Page 409 of 4323
± DIAGNOSTICSENGINE
DI±215
409 Author: Date:
2005 SEQUOIA (RM1146U)
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).
Page 410 of 4323

DI±216
± DIAGNOSTICSENGINE
410 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0340 Camshaft Position Sensor ºAº Circuit
(Bank 1 or Single Sensor)
DTC P0341
Camshaft Position Sensor ºAº Circuit Range/Per-
formance (Bank 1 or Single Sensor)
DTC P0345 Camshaft Position Sensor ºAº Circuit
(Bank 2)
DTC P0346 Camshaft Position Sensor ºAº 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 ConditionTrouble Area
P0340
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)
P0340
P0345No 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 revolutionsVVT sensor
Camshaft
Jumping teeth of timing belt
ECM
DICEZ±02
Page 411 of 4323

A23538
20 msec./DIV (idling) 2 V/DIV
Ground VV1
VV2
NE VV1, VV2 and NE Signal Waveforms
Ground
Ground
± DIAGNOSTICSENGINE
DI±217
411 Author: Date:
2005 SEQUOIA (RM1146U)
Reference: Inspection using the oscilloscope.
The correct waveform is as shown.
Tester ConnectionSpecified Condition
G2+ (E5±27) ± G2± (E5±32)Ct fi hNE+ (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
P0340VVT sensor (Bank 1) range check or rationality
RltdDTCP0341VVT sensor (Bank 1) range check or rationalityRelated DTCsP0345VVT sensor (Bank 2) range check or rationality
P0346VVT sensor (Bank 2) range check or rationality
Rid / tMain sensors/componentsVVT sensorRequired sensors/componentsRelated sensors/componentsCrankshaft position sensor, Engine speed sensor
Frequency of operationContinuous
Duration5 sec.
MIL operationP0340, P0345 case 1: 2 driving cycles
P0340, P0345 case 2, P0341, P0346: Immediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not presentSee page DI±18
P0340, P0345 Case 1:
StarterON
Minimum battery voltage while starter ON±11 V
P0340, P0345 Case 2:
Engine RPM600 rpm±
StarterOFF
Battery voltage8 V±
Ignition switchON
P0341, P0346:
StarterAfter OFF to ON timing
Engine revolution720CA
Page 412 of 4323
DI±218
± DIAGNOSTICSENGINE
412 Author: Date:
2005 SEQUOIA (RM1146U)
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
P0340, P0345 Case 1:
VVT sensor signalNo signal
P0340, P0345 Case 2:
VVT sensor signalNo signal
P0341, P0346:
VVT sensor count12 or more / 720CA (= Engine 2 revolutions)
COMPONENT OPERATING RANGE
ParameterStandard Value
VVT sensor signal input during every 720CA3
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
Page 413 of 4323

B17414
E6
ECM Connector
VV2+
VV1±
VV1+VV2±
A21029
Wire Harness Side
VVT Sensor V16
V17
BR3795OK NGClearance
± DIAGNOSTICSENGINE
DI±219
413 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short in harness and connector between ECM and VVT sen-
sor.
PREPARATION:
(a) Disconnect the VVT sensor connector.
(b) Disconnect the E6 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester ConnectionSpecified Condition
VVT sensor (V16±1) ± VV1+ (E6±25)Below 1 W
VVT sensor (V16±2) ± VV1± (E6±24)Below 1 W
VVT sensor (V17±1) ± VV2+ (E6±18)Below 1 W
VVT sensor (V17±2) ± VV2± (E6±28)Below 1 W
VVT sensor (V16 ±1) or
VV1+ (E6±25) ± Body ground10 kW or higher
VVT sensor (V16±2) or
VV1± (E6±24) ± Body ground10 kW or higher
VVT sensor (V17 ±1) or
VV2+ (E6±18) ± Body ground10 kW or higher
VVT sensor (V17±2) or
VV2± (E6±28) ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
3 Check sensor installation (VVT position sensor).
CHECK:
Check the VVT position sensor installation.
OK:
The VVT sensor is installed properly.
NG Tighten sensor installation bolt.
OK
Page 414 of 4323
DI±220
± DIAGNOSTICSENGINE
414 Author: Date:
2005 SEQUOIA (RM1146U)
4 Inspect teeth of camshaft.
PREPARATION:
Remove the cylinder head cover (See page EM±29).
CHECK:
Check the camshaft.
NG Replace camshaft.
OK
Replace Camshaft position sensor
(See page IG±7).
Page 415 of 4323

± DIAGNOSTICSENGINE
DI±221
415 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0351 Igniter Coil ºAº Primary/Secondary Circuit
DTC P0352 Igniter Coil ºBº Primary/Secondary Circuit
DTC P0353 Igniter Coil ºCº Primary/Secondary Circuit
DTC P0354 Igniter Coil ºDº Primary/Secondary Circuit
DTC P0355 Igniter Coil ºEº Primary/Secondary Circuit
DTC P0356 Igniter Coil ºFº Primary/Secondary Circuit
DTC P0357 Igniter Coil ºGº Primary/Secondary Circuit
DTC P0358 Igniter Coil ºHº Primary/Secondary Circuit
HINT:
These DTCs indicate a malfunction related to primary circuit.
If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.
If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.
If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.
If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.
If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.
If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.
If DTC P0357 is displayed, check No. 7 ignition coil with igniter circuit.
If DTC P0358 is displayed, check No. 8 ignition coil with igniter circuit.
DICF0±02
Page 416 of 4323

A21429
ECM
No.1 Ignition Coil with Igniter
No. 2 Ignition
Coil with Igniter Crankshaft
Position
Sensor
Camshaft
Position
Sensor
Other Sensors:
No. 3 Ignition
Coil with Igniter
No. 4 Ignition
Coil with Igniter
No. 5 Ignition
Coil with Igniter
No. 6 Ignition
Coil with Igniter
No. 7 Ignition
Coil with Igniter
No. 8 Ignition
Coil with Igniter
TA C
To TachometerFrom Battery
Igniter
Ignition CoilSpark Plug
No. 1 Cylinder
No. 4 Cylinder
No. 5 Cylinder
No. 6 Cylinder No. 2 Cylinder
No. 3 Cylinder
No. 7 Cylinder
No. 8 Cylinder IGT1
IGF1
IGT2
IGF2
IGT3
IGT4
IGT5
IGT6
IGT7
IGT8 (Engine Coolant Temp.
Sensor, Mass Air Flow
Sensor, Throttle Position
Sensor, etc.)
DI±222
± DIAGNOSTICSENGINE
416 Author: Date:
2005 SEQUOIA (RM1146U)
CIRCUIT DESCRIPTION
These DTCs indicate a malfunction related to primary circuit.
The DIS is a 1±cylinder ignition system which ignites one cylinder with one ignition coil. In the 1±cylinder
ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated
in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the
center electrode to the ground electrode.
The ECM determines the ignition timing and outputs the ignition signals (IGTs) for each cylinder. Using the
IGT, the ECM turns on and off the power transistor inside the igniter and this switches on and off the current
to the primary coil. When the current to the primary coil is cut off, high±voltage is generated in the secondary
coil and this voltage is applied to the spark plugs to create sparks inside the cylinders. As the ECM cuts the
current to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder igni-
tion to the ECM.