Page 1745 of 2572

- 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.
Page 1746 of 2572

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
Page 1747 of 2572
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)
Page 1748 of 2572

05-174
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
364 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0351 IGNITION COIL ºAº PRIMARY/SECONDARY
CIRCUIT
DTC P0352 IGNITION COIL ºBº PRIMARY/SECONDARY
CIRCUIT
DTC P0353 IGNITION COIL ºCº PRIMARY/SECONDARY
CIRCUIT
DTC P0354 IGNITION COIL ºDº 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.
CIRCUIT DESCRIPTION
A Direct Ignition System (DIS) is used on this vehicle.
The DIS is a 1-cylinder ignition system which ignites one cylinder with one ignition coil. In the 1-cylinder
ignition system, one spark plug is connected to the end of the secondary winding. High-voltage is generated
in the secondary winding and 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, which switches on and off current to
the primary coil. When 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 cur-
rent to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder ignition
to the ECM.
05EVG-05
Page 1749 of 2572
A90874
Crankshaft
Position
Sensor
Camshaft
Position
SensorIGT1
IGF1
IGT2
IGT3
IGT4 ECM
No. 1 Spark Plug
No. 2 Spark Plug
No. 3 Spark Plug
No. 4 Spark Plug IgniterFrom Battery
Ignition Coil
TA C
To Tachometer Other Sensors
ECT Sensor
MAF Meter
Throttle Position Sensor
OthersNo. 2 Ignition
Coil with Igniter
No. 3 Ignition
Coil with Igniter
No. 4 Ignition
Coil with IgniterNo. 1 Ignition
Coil with Igniter
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-175
365 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)DTC No.
DTC Detection ConditionTrouble Area
P0351
P0352
P0353
P0354
No IGF signal to ECM while engine is running
(1 trip detection logic)
Ignition system
Open or short in IGF1 and IGT circuits (1 throught 4) from
ignition coil assy to ECM
Ignition coil assy (No. 1 throught No. 4)
ECM
Page 1750 of 2572

A82388
ECM
Time IgniterIgnition Coil
Normal
Circuit Open Ignition Signal
(IGT)
Ignition
Confirmation
Signal (IGF)IGFIGT
Malfunction
Ignition Coil with Igniter
05-176
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
366 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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.
MONITOR STRATEGY
Related DTCs
P0351: Igniter (Cylinder 1) malfunction
P0352: Igniter (Cylinder 2) malfunction
P0353: Igniter (Cylinder 3) malfunction
P0354: Igniter (Cylinder 4) malfunction
Required sensors/ components (Main)Igniter
Required sensors / components (Related)CKP sensor
Frequency of operationContinuous
Duration0.256 sec. + 4 sparks
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not presentSee page 05-16
Either of the following condition is met:Condition 1 or 2
1. Engine RPM1,500 rpm or less
2. StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
IGF signalECM does not receive any IGF signal when ECM sends IGT signal to igniter
Page 1751 of 2572
A90300
8
IGF1 IGT1
E7
IGT4 R-W
GR IC3
I15
Ignition Switch
EFL-YE7
E7 1124
I5
Ignition Coil with
Igniter No. 43
2
1 4
42
2
2 3 4
4 R
R O
W-B
W-B
W-B W-B
1
N1
Noise Filter 1
Instrument
Panel J/B
Assy
AM2
IG2
1
1F7
FL Block AssyI2
Ignition Coil with
Igniter No. 1
E9 E11
A
A
EEBR
J7
J/C
BR W-B5 V
W-R
W-R
W-R
W
FL
Main
Battery 10L-Y IC1
AM2
Y
76 1C 41F 6
1G 1 IG2EB12
BRBR
1C 1ECM
IGT2 P
E79
13 W-BI3
Ignition Coil with
Igniter No. 2
IGT3 Y-B
E710
3 1 I4
Ignition Coil with
Igniter No. 3
W-B1W-R
W-R
W-R R R
R R RRW-R
S29 S284
4
Short
Connector
B
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-177
367 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
COMPONENT OPERATING RANGE
IGF signalIgniter outputs IGF signal when it receives IGT signal from ECM
WIRING DIAGRAM
Page 1752 of 2572

Y
A54393
A81699
A85848
Wire Harness Side
I2
I3
I4
I5
Ignition Coil
IGF1 E7
ECM
05-178
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
368 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
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.
1 CHECK SPARK PLUG AND SPARK OF MISFIRING CYLINDER (See page 18-3)
OK: Spark occurs.
NG Go to step 4
OK
2 CHECK WIRE HARNESS (IGNITION COIL ASSY - ECM (IGF TERMINAL))
(a) Disconnect the I2, I3, I4 and I5 ignition coil connectors.
(b) Disconnect the E7 ECM connector.
(c) Measure the resistance of the wire harness side connec-
tors.
Standard:
Tester ConnectionSpecified Condition
I2-2 - E7-24 (IGF1)
I3-2 - E7-24 (IGF1)
I4-2 - E7-24 (IGF1)
I5-2 - E7-24 (IGF1)
Below 1 W
I2-2 or E7-24 (IGF1) - Body ground
I3-2 or E7-24 (IGF1) - Body ground
I4-2 or E7-24 (IGF1) - Body ground
I5-2 or E7-24 (IGF1) - Body ground
10 kW or higher
NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK