P1343

2UZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1340: Camshaft Position Sensor "A" (Bank 1 Sensor 2)

DTC P1340 - Camshaft Position Sensor "A" (Bank 1 Sensor 2)

DTC P1342 - Camshaft Position Sensor "A" Low Input (MRE)

DTC P1343 - Camshaft Position Sensor "A" High Input (MRE)

DESCRIPTION

The camshaft position sensor (G signal) consists of a magnet, iron core and pickup coil.
The camshaft drive gear (LH) has 3 teeth on its inner circumference. When the camshaft gear rotates, air gap changes between the protrusion on the gear and the pickup coil. The change affects the magnetic field and results in changes in the resistance of the MRE element.
The crankshaft signal plate has 34 teeth and is mounted on the crankshaft. The crankshaft position sensor generates 34 signals at every engine revolution. The ECM detects the standard crankshaft angle based on the G signal, and the actual crankshaft angle and engine speed by the NE signal.






MONITOR DESCRIPTION

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

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





P1340 camshaft position sensor range check:





P1340 camshaft position / crankshaft position misalignment:





P1342, P1343 camshaft position sensor range check:





TYPICAL MALFUNCTION THRESHOLDS

P1340 camshaft position sensor range check:





P1340 camshaft position / crankshaft position misalignment:





P1342 camshaft position sensor range check:





P1343 camshaft position sensor range check:





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

PROCEDURE

1. INSPECT CAMSHAFT POSITION SENSOR (SENSOR POWER SOURCE)




(a) Disconnect the D5 camshaft position sensor connector.
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:






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




(a) Disconnect the D5 camshaft position sensor connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. INSPECT SENSOR INSTALLATION




(a) Check the camshaft position sensor installation.
OK:
The camshaft position sensor is installed properly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
4. INSPECT CAMSHAFT TIMING PULLEY LH (SIGNAL PLATE TOOTH)
(a) Check the teeth of the signal plate.
OK:
Sensor plate teeth do not have any cracks or deformation.
NG -- REPLACE CAMSHAFT TIMING PULLEY LH
OK -- Continue to next step.
5. REPLACE CAMSHAFT POSITION SENSOR
(a) Replace the camshaft position sensor Removal.
NEXT -- Continue to next step.
6. CONFIRM WHETHER DTC OUTPUT RECURS
(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.
(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
(g) Read DTCs.

Result





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

B -- REPLACE ECM
A -- END