2001 TOYOTA SEQUOIA Page 18

± 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).

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

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

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).

DI±224
± DIAGNOSTICSENGINE
418 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR STRATEGY
P0351No. 1 ignition coil with igniter circuit malfunction
P0352No. 2 ignition coil with igniter circuit malfunction
P0353No. 3 ignition coil with igniter circuit malfunction
RltdDTCP0354No. 4 ignition coil with igniter circuit malfunctionRelated DTCsP0355No. 5 ignition coil with igniter circuit malfunction
P0356No. 6 ignition coil with igniter circuit malfunction
P0357No. 7 ignition coil with igniter circuit malfunction
P0358No. 8 ignition coil with igniter circuit malfunction
Required sensors/componentsIgniter
Frequency of operationContinuous
Duration0.256 sec. + 4 sparks
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not presentSee page DI±18
Engine speed±1,500 rpm
Either of the following conditions is met:Condition 1 or 2
1. Following conditions are met:Condition (a) and (b)
(a) Engine speed±500 rpm
(b) Battery voltage6 V±
2. Following conditions are met:Condition (a) and (b)
(a) Engine speed500 rpm±
(b) Battery voltage10 V±
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
ºIgnition signal fail countºMore than 2
ºIgnition signal fail countº is on the right:When IGF does not return despite sending IGT.
COMPONENT OPERATING RANGE
Standard Value
Confirmed signal number = ignition signal number

DI±226
± DIAGNOSTICSENGINE
420 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:

If DTCs P0351, P0354, P0356 and P0357 are output simultaneously, IGF1 circuit may be open or
short.

If DTCs P0352, P0353, P0355 and P0358 are output simultaneously, IGF2 circuit may be open or
short.

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 spark plug and spark (See page IG±1).
NG Go to step 4.
OK

B17411
IGF1 IGF2(+) (+)E8
E6
E1 (±)
DI±228
± DIAGNOSTICSENGINE
422 Author: Date:
2005 SEQUOIA (RM1146U)
3 Disconnect ignition coil with igniter connector, and check voltage between ter-
minals IGF1, IGF2 and E1 of ECM connector.
PREPARATION:
(a) Disconnect the I1, I2, I3, I4, I5, I6, I7 or I8 ignition coil with
igniter connector.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between the E8 and E6 ECM connectors.
OK:
Standard:
Tester ConnectionSpecified Condition
IGF1 (E8±24) ± E1 (E6±1)4.5 to 5.5 V
IGF2 (E8±25) ± E1 (E6±1)4.5 to 5.5 V
NG Replace ECM (See page SF±80).
OK
Replace ignition coil with igniter.

B17411E8
IGT8
IGT2IGT4
IGT5 IGT6IGT3
IGT7IGT1E1(+)(±) (+) (+)
(+)
(+)
(+)
(+)
(+)
E6
DI±230
± DIAGNOSTICSENGINE
424 Author: Date:
2005 SEQUOIA (RM1146U)
5 Check voltage between terminals IGT1 ± IGT8 and E1 of ECM connector.
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Measure the voltage between terminals the E8 and E6 ECM
connectors when the engine is cranked.
OK:
Standard:
Tester ConnectionSpecified Condition
IGT1 (E8±8) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
IGT2 (E8±15) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
IGT3 (E8±11) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
IGT4 (E8±10) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
IGT5 (E8±13) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
IGT6 (E8±12) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
IGT7 (E8±14) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
IGT8 (E8±9) ± E1 (E6±1)More than 0.1 V or less than 4.5 V
NG Replace ECM (See page SF±80).
OK