Page 1246 of 3115
FI7059
FI7060A00069
G2 and NE Signal Waveforms
20 msec./Division (Idling)
10 msec./Division (Idling)5 V
/Division
G2
NE
5 V
/Division
G2
NE
- DIAGNOSTICSENGINE
DI-197
390 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P0340 Camshaft Position Sensor ºAº Circuit
(Bank 1 or Single Sensor)
DTC P0341 Camshaft Position Sensor ºAº Circuit
Range/Performance (Single Sensor)
CIRCUIT DESCRIPTION
The camshaft position sensor (G signal) consists of a magnet iron core and pickup coil.
The G signal plate has 1 tooth on its outer circumference and is installed on the LH camshaft timing pulley.
When the camshafts rotate, protrusion on the signal plate and air gap on the pickup coil change, causing
fluctuations in the magnetic field and generating a voltage in the pickup coil.
The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34
signals at every engine revolution. The ECM detects the crankshaft angle and the engine revolution based
on the NE signals, and the cylinder and the angle of the G2 based on the combination of the G and NE sig-
nals.
DTC No.DTC Detection ConditionTrouble Area
P0340
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)
P0340No 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
Camshaftposition sensor
P0341
While crankshaft rotates twice, camshaft position sensor
signal will be input to ECM 12 times or more (1 trip detec-
tion logic)
Hint:
Under normal condition, the camshaft position signal is
input into the ECM 3 times per 2 engine revolutionsCamshaft position sensor
LH camshaft timing pulley
Jumping teeth of timing belt
ECM
Reference: Inspection using the oscilloscope.
The correct waveform is as shown.
Tester ConnectionSpecified Condition
G2+ (E7-27) - G2- (E7-32)Ct fi hNE+ (E7-25) - NE- (E7-24)Correct waveform is as shown
DIC2E-01
Page 1247 of 3115
DI-198
- DIAGNOSTICSENGINE
391 Author: Date:
2004 LAND CRUISER (RM1071U)
MONITOR DESCRIPTION
If there is no signal 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
RltdDTC
P0340Camshaft position sensor (Bank 1) range check
or rationality
Related DTCs
P0341Camshaft position sensor (Bank 1) range check
or rationality
Rid / tMain sensors/componentsCamshaft position sensorRequired sensors/componentsRelated sensors/componentsCrankshaft position sensor, Engine speed sensor
Frequency of operationContinuous
Duration5 sec.
MIL operationP0340 case 1 (no signal): 2 driving cycles
P0340 case 2 (mis-aligned), P0341: Immediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not presentSee ºList of disable a monitorº (on page DI-3)
P0340 Case 1 (No signal):
StarterON
Minimum battery voltage while starter ON-11 V
P0340 Case 2 (Mis-aligned):
Engine speed600 rpm-
StarterOFF
P0341:
StarterAfter OFF to ON timing
Engine revolution720CA
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
P0340 Case 1 (No signal):
Camshaft position sensor signalNo signal
P0340 Case 2 (Mis-aligned):
Crankshaft/camshaft alignment is mis-aligned (judged by comparing the crankshaft position to the camshaft position)
Camshaft position sensor signal: No input in appropriate timing.
P0341:
Crankshaft/Camshaft alignmentMis-aligned
Camshaft position sensor count12 or more / 720CA (= Engine 2 revolutions)
Page 1248 of 3115
A21026
Component Side
Camshaft Position Sensor C1
- DIAGNOSTICSENGINE
DI-199
392 Author: Date:
2004 LAND CRUISER (RM1071U)
COMPONENT OPERATING RANGE
ParameterStandard Value
Camshaft position sensor signal input during every 720CA3
WIRING DIAGRAM
Refer to DTC P0335 on page DI-191.
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, as well as other data from the time when a malfunction occurred.
1 Check resistance of camshaft position sensor.
PREPARATION:
Disconnect the C1 camshaft position sensor connector.
CHECK:
Measure the resistance between terminals 1 and 2.
OK:
Tester ConnectionSpecified Condition
121,630 to 2,740 W at cold1 - 22,065 to 3,225 W at hot
NOTICE:
º Coldº and ºHotº shown above mean the temperature of
the coils themselves. ºColdº is from -10°C (14°F) to 50°C
(122°F) and ºHotº is from 50°C (122°F) to 100°C (212°F).
NG Replace camshaft position sensor.
OK
Page 1249 of 3115
A21029
Wire Harness Side
Camshaft Position Sensor C1
A21028
E7
ECM ConnectorG2+
G2-
DI-200
- DIAGNOSTICSENGINE
393 Author: Date:
2004 LAND CRUISER (RM1071U)
2 Check for open and short in harness and connector between ECM and camshaft
position sensor.
PREPARATION:
(a) Disconnect the C1 camshaft position sensor connector.
(b) Disconnect the E7 ECM connector.
CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:
Tester ConnectionSpecified Condition
Camshaft position sensor (C1-1) -
G2+ (E7-27)Below 1 W
Camshaft position sensor (C1-2) -
G2- (E7-32)Below 1 W
Camshaft position sensor (C1-1) or
G2+ (E7-27) - Body ground10 kW or higher
Camshaft position sensor (C1-2) or
G2- (E7-32) - Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
3 Check sensor installation (Camshaft position sensor).
CHECK:
Check the camshaft position sensor installation.
NG Tighten sensor.
OK
Page 1252 of 3115
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.)
- DIAGNOSTICSENGINE
DI-203
396 Author: Date:
2004 LAND CRUISER (RM1071U)
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 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.
Page 1254 of 3115
- DIAGNOSTICSENGINE
DI-205
398 Author: Date:
2004 LAND CRUISER (RM1071U)
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.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not presentSee ºList of disable a monitorº (on page DI-3)
Engine speed-1,500 rpm
Either of the following conditions is met:A or B
A. Following conditions are met:(a) and (b)
(a) Engine speed-500 rpm
(b) Battery voltage6 V-
B. Following conditions are met:(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 as follows:When IGF should have returned despite sending IGT.
COMPONENT OPERATING RANGE
Standard Value
Confirmed signal number = ignition signal number
Page 1264 of 3115
A20596
Normal Catalyst
Abnormal Catalyst Waveform of
Heated Oxygen Sensor
(before Catalyst) Waveform of
Heated Oxygen Sensor
(before Catalyst)
Waveform of
Heated Oxygen Sensor
(after Catalyst) Waveform of
Heated Oxygen Sensor
(after Catalyst)
- DIAGNOSTICSENGINE
DI-215
408 Author: Date:
DTC P0420 Catalyst System Efficiency Below Threshold
(Bank 1)
DTC P0430 Catalyst System Efficiency Below Threshold
(Bank 2)
MONITOR DESCRIPTION
The vehicle is equipped with two heated oxygen sensors. One is mounted upstream from the TWC (Three-
Way Catalytic) converter (Front Oxygen Sensor, ºsensor 1º), the second is mounted downstream (Rear Oxy-
gen Sensor ºsensor 2º). The catalyst efficiency monitor compares the sensor 1 and sensor 2 signals in order
to calculate TWC ability to store the oxygen.
During normal operation, the TWC stores and releases oxygen as needed. This results in low oxygen varia-
tions in the post TWC exhaust stream as shown below.
DIC2G-01
Page 1265 of 3115
A20598
Signal Length
Heated Oxygen Sensor Signal Length
Sensor Output
Voltage
Time DI-216
- DIAGNOSTICSENGINE
409 Author: Date:
DTC No.DTC Detecting ConditionTrouble Area
P0420
P0430
After engine and catalyst are warmed up, and while vehicle is
driven within set vehicle and engine speed range, waveform of
heated oxygen sensors have same amplitude
(2 trip detection logic)Gas leakage on exhaust system
Heated oxygen sensor (bank 1, 2 sensor 1, 2)
Three-way catalytic converter
HINT:
Bank 1 refers to the bank that includes cylinder No.1.
Bank 2 refers to the bank that does not include cylinder No.1.
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
MONITOR STRATEGY
RltdDTCP0420Bank 1 catalyst is deterioratedRelated DTCsP0430Bank 2 catalyst is deteriorated
Main sensors/componentsFront and rear heated oxygen sensor
Required sensors/componentsRelated sensors/components
Mass air flow meter, Engine coolant temperature
sensor, Engine speed sensor, Intake air tempera-
ture sensor
Frequency of operationOnce per driving cycle
Duration90 sec.
MIL operation2 driving cycles
Sequence of operationNone
