Toyota FJ Cruiser (GSJ 10, 15 series). Manual — part 60

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES–195

ES

OK

(a) Disconnect the B29 CKP sensor connector.
(b) Disconnect the B3 ECM connector.
(c) Check the resistance.

Standard Resistance (Check for open)

Standard Resistance (Check for short)

(d) Reconnect the ECM connector.
(e) Reconnect the CKP sensor connector.

NG

OK

(a) Check the CKP sensor installation.

OK:

Sensor is installed correctly.

NG

OK

(a) Check the teeth of the sensor plate.

OK:

Sensor plate does not have any cracks or
deformation.

2

CHECK HARNESS AND CONNECTOR (CRANKSHAFT POSITION SENSOR - ECM)

B3

Front View

ECM Connector

Wire Harness Side:

B29

Crankshaft Position Sensor Connector

NE+

NE-

NE+

NE-

A116290E03

Tester Connections

Specified Conditions

NE+ (B29-1) - NE+ (B3-21)

Below 1

Ω

NE- (B29-2) - NE- (B3-20)

Tester Connections

Specified Conditions

NE+ (B29-1) or NE+ (B3-21) - Body ground

10 k

Ω or higher

NE- (B29-2) or NE- (B3-20) - Body ground

REPAIR OR REPLACE HARNESS OR
CONNECTOR

3

CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

Clearance

Normal

Abnormal

BR03795E32

TIGHTEN SENSOR

4

CHECK CRANKSHAFT POSITION SENSOR PLATE (TEETH OF SENSOR PLATE
(CRANKSHAFT))

ES–196

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES

NG

OK

REPLACE CRANKSHAFT POSITION
SENSOR PLATE

REPLACE ECM (See page

ES-446

)

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES–197

ES

DESCRIPTION

The intake camshaft's Variable Valve Timing (VVT) sensor (G signal) consists of a magnet and MRE
(Magneto Resistance Element).
The VVT camshaft drive gear has a sensor plate with 3 teeth on its outer circumference. When the gear
rotates, changes occur in the air gaps between the sensor plate and MRE, which affects the magnetic
field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the gear
rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the
ECM.
The crankshaft angle sensor plate has 34 teeth. The pickup coil generates 34 signals for each engine
revolution. Based on the combination of the G signal and NE signal, the ECM detects the crankshaft
angle. Then the ECM uses this data to control fuel injection time and injection timing. Also, based on the
NE signal, the ECM detects the engine speed.

DTC

P0340

Camshaft Position Sensor "A" Circuit (Bank 1
or Single Sensor)

DTC

P0342

Camshaft Position Sensor "A" Circuit Low
Input (Bank 1 or Single Sensor)

DTC

P0343

Camshaft Position Sensor "A" Circuit High
Input (Bank 1 or Single Sensor)

DTC

P0345

Camshaft Position Sensor "A" Circuit (Bank 2)

DTC

P0347

Camshaft Position Sensor "A" Circuit Low
Input (Bank 2)

DTC

P0348

Camshaft Position Sensor "A" Circuit High
Input (Bank 2)

DTC No.

DTC Detection Conditions

Trouble Areas

P0340
P0345

•

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 ignition switch ON (1 trip
detection logic)

•

No VVT sensor signal to ECM during cranking (2 trip
detection logic)

•

Open or short in VVT sensor circuit

•

VVT sensor

•

Camshaft timing gear

•

Jumped tooth of timing chain

•

ECM

P0342
P0347

Output voltage of VVT sensor 0.3 V or less for 5 seconds (1 trip
detection logic)

P0343
P0348

Output voltage of VVT sensor 4.7 V or more for 5 seconds (1
trip detection logic)

ES–198

1GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM

ES

Reference: Inspection using an oscilloscope
HINT:
•

The correct waveform is shown above.

•

VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.

MONITOR DESCRIPTION

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

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

All:

Items

Contents

Terminals

NE+ - NE-

VV1+ - VV1-
VV2+ - VV2-

Equipment Settings

5 V/Division, 20 ms/Division

Conditions

Cranking or idling

Related DTCs

P0340: VVT sensor (Bank 1) range check
P0340: Camshaft position/Crankshaft position misalignment (Bank 1)
P0340: VVT sensor (Bank 1) range check (fluctuating)
P0342: VVT sensor (Bank 1) range check (low voltage)
P0343: VVT sensor (Bank 1) range check (high voltage)
P0345: VVT sensor (Bank 2) range check (while starting engine)
P0345: VVT sensor (Bank 2) range check (after starting engine)
P0345: VVT sensor (Bank 2) range check (fluctuating)
P0347: VVT sensor (Bank 2) range check (low voltage)
P0348: VVT sensor (Bank 2) range check (high voltage)

Required Sensors/Components (Main)

VVT sensors (Banks 1 and 2)

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

Duration

4 seconds:
P0340 (VVT sensor (Bank 1) range check and VVT sensor (Bank 1)
range check (fluctuating)), P0342, P0343 and P0345 (VVT sensor
range check (while starting engine))
5 seconds:
Others

MIL Operation

2 driving cycles:
P0340 (VVT sensor range check), P0345 (VVT sensor range check
(while starting engine))
Immediate:
Others

Sequence of Operation

None

Monitor runs whenever following DTCs not present

None

NE

VV1

VV2

VV1, VV2 and NE Signal Waveforms

GND

GND

GND

G035795E10