check engine TOYOTA SEQUOIA 2001 Service Repair Manual

± DIAGNOSTICSENGINE
DI±211
405 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DESCRIPTION
If there are no signals from the crankshaft sensor even though the engine is revolving, the ECM interprets
this as a malfunction of the sensor.
MONITOR STRATEGY
Related DTCsP0335Crankshaft position sensor range check or ratio-
nality
Rid / tMain sensors/componentsCrankshaft position sensorRequired sensors/componentsRelated sensors/componentsEngine speed sensor
Frequency of operationContinuous
DurationCase 1: 0.016 sec.
Case 2: 3 times
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not presentSee page DI±18
Case 1:
Engine speed450 rpm±
StarterOFF
Time after starter ON to OFF3 sec.±
Case 2:
Time after starter ON to OFF0.3 sec.±
Number of camshaft position sensor sig-
nal pulse3±
Battery voltage7 V±
Ignition switchON
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
Case 1:
Engine speed signalNo signal for 0.016 sec.
Case 2:
Number of crankshaft position sensor signal pulse44 or less, or 58 or more

A21026
Component Side
C2
Crankshaft Position Sensor
± DIAGNOSTICSENGINE
DI±213
407 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:

Read freeze frame data using the hand±held tester. Freeze frame records the engine conditions when
a malfunction is detected. When troubleshooting it is useful for determining whether the vehicle was
running or stopped. the engine was warmed up or not, the air±fuel ratio lean or rich, etc. at the time
of the malfunction.

READ VALUE ON HAND±HELD TESTER
(a) Connect the hand±held tester to the DLC3.
(b) Start the engine and push the hand±held tester tool main switch ON.
(c) When using hand±held tester, enter the following menu: ºDIAGNOSIS / ENHANCED OBD II / DATA
LIST / ALL / ENGINE SPDº.

The engine speed can be confirmed in DATA LIST using the hand±held tester. If there are no NE sig-
nals from the crankshaft position sensor despite the engine revolving, the engine speed will be indi-
cated as zero. If voltage output of the crankshaft position sensor is insufficient, the engine speed will
be indicated as lower RPM (than the actual RPM).
1 Check resistance of crankshaft position sensor.
PREPARATION:
Disconnect the C2 crankshaft position sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2.
OK:
Standard:
Tester ConnectionSpecified Condition
1 ± 2985 to 1,600 W at cold
1 ± 21,265 to 1,890 W at hot
NOTICE:
º Coldº and ºHotº shown above mean the temperature of
the coils themselves. ºColdº is form ±10°C (14°F) to 50°C
(122°F) and ºHotº is from 50°C (122°F) to 100°C (212°F).
NG Replace crankshaft position sensor.
OK

A21027
Wire Harness Side
Crankshaft Position Sensor C2
B17414
E6ECM Connector
NE± NE+
BR3795OK NGClearance
DI±214
± DIAGNOSTICSENGINE
408 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short in harness and connector between ECM and
crankshaft position sensor.
PREPARATION:
(a) Disconnect the C2 crankshaft position sensor connector.
(b) Disconnect the E6 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Standard:
Tester ConnectionSpecified Condition
Crankshaft position sensor (C2±1) ±
NE+ (E6±21)Below 1 W
Crankshaft position sensor (C2±2) ±
NE± (E6±20)Below 1 W
Crankshaft position sensor (C2±1) or
NE+ (E6±21) ± Body ground10 kW or higher
Crankshaft position sensor (C2±2) or
NE± (E6±20) ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
3 Check sensor installation (crankshaft position sensor).
CHECK:
Check the crankshaft position sensor installation.
OK:
The crankshaft position sensor is installed properly.
NG Tighten sensor installation bolt.
OK

± 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

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

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).

± 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

A03401
IGT Signal Waveform
IGT
GND
IGF
20 msec./Division GND
A20793
Normal Ignition signal
(IGT)
Ignition
confirmation
signal (IGF)Malfunction
Circuit Open ECM
IGFIGT
IgniterIgnition Coil
Time Ignition Coil with Igniter
± DIAGNOSTICSENGINE
DI±223
417 Author: Date:
2005 SEQUOIA (RM1146U)DTC No.
DTC Detecting ConditionTrouble Area
P0351
P0352
P0353
P0354
P0355
P0356
P0357
P0358
No IGF signal to ECM while engine is running

Open or short in IGF1 or IGF2 and IGT1 to IGT8 circuit from
ignition coil with igniter to ECM

No. 1 to No. 8 ignition coil with igniter (primary ignition)

Ignition system

ECM
Reference: Inspection using the oscilloscope.
During cranking or idling, check the waveform between termi-
nals IG1 to IG8 and E1, and IGF1, IGF2 and E1 of the E6 and
E8 ECM connectors.
MONITOR DESCRIPTION
If the ECM does not receive the IGF after sending the IGT it interprets this as a fault in the igniter and sets
a DTC.