5.CHECK INTAKE CAMSHAFT

Check the teeth of the intake camshaft.
OK:
Camshaft teeth do not have any cracks or deformation.

REPLACE INTAKE CAMSHAFT (RAV4_ACA30 RM0000027IB01JX.html)

OK

6.REPLACE CAMSHAFT POSITION SENSOR FOR INTAKE CAMSHAFT

Replace the camshaft position sensor for intake camshaft (RAV4_ACA30 RM000002WR500UX.html).

NEXT

7.CHECK WHETHER DTC OUTPUT RECURS

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Clear the DTCs (RAV4_ACA30 RM000000PDK0BLX.html).

Start the engine.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result
Result
Proceed to
DTC P0340, P0342 or P0343 is output
A
DTC is not output
B
HINT:
If the engine does not start, replace the ECM.

Result
Result	Proceed to
DTC P0340, P0342 or P0343 is output	A
DTC is not output	B

END

A

8.ADJUST VALVE TIMING

HINT:

There are no marks on the cylinder head to align for the purpose of checking valve timing. Valve timing can only be inspected by aligning the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to align the timing marks (RAV4_ACA30 RM0000027I901JX_03_0377.html).

NEXT

9.CHECK WHETHER DTC OUTPUT RECURS

Connect the intelligent tester to the DLC3.

Turn the ignition switch to ON.

Turn the tester on.

Clear the DTCs (RAV4_ACA30 RM000000PDK0BLX.html).

Start the engine.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.

Result
Result
Proceed to
DTC is not output
A
DTC P0340, P0342 or P0343 are output
B
HINT:
If the engine does not start, replace the ECM.

Result
Result	Proceed to
DTC is not output	A
DTC P0340, P0342 or P0343 are output	B

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

END

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

Disconnect the camshaft position sensor connector.

Disconnect the ECM connector.

Measure the resistance according to the value(s) in the table below.
Standard Resistance (Check for Open):
Tester Connection
Condition
Specified Condition
B123-3 (VC) - B32-119 (VCV1)
Always
Below 1 Ω
Standard Resistance (Check for Short):
Tester Connection
Condition
Specified Condition
B123-3 (VC) or B32-119 (VCV1) - Body ground
Always
10 kΩ or higher
Text in Illustration
*1
Front view of wire harness connector
(to Camshaft Position Sensor)
*2
Front view of wire harness connector
(to ECM)

Reconnect the camshaft position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT POSITION SENSOR FOR INTAKE CAMSHAFT - ECM)

REPLACE ECM (RAV4_ACA30 RM0000017UO01KX.html)

Tester Connection	Switch Condition	Specified Condition
B123-3 (VC) - Body ground	Ignition switch ON	4.5 to 5.0 V

Tester Connection	Condition	Specified Condition
B123-1 (VV1+) - B32-94 (G2+)	Always	Below 1 Ω
B123-2 (VV1-) - B32-118 (G2-)	Always	Below 1 Ω