3Gr-Fe Engine Control System. Dtc P0365 Camshaft Position Sensor B Circuit (Bank 1)

Engine. Lexus Gs430, Gs300. Uzs190 Grs190

3Gr-Fe Engine Control System. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ECM TERMINAL VOLTAGE

CHECK VVT SENSOR (SENSOR POWER SOURCE)

CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)

CHECK SENSOR INSTALLATION (VVT SENSOR OR EXHAUST CAMSHAFT)

CHECK EXHAUST CAMSHAFT

DTC P0365 Camshaft Position Sensor "B" Circuit (Bank 1)

DTC P0367 Camshaft Position Sensor "B" Circuit Low Input (Bank 1)

DTC P0368 Camshaft Position Sensor "B" Circuit High Input (Bank 1)

DTC P0390 Camshaft Position Sensor "B" Circuit (Bank 2)

DTC P0392 Camshaft Position Sensor "B" Circuit Low Input (Bank 2)

DTC P0393 Camshaft Position Sensor "B" Circuit High Input (Bank 2)

DESCRIPTION

The exhaust camshaft's Variable Valve Timing (VVT) sensor (G signal) consists of a magnet and MRE 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 pickup coil, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the exhaust 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. The crankshaft angle sensor plate has 34 teeth. The pickup coil generates 34 signals for each engine revolution. Based 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
P0365 P0390	Input voltage to ECM remains 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 engine switch on (IG) (1 trip detection logic) No VVT sensor signal to ECM during cranking (1 trip detection logic)	Open or short in VVT sensor for exhaust camshaft circuit VVT sensor for exhaust camshaft Exhaust camshaft Jumped tooth of timing chain ECM
P0367 P0392	Output voltage of VVT sensor 0.3 V or less for 5 seconds (1 trip detection logic)	Open or short in VVT sensor for exhaust camshaft circuit VVT sensor for exhaust camshaft Exhaust camshaft Jumped tooth of timing chain ECM
P0368 P0393	Output voltage of VVT sensor 4.7 V or more for 5 seconds (1 trip detection logic)	Open or short in VVT sensor for exhaust camshaft circuit VVT sensor for exhaust camshaft Exhaust camshaft Jumped tooth of timing chain ECM

Lexus Gs430, Gs300. Uzs190 Grs190.3Gr-Fe Engine Control System.Sfi System.
Dtc
P0365 Camshaft Position Sensor B Circuit (Bank 1)

Reference: Inspection using an oscilloscope

HINT:

The correct waveform is shown.
EV1+ and EV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
Item
Content
Terminal
NE+ - NE-
EV1+ - EV1-
EV2+ - EV2-
Equipment Setting
5 V/DIV., 20 msec./DIV.
Condition
Cranking or idling

MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor despite the engine revolting, or the rotations of the camshaft and the crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.

WIRING DIAGRAM

Refer to DTC P0335 on page Click here.

INSPECTION PROCEDURE

Read freeze frame data using the intelligent tester. 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.

1.CHECK ECM TERMINAL VOLTAGE

Inspect the ECM using an oscilloscope.
1. While the engine is idling, check the waveform between the terminals of the ECM connector.
  Standard voltage:
  Tester Connection
  Specified Condition
  EV1+ (E6-19) - EV1- (E6-18)
  Correct waveform shown
  EV2+ (E45-13) - EV2- (E45-12)
  Correct waveform shown
  NE+ (E8-32) - NE- (E8-31)
  Correct waveform shown

REPLACE VVT SENSOR

OK

2.CHECK VVT SENSOR (SENSOR POWER SOURCE)

Disconnect the E56 or E62 VVT sensor connector.

Measure the voltage between the terminals of the VVT sensor.
Standard voltage:
Tester Connection
Specified Condition
VC2 (E56-3) - Body ground
4.5 to 5.0 V
VC2 (E62-3) - Body ground
4.5 to 5.0 V

Reconnect the VVT sensor connector.

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

3.CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)

Disconnect the E56 or E62 VVT sensor connector.

Disconnect the E6 or E45 ECM connector.

Measure the resistance.

Standard resistance (Check for open):

Tester Connection	Specified Condition
EX+ (E56-1) - EV1+ (E6-19)	Below 1 Ω
EX- (E56-2) - EV1- (E6-18)	Below 1 Ω
EX+ (E62-1) - EV2+ (E45-13)	Below 1 Ω
EX- (E62-2) - EV2- (E45-12)	Below 1 Ω

Standard resistance (Check for short):

Tester Connection	Specified Condition
EX+ (E56-1) or EV1+ (E6-19) - Body ground	10 kΩ or higher
EX- (E56-2) or EV1- (E6-18) - Body ground	10 kΩ or higher
EX+ (E62-1) or EV2+ (E45-13) - Body ground	10 kΩ or higher
EX- (E62-2) or EV2- (E45-12) - Body ground	10 kΩ or higher

Reconnect the VVT sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

4.CHECK SENSOR INSTALLATION (VVT SENSOR OR EXHAUST CAMSHAFT)

Check the VVT sensor installation.
OK:
Sensor is installed correctly.

SENSOR

OK

5.CHECK EXHAUST CAMSHAFT

Check the teeth of the signal plate.

REPLACE EXHAUST CAMSHAFT

REPLACE ECM

Item	Content
Terminal	NE+ - NE- EV1+ - EV1- EV2+ - EV2-
Equipment Setting	5 V/DIV., 20 msec./DIV.
Condition	Cranking or idling

Tester Connection	Specified Condition
EV1+ (E6-19) - EV1- (E6-18)	Correct waveform shown
EV2+ (E45-13) - EV2- (E45-12)	Correct waveform shown
NE+ (E8-32) - NE- (E8-31)	Correct waveform shown

Tester Connection	Specified Condition
VC2 (E56-3) - Body ground	4.5 to 5.0 V
VC2 (E62-3) - Body ground	4.5 to 5.0 V