o2 sensor TOYOTA HIGHLANDER 2001 Service Repair Manual

A81695
KNK1
E8
ECMFKNK1
A81695
KNK1
E8
ECMFKNK1
A85286
GND 1 V / DIV KNK1 Signal Waveform
1 msec./ Division
05-164
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
354 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 CHECK WIRE HARNESS (ECM - KNOCK SENSOR)
(a) Disconnect the E8 ECM connector.
(b) Measure the resistance of the wire harness side connec-
tor.
Standard:
Tester ConnectionConditionSpecified Condition
E8-1 (KNK1) - E8-28 (FKNK1)20C (68F)120 to 280 kW
NG Go to step 5
OK
4 INSPECT ECM (KNK1 VOLTAGE)
(a) Disconnect the E8 ECM connector.
(b) Turn the ignition switch ON.
(c) Measure the voltage of the ECM terminals.
Voltage:
Tester ConnectionSpecified Condition
E8-1 (KNK1) - E8-28 (FKNK1)4.5 to 5.5 V
HINT:
Reference: Inspection using an oscilloscope.
After warming up, run the engine at 4,000 rpm. Check the wave-
form between terminal KNK1 and FKNK1 of the ECM connec-
tor.
Standard:
Tester ConnectionSpecified Condition
E8-1 (KNK1) - E8-28 (FKNK1)Correct waveform is as shown
NG REPLACE ECM (See Page 10-9)
OK
CHECK FOR INTERMITTENT PROBLEMS
NOTICE:
Fault may be intermittent. Check the harness and connectors carefully.

A65174
Ohmmeter
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-165
355 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 INSPECT KNOCK SENSOR
(a) Remove the knock sensor.
(b) Measure the resistance between the terminals.
OK: Resistance is 120 to 280 kW at 20C (68F)
NG REPLACE KNOCK SENSOR
OK
REPAIR OR REPLACE HARNESS AND CONNECTOR

05-166
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
356 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0335 CRANKSHAFT POSITION SENSOR ºAº
CIRCUIT
DTC P0339 CRANKSHAFT POSITION SENSOR ºAº
CIRCUIT INTERMITTENT
CIRCUIT DESCRIPTION
The crankshaft position sensor (CKP) system consists of a crankshaft position sensor plate and a pickup
coil.
The sensor plate has 34 teeth and is installed on the crankshaft. The pickup coil is made of an iron core and
magnet. The sensor plate rotates and as each tooth passes through the pickup coil, a pulse signal is gener-
ated. The pickup coil generates 34 signals for each engine revolution. Based on these signals, the ECM
calculates the crankshaft position and engine RPM. Using these calculations, the fuel injection time and igni-
tion timing are controlled.
DTC No.DTC Detection ConditionTrouble Area
P0335

No crankshaft position sensor signal to ECM during cranking
(2 trip detection logic)

No crankshaft position sensor signal to ECM with engine
speed 600 rpm or more (2 trip detection logic)
Open or short in crankshaft position sensor circuit

Crankshaft position sensor

Signal plate (Crankshaft position sensor plate No. 1)

ECM
P0339
No crankshaft position sensor signal is input to ECM for 0.05
seconds or more, and conditions (a), (b) and (c) are met:
(a) Engine is at 1,000 rpm or more
(b) STA signal is OFF
(c) 3 seconds or more have elapsed after STA signal is
switched from ON to OFF

Same as DTC No. P0355
MONITOR DESCRIPTION
If there is no signal from the crankshaft sensor even though the engine is cranking, the ECM interprets this
as a malfunction of the sensor.
MONITOR STRATEGY
Related DTCsP0335: CKP sensor range check during cranking
P0335: CKP sensor range check during engine running
Required sensors/ components (Main)CKP (Crankshaft position) sensor
Required sensors / components (Related)-
Frequency of operationContinuous
Duration4.7 sec.: CKP Sensor Range Check during Cranking
0.5 sec.: CKP Sensor Range Check during Engine Running
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not presentSee page 05-16
CKP Sensor Range Check during Cranking P0335:
StarterON
Minimum battery voltage while starter is ONLess than 11 V
CKP Sensor Range Check during Engine Running P0335:
Engine RPM600 rpm or more
StarterOFF
Time after starter turns from ON to OFF3 sec. or more
05ESY-05

A90299
C1
Camshaft Position Sensor
C7
Crankshaft Position SensorShieldedL Y
1
2 2 1
EEBR G
J7
J/C
AECM
G2+
NE+
NE-
E1 A AG R
BRE9
E9
E9 25
24
1 E9 27 Shielded
Crankshaft Angle
Sensor PlateSignal Rotor on
Intake Camshaft
A
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-167
357 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TYPICAL MALFUNCTION THRESHOLDS
CKP signalNo signal
COMPONENT OPERATING RANGE
CKP signalCKP sensor voltage fluctuates when the crankshaft rotates 34 CKP signals per 1
revolution crankshaft
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

Read values on the hand-held tester or OBD II scan tool.
(a) Connect the hand-held tester or the OBD II scan tool to the DLC3.
(b) Start the engine and push the hand-held tester or the OBD II scan tool main switch ON.
(c) Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / ENGINE SPD.

The engine speed can be confirmed in DATA LIST using the hand-held tester or OBD II scan tool. If
there are no NE signals from the crankshaft position sensor despite the engine revolving, the engine
speed will be indicated as zero. If voltage output of the crankshaft position sensor is insufficient, the
engine speed will be indicated as lower than the actual rpm.

Read freeze frame data using the hand-held tester or the OBD II scan tool. 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, and other data from the time the malfunction occurred.

A64984
A81699
A76903
A87927
NE- NE+ E9
ECM
G2+ and NE+ Signal Waveforms
2 V/
Division
20 msec./Division (Idling) G2+
NE+G2+
05-168
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
358 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1 INSPECT CRANKSHAFT POSITION SENSOR (RESISTANCE)
(a) Disconnect the C7 sensor connector.
(b) Measure the resistance between the terminals of the sen-
sor.
Standard:
Tester ConnectionConditionSpecified Condition
1 - 2Cold985 to 1,600 W
1 - 2Hot1,265 to 1,890 W
NOTICE:
In the above section, the terms ºcoldº and ºhotº refer to the
temperature of the coils. ºColdº means approximately
-10C to 50C (14F to 122F). ºHotº means approximately
50C to 100C (122F to 212F).
HINT:
Reference: Inspection using an oscilloscope.
During cranking or idling, check the waveform between the ter-
minals of the ECM connector.
Standard:
Tester ConnectionSpecified Condition
E9-27 (G2+) - E9-24 (NE-)
E9-25 (NE+) - E9-24 (NE-)Correct waveform is as shown
NG REPLACE CRANKSHAFT POSITION SENSOR
(See page 18-6)
OK

Y
A54385
A81699A85533
Wire Harness Side
C7
Crankshaft Position Sensor
NE- NE+
E9
ECM
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-169
359 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK WIRE HARNESS (CRANKSHAFT POSITION SENSOR - ECM)
(a) Disconnect the C7 sensor connector.
(b) Disconnect the E9 ECM connector.
(c) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified
Condition
C7-1 - E9-25 (NE+)
C7-2 - E9-24 (NE-)Below 1 W
C7-1 or E9-25 (NE+) - Body ground
C7-2 or E9-24 (NE-) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)
(a) Check the crankshaft position sensor installation.
OK: Sensor is installed correctly.
NG TIGHTEN SENSOR
OK
4 INSPECT CRANKSHAFT POSITION SENSOR PLATE NO.1 (TEETH OF SIGNAL
PLATE)
(a) Remove the crankshaft position sensor plate No. 1 (see page 14-41).
(b) Check the teeth of the signal plate.
OK: The pulley does not have any cracks or deformation.
NG REPLACE CRANKSHAFT POSITION SENSOR
PLATE NO.1
OK
REPLACE ECM (See page 10-9)

05-170
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
360 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0340 CAMSHAFT POSITION SENSOR ºAº
CIRCUIT (BANK 1 OR SINGLE SENSOR)
DTC P0341 CAMSHAFT POSITION SENSOR ºAº
CIRCUIT RANGE/PERFORMANCE (BANK 1
OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
The Camshaft Position (CMP) sensor, like the Crankshaft Position (CKP) sensor, consists of a magnet and
an iron core wrapped in copper wire. The camshaft has 3 teeth and the CMP sensor is installed so that it
can detect these teeth passing by. When the camshaft rotates and the teeth pass by the CMP sensor, the
magnet on the CMP sensor creates a magnetic field and voltage is generated in the copper wire. When the
crankshaft makes two rotation, voltage will be generated in the CMP sensor 3 times. The CKP sensor is
roughly the same. When the crankshaft makes one rotation, its 34 teeth pass by the CKP sensor and voltage
is generated 34 times. The camshaft rotates at half the speed of the crankshaft. Therefore, the CMP sensor
generates voltage 3 times in the time the crankshaft takes to make 2 rotations.
The ECM detects generation of these voltages to locate the camshaft position, which are used to indicate
the cylinder.
DTC No.DTC Detection ConditionTrouble Area
P0340

No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)

No 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

Camshaft position sensor

Timing chain has a jumped tooth

ECM
P0341While crankshaft rotates twice, camshaft position sensor signal
is input to ECM 12 times or more (1 trip detection logic)
Same as DTC No. P0340
HINT:

DTC P0340 indicates a malfunction related to the camshaft position sensor (+) circuit
(Wire harness (ECM - camshaft position sensor) and camshaft position sensor).

DTC P0341 indicates a malfunction related to the camshaft position sensor (-) circuit
(Wire harness (ECM - camshaft position sensor) and camshaft position sensor).
MONITOR DESCRIPTION
If there is no signal from the camshaft position sensor even though the engine is cranking, or if the rotations
of the camshaft and the crankshaft are not synchronized, the ECM interprets this as a malfunction of the
sensor.
MONITOR STRATEGY
Related DTCs
P0340: CMP sensor range check
P0340: CMP/CKP misalignment
P0341: CMP sensor malfunction
Required sensors/ components (Main)CMP (Camshaft position) sensor and VVT sensor
Required sensors / components (Related)CKP sensor
Frequency of operationContinuous
Duration5 sec.
MIL operation
2 driving cycles: CMP sensor range check
Immediate: CMP/CKP misalignment and CMP malfunction
CMP sensor malfunction
Sequence of operationNone
05EVD-05

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-171
361 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not presentSee page 05-16
CMP Sensor Range Check P0340:
StarterON
Minimal battery voltage while starter is ONLess than 11 V
CMP/CKP Misalignment and CMP Sensor Malfunction P0340:
Engine RPM600 rpm or more
StarterOFF
CMP Sensor Malfunction P0341:
StarterAfter OFF to ON timing
TYPICAL MALFUNCTION THRESHOLDS
CMP Sensor Range Check P0340:
CMP signalNo signal
CMP/CKP Misalignment P0340:
CMP and CKP phaseMisaligned
CMP Sensor Malfunction P0341:
CMP and CKP phaseMisaligned
CMP signal per 2 revolutions of crankshaft12 CMP signals or more
COMPONENT OPERATING RANGE
CMP sensor signalCMP sensor voltage fluctuates when the camshaft rotates
3 CMP signals per 2 revolutions of crankshaft
WIRING DIAGRAM
Refer to DTC P0335 on page 05-166.
INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand-held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was lean
or rich, and other data from the time the malfunction occurred.

A64984
A81699
A76903
A87927
NE- NE+ E9
ECM
G2+ and NE+ Signal Waveforms
2 V/
Division
20 msec./Division (Idling) G2+
NE+G2+
05-172
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
362 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
1 INSPECT CAMSHAFT POSITION SENSOR (RESISTANCE)
(a) Disconnect the C1 sensor connector.
(b) Measure the resistance between the terminals of the sen-
sor.
Standard:
Tester ConnectionConditionSpecified Condition
1 - 2Cold835 to 1,400 W
1 - 2Hot1,060 to 1,645 W
NOTICE:
In the above section, the terms ºcoldº and ºhotº refer to the
temperature of the coils. ºColdº means approximately
-10C to 50C (14F to 122F). ºHotº means approximately
50C to 100C (122F to 212F).
HINT:
Reference: Inspection using an oscilloscope.
During cranking or idling, check the waveform between the ter-
minals of the ECM connector.
Standard:
Tester ConnectionSpecified Condition
E9-27 (G2+) - E9-24 (NE-)
E9-25 (NE+) - E9-24 (NE-)Correct waveform is as shown
NG REPLACE CAMSHAFT POSITION SENSOR
(See page 18-5)
OK

Y
A54385
A81699A85533
Wire Harness Side
C1
Camshaft Position Sensor
NE-
G2+
E9
ECM
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-173
363 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 CHECK WIRE HARNESS (CAMSHAFT POSITION SENSOR - ECM)
(a) Disconnect the C1 sensor connector.
(b) Disconnect the E9 ECM connector.
(c) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified Condition
C1-1 - E9-27 (G2+)
C1-2 - E9-24 (NE-)Below 1 W
C1-1 or E9-27 (G2+) - Body ground
C1-2 or E9-24 (NE-) - Body ground10 kW or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
3 CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)
(a) Check the sensor installation.
OK: Sensor is installed correctly.
NG TIGHTEN SENSOR
OK
4 INSPECT CAMSHAFT
(a) Remove the camshafts (see page 14-79).
(b) Check the camshaft lobes.
OK: The camshaft lobes do not have any cracks or deformation.
NG REPLACE CAMSHAFT
OK
REPLACE ECM (See page 10-9)