2001 TOYOTA SEQUOIA Page 18

A21343
I9I10
I11I12
I13I14
I15I16
Wire Harness Side:
Injector Connector
A21378
I18
Wire Harness Side:
Ignition Switch Connector
IG2
DI±200
± DIAGNOSTICSENGINE
394 Author: Date:
2005 SEQUOIA (RM1146U)
PREPARATION:
(a) Disconnect the I9, I10, I11, I12, I13, I14, I15 or I16 injector
connector.
(b) Disconnect the I18 ignition switch connector.
CHECK:
Measure the resistance the wire harness side connectors be-
tween the injector and ignition switch.
OK:
Standard:
Tester ConnectionSpecified Condition
Injector (I9±1) ± IG2 (I18±6)Below 1 W
Injector (I10±1) ± IG2 (I18±6)Below 1 W
Injector (I11±1) ± IG2 (I18±6)Below 1 W
Injector (I12±1) ± IG2 (I18±6)Below 1 W
Injector (I13±1) ± IG2 (I18±6)Below 1 W
Injector (I14±1) ± IG2 (I18±6)Below 1 W
Injector (I15±1) ± IG2 (I18±6)Below 1 W
Injector (I16±1) ± IG2 (I18±6)Below 1 W
Injector (I9±1) or IG2 (I18±6) ±
Body ground10 kW or higher
Injector (I10±1) or IG2 (I18±6) ±
Body ground10 kW or higher
Injector (I11±1) or IG2 (I18±6) ±
Body ground10 kW or higher
Injector (I12±1) or IG2 (I18±6) ±
Body ground10 kW or higher
Injector (I13±1) or IG2 (I18±6) ±
Body ground10 kW or higher
Injector (I14±1) or IG2 (I18±6) ±
Body ground10 kW or higher
Injector (I15±1) or IG2 (I18±6) ±
Body ground10 kW or higher
Injector (I16±1) or IG2 (I18±6) ±
Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
11 Check injector injection of misfiring cylinder (See page SF±29).
NG Replace injector.
OK

± DIAGNOSTICSENGINE
DI±201
395 Author: Date:
2005 SEQUOIA (RM1146U)
12 Check compression pressure of misfiring cylinder (See page EM±3).
NG Repair or replace.
OK
13 Check valve clearance of misfiring cylinder (See page EM±4).
NG Adjust valve clearance.
OK
14 Switch step by number of misfire cylinder (Refer to the result of step 4).
High misfire rate cylinderProceed to
1 or 2 cylindersA
More than 3 cylindersB
B Check for intermittent problems
(See page DI±11).
A
15 Check valve timing (Check for looseness or a jumped tooth of timing belt)
(See page EM±9).
NG Adjust valve timing (Repair or replace timing
belt).
OK

DI±202
± DIAGNOSTICSENGINE
396 Author: Date:
2005 SEQUOIA (RM1146U)
16 Check fuel pressure (See page SF±7).
NG Check and repair fuel pump, pressure regulator,
fuel pipe line and filter (See page SF±1).
OK
17 Check intake air temperature and mass air flow rate.
PREPARATION:
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
CHECK:
Check the intake air temperature.
(1) When using hand±held tester, enter the following menu: DIAGNOSIS / ENHANCED OBD II /
DATA LIST / ALL / INTAKE AIR.
(2) Read its value displayed on the hand±held tester.
OK:
Equivalent to ambient temperature
CHECK:
Check the air flow rate.
(1) When using hand±held tester, enter the following menu: DIAGNOSIS/ENHANCED OBD II/DATA
LIST/ALL/MAF.
(2) Read its value displayed on the hand±held tester.
OK:
ConditionAir Flow Rate (gm/s)
Ignition switch ON (do not start engine)0
Idling4 to 6
Running without load (2,500 rpm)13 to 20
Idling to quickly acceleratingAir flow rate fluctuates
NG Replace mass air flow meter.
OK

S01196S01699
30
20
10
5
3
02040 0.11
0.3
0.2 0.52
60 80 100 ±20
(±4) (104) (140) (176)(32) (68) (212)
A21042
Ohmmeter
Acceptable
TEMPERATURE C (F)
RESISTANCE KW
± DIAGNOSTICSENGINE
DI±203
397 Author: Date:
2005 SEQUOIA (RM1146U)
18 Check engine coolant temperature sensor.
PREPARATION:
Remove the engine coolant temperature sensor.
CHECK:
Measure the resistance between the terminals of the engine
coolant temperature sensor.
Resistance:
Tester ConnectionSpecified Condition
1 ± 22.32 to 2.59 kW (20C (68F))
1 ± 20.310 to 0.326 kW (80C (176F))
NOTICE:
In case of checking the engine coolant temperature sensor
in the water, be careful not to allow water to go into the ter-
minals. After checking, dry the sensor.
HINT:
Alternate procedure: Connect an ohmmeter to the installed en-
gine coolant temperature sensor and read the resistance. Use
an infrared thermometer to measure the engine temperature in
the immediate vicinity of the sensor. Compare these values to
the resistance/temperature graph. Change the engine temper-
ature (by warming up or cooling down) and repeat the test.
NG Replace
engine coolant temperature sensor.
OK
19 Switch step by number of misfire cylinder (Refer to the result of step 4).
High misfire rate cylinderProceed to
1 or 2 cylindersA
More than 3 cylindersB
B Go to step 5.
A
Check for intermittent problems
(See page DI±11).

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.±

B17411
KNK1
KNK2EKN2
EKNK E7
DI±208
± DIAGNOSTICSENGINE
402 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check for open and short in harness and connector between EB4 connector and
ECM (See page IN±35).
NG Repair or replace harness or connector.
OK
3 Measure voltage between terminals KNK1 and EKNK, KNK2 and EKN2 of ECM.
PREPARATION:
(a) Disconnect the E7 ECM connector.
(b) Turn the ignition switch to ON.
CHECK:
(a) Measure the voltage between the specified ECM termi-
nals.
OK:
Standard:
Tester ConnectionSpecified Condition
KNK1 (E7±29) ± EKNK (E7±28)4.5 to 5.5 V
KNK2 (E7±21) ± EKN2 (E7±20)4.5 to 5.5 V
(b) Reconnect the ECM connector.
NG Replace ECM (See page SF±80).
OK
Check for intermittent problems
(See page DI±11).
4 Check knock sensor installation.
CHECK:
Check the knock sensor installation.
OK:
Torque: 20 NVm (204 kgfVcm, 15 ftVlbf)
NG Tighten the sensor.
OK

A23513
Male Connector
EB4
Wire Harness Side:
Front View
± DIAGNOSTICSENGINE
DI±209
403 Author: Date:
2005 SEQUOIA (RM1146U)
Replace knock sensor (See page SF±66).
5 Check knock sensor.
PREPARATION:
(a) Disconnect the EB4 connector.
CHECK:
(a) Check the resistance between the terminals of the EB4
male connector.
OK:
Standard:
Tester ConnectionSpecified Condition
EB4 male connector 3 ±4120 to 280 kW
EB4 male connector 7 ± 8120 to 280 kW
(b) Reconnect the EB4 connector.
OK Check for intermittent problems
(See page DI±11).
NG
6 Check for open and short in harness and connector between EB4 connector and
knock sensor (See page IN±35).
HINT:

If DTC P0327 or P0328 has changed to P0332 or P0333, check the knock sensor circuit on the right
bank side.

If DTC P0332 or P0333 has changed to P0327 or P0328, check the knock sensor circuit on the left
bank side.
NG Repair or replace harness or connector.
OK
Replace knock sensor.

± 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