2001 TOYOTA SEQUOIA battery

A23648
GND 1V/ DIV KNK1 Signal Waveform
1 msec./ Division
± DIAGNOSTICSENGINE
DI±205
399 Author: Date:
2005 SEQUOIA (RM1146U)
Reference: Inspection using the oscilloscope.
The correct waveform is as shown.
ItemDetails
Terminal
KNK1 ± EKNK
or
KNK2 ± EKN2
Equipment Settings0.01 to 10 V/Division,
0.01 to 10 msec./Division
ConditionAfter warming up the engine,
keep the engine speed at 4,000 rpm.
MONITOR DESCRIPTION
The knock sensor located on the cylinder block detects spark knock.
When spark knock occurs, the sensor pick±up vibrates in a specific frequency range. When the ECM detects
the voltage in this frequency range, it retards the ignition timing to suppress the spark knock.
If there is a defect in the knock sensor or an open or short circuit, the voltage level will deviate outside the
normal operating range. The ECM interprets this deviation as a defect in the knock sensor and sets a DTC.
Example:
When the knock sensor voltage output is less than 0.5 V, or more than 4.5 V, and if either the condition contin-
ues for more than 3 sec.
MONITOR STRATEGY
P0325Knock sensor (Bank 1) range check (Chattering)
P0327Knock sensor (Bank 1) range check (Low volt-
age)
RltdDTC
P0328Knock sensor (Bank 1) range check (High volt-
age)
Related DTCsP0330Knock sensor (Bank 2) range check (Chattering)
P0327Knock sensor (Bank 2) range check (Low volt-
age)
P0328Knock sensor (Bank 2) range check (High volt-
age)
Main sensors/componentsKnock sensor
Required sensors/componentsRelated sensors/components
Crankshaft position sensor, Camshaft position
sensor, Engine coolant temperature sensor,
Mass air flow meter
Frequency of operationContinuous
Duration1 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not presentSee page DI±18
Battery voltage10.5 V±
Time after engine start5 sec.±

± 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

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

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.

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

A15470A19381
I8 Ignition Coil with Igniter No. 8
B±W
BR23
Ignition Coil with Igniter No. 7 I7
4
1
B±R
B±RECM
24
E8IGF1
IGF2
IGT8 E8
25
12E8
IGT7 9
E8
IGT6
11E8
15 E8 IGT5
E8
8IGT4
IGT3
E814
IGT2 13
E8
E8 10
IGT1
I18 Ignition SW
W±R IG2
AM25 1C2
1C3 IGN2 Instrument Panel J/B
2
1D
7 B±R 5
IG4 B±R
W±R
Engine Room J/B
2C 1
2DAM2 1
2
B
BatteryF10
Fusible Link Block4 1 2
N1 Noise Filter No. 1
B±R
1 3B±R4
BR
EC
2
I1 Ignition Coil with Igniter No. 1
B±R
I2 Ignition Coil with Igniter No. 2
1 3
4 2
B±W
BRB±R
I3 Ignition Coil with Igniter No. 3
BRBR
B±R B±R
B±R
B±R
B±R
B±R B±RB±R
3B±R1
4 2
B±W
I4 Ignition Coil with Igniter No. 4
413
2
I5 Ignition Coil with Igniter No. 5B±W
I6 Ignition Coil with Igniter No. 6
1 3
2
4
13
2
41 4 23
BR
B±W
G±R
P±L
G±W
R±W
G±B
LG±B
B±L
B±R
LG
BR
BR
BR
1J
BR
B±R
B±R
B±R
B±R
6
B±R BR
BR BRBRBR BR BR B±R
B±R
B±R
B
± DIAGNOSTICSENGINE
DI±225
419 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

± DIAGNOSTICSENGINE
DI±235
429 Author: Date:
2005 SEQUOIA (RM1146U)
MONITOR DESCRIPTION
The air injection driver (AID) detects an open or short in the circuit according to the voltage of the air pump
terminal (VP) and electromagnetic air switching valve terminal (VV), and sends a signal as diagnostic in-
formation to the ECM.
The AID outputs the air switching valve terminal malfunction signal to the ECM if: 1) VV terminal voltage is
low despite the AID receiving the command signal from the ECM to drive the air switching valve terminal or
2) VV terminal voltage is high despite the AID not receiving the command signal from the ECM.
The ECM stores the DTC based on the diagnostic signal from the AID and illuminates the MIL.
MONITOR STRATEGY
Related DTCsP0412Air switching valve circuit malfunction (Second-
ary air injection system)
Required sensors/componentsAir injection driver, Air switching valve
Frequency of operationContinuous
Duration3 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not presentSee page DI±18
Case 1:
Air pumpOperating
Air switching valveOperating
Battery voltage8 V±
Ignition switchON
StarterOFF
Case 2:
Air pumpNot operating
Air switching valveNot operating
Battery voltage8 V±
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
Case 1, 2:
Diagnostic signal duty ratio from air injection driver31 to 48 %
COMPONENT OPERATING RANGE
ParameterStandard Value
Diagnostic signal duty ratio from air injection driver
70 to 90% when secondary air injection system operating
and
0% when secondary air injection system not operating

A23551
Engine Room J/BECM
E4
E4
E4
E4 B±W
IA4
IA4
IA4
IA4
IA4
EB4 ED2
ED2B±W
2H
2A68
EFI Relay
2 1
2F
1 W±B
J5
J/C A
ED
Battery Air Pump Air Switching Valve Air Injection Driver
A43 A46A415
G±RG±R
J2
J/C
A
A EFI No.2 EFI No.1
3 52
2D1
B
4F10
FL Block
5B L
A401
EN B B
B 1
12
2 W
W±L W±L
W
34 2
6 A40
A41A41
A41
A41
A411 2 43
1
8
EBW±BW±B W±B
BATT
VP
VV
E SIP
DI SIV+B
R±W
R±W 8
3
9 G±W G±W
GR±L GR±L4
25
13
AIDAIRPAIRV
A/PUMP
2MREL DI±236
± DIAGNOSTICSENGINE
430 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM