Toyota Sequoia (2005). Manual - part 103

–

DIAGNOSTICS

ENGINE

DI–215

409

4

Inspect teeth of sensor plate.

PREPARATION:
Remove the crankshaft angle sensor plate (See page 

EM–99

).

CHECK:
Check the teeth of sensor plate.

NG

Replace sensor plate.

OK

Replace ECM (See page 

SF–80

).

DI–216

–

DIAGNOSTICS

ENGINE

410

DTC

P0340

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

DTC

P0341

Camshaft Position Sensor ”A” Circuit Range/Per-
formance (Bank 1 or Single Sensor)

DTC

P0345

Camshaft Position Sensor ”A” Circuit 
(Bank 2)

DTC

P0346

Camshaft Position Sensor ”A” Circuit
Range/Performance (Bank 2)

CIRCUIT DESCRIPTION

The camshaft position sensor consists of a magnet, an iron core and a pick–up coil. This sensor monitors
a timing rotor located on the camshaft and is used by the ECM to detect the camshaft angle. The camshaft
rotation synchronizes with the crankshaft rotation, and this sensor communicates the rotation of the cam-
shaft timing rotor as a pulse signal to the ECM. Based on the signal, the ECM controls fuel injection time
and ignition timing.
If there is no signal from the camshaft position sensor even though the engine is turning or the rotation of
the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction in the sensor
and sets a DTC.

DTC No.

DTC Detection Condition

Trouble Area

P0340

No camshaft position sensor signal to ECM during cranking

(2 trip detection logic)

P0340

P0345

No camshaft position sensor signal to ECM with engine

speed 600 rpm or more (1 trip detection logic)

Open or short in camshaft position sensor circuit

VVT sensor

P0341

P0346

While crankshaft rotates twice, camshaft position sensor

signal will be input to ECM 12 times or more (1 trip detec-

tion logic)

Hint:

Under normal condition, the camshaft position signal is

input into the ECM 3 times per 2 engine revolutions

VVT sensor

Camshaft

Jumping teeth of timing belt

ECM

DICEZ–02

A23538

20 msec./DIV (idling)

2 V/DIV

Ground

VV1

VV2

NE

VV1, VV2 and NE Signal Waveforms

Ground

Ground

–

DIAGNOSTICS

ENGINE

DI–217

411

Reference: Inspection using the oscilloscope.
The correct waveform is as shown.

Tester Connection

Specified Condition

G2+ (E5–27) – G2– (E5–32)

C

t

f

i

h

NE+ (E5–25) – NE– (E5–24)

Correct waveform is as shown

MONITOR DESCRIPTION

If there are no signals from the camshaft position sensor even though the engine is turning, or if the rotation
of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sen-
sor.

MONITOR STRATEGY

P0340

VVT sensor (Bank 1) range check or rationality

R l t d DTC

P0341

VVT sensor (Bank 1) range check or rationality

Related DTCs

P0345

VVT sensor (Bank 2) range check or rationality

P0346

VVT sensor (Bank 2) range check or rationality

R

i d

/

t

Main sensors/components

VVT sensor

Required sensors/components

Related sensors/components

Crankshaft position sensor, Engine speed sensor

Frequency of operation

Continuous

Duration

5 sec.

MIL operation

P0340, P0345 case 1: 2 driving cycles

P0340, P0345 case 2, P0341, P0346: Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever these

DTCs are not present

See page 

DI–18

P0340, P0345 Case 1:

Starter

ON

Minimum battery voltage while starter ON

–

11 V

P0340, P0345 Case 2:

Engine RPM

600 rpm

–

Starter

OFF

Battery voltage

8 V

–

Ignition switch

ON

P0341, P0346:

Starter

After OFF to ON timing

Engine revolution

720



CA

DI–218

–

DIAGNOSTICS

ENGINE

412

TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria

Threshold

P0340, P0345 Case 1:

VVT sensor signal

No signal

P0340, P0345 Case 2:

VVT sensor signal

No signal

P0341, P0346:

VVT sensor count

12 or more / 720



CA (= Engine 2 revolutions)

COMPONENT OPERATING RANGE

Parameter

Standard Value

VVT sensor signal input during every 720



CA

3

WIRING DIAGRAM

Refer to DTC P0335 on page 

DI–210

.

INSPECTION PROCEDURE

HINT:
Read freeze frame data using 

the hand−held tester

. Freeze frame data records the engine conditions when

a malfunction is 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, as well as other
data from the time when a malfunction occurred.

1

Check resistance of camshaft position sensor (See page 

SF–76

).

NG

Repair or replace harness or connector.

OK