2001 TOYOTA SEQUOIA O2 sensor

DI±296
± DIAGNOSTICSENGINE
490 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0604 Internal Control Module Random Access
Memory (RAM) Error
DTC P0606 ECM/PCM Processor
DTC P0607 Control Module Performance
DTC P0657 Actuator Supply Voltage Circuit / Open
MONITOR DESCRIPTION
The ECM continuously monitors its internal memory status, internal circuits, and output signals to the throttle
actuator. This self±check insures that the ECM is functioning properly. If any malfunction is detected, the
ECM will set the appropriate DTC and illuminate the MIL.
The ECM memory status is diagnosed by internal ºmirroringº of the main CPU and the sub CPU to detect
RAM (Random Access Memory) errors. The two CPUs also perform continuous mutual monitoring.
The ECM sets a DTC if: 1) outputs from the 2 CPUs are different and deviate from the standards, 2) the sig-
nals to the throttle actuator deviate from the standards, 3) a malfunction is found in the throttle actuator sup-
ply voltage, and 4) any other ECM malfunction is found.
DTC No.DTC Detecting ConditionTrouble Area
P0604
P0606
P0607
P0657
ECM malfunction
ECM
MONITOR STRATEGY
P0604Random access memory (RAM) error
RltdDTCP0606CPU malfunctionRelated DTCsP0607ECM range check
P0657ETCS power supply
Required sensors/componentsECM
Frequency of operationContinuous
DurationWithin 1 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these
DTCs are not presentSee page DI±18
The typical enabling condition is not avail-
able±
DI3IK±13

DI±298
± DIAGNOSTICSENGINE
492 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0617 Starter Relay Circuit High
MONITOR DESCRIPTION
While the engine is being cranked, the battery positive voltage is applied to terminal STA of the ECM.
If the vehicle is being driven and the ECM detects the starter control signal (STA), the ECM concludes that
the starter control circuit is malfunctioning. The ECM will turn on the MIL and a DTC is set.
DTC No.DTC Detection ConditionTrouble Area
P0617
When all conditions (a), (b) and (c) are satisfied for 20 seconds
with battery (+B) voltage 10.5 V or more
(a) Vehicle speed
20 km/h (12.4 mph)
(b) Engine revolution
1,000 rpm
(c) STA signal ON
Park/neutral position switch

Starter relay circuit

Ignition switch

ECM
MONITOR STRATEGY
Related DTCsP0617Starter signal error
Rid / tMain sensors/componentsStarter signalRequired sensors/componentsRelated sensors/componentsVehicle speed sensor, Engine speed sensor
Frequency of operationContinuous
Duration20 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not presentSee page DI±18
Battery voltage10.5 V±
Vehicle speed20 km/h (12.4 mph)±
Engine RPM1,000 rpm±
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
Starter signalON (at ºmore than 20 km/h (12.4 mph) and more than 1,000 rpmº)
DID8D±01

DI±302
± DIAGNOSTICSENGINE
496 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P0630 VIN not Programmed or Mismatch ECM/PCM
CIRCUIT DESCRIPTION
DTC P0630 is set when the Vehicle Identification Number (VIN) is not stored in the Engine Control Module
(ECM) or the input VIN is not accurate. Input the VIN with the hand±held tester.
DTC No.DTC Detecting ConditionTrouble Area
P0630
VIN is not stored in ECM.

Input VIN in ECM is not accurate.ECM
MONITOR STRATEGY
Related DTCsP0630VIN not programmed
Rid / tMain sensors/componentsECMRequired sensors/componentsRelated sensors/components±
Frequency of operationContinuous
Duration0.5 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever this DTC is
not presentSee page DI±18
Battery voltage8 V±
Ignition switchON
StarterOFF
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
VIN codeNot programmed
COMPONENT OPERATING RANGE
ParameterStandard Value
VIN codeProgrammed
DID8E±01

DI±304
± DIAGNOSTICSENGINE
498 Author: Date:
2005 SEQUOIA (RM1146U)
DTC P1340, P1341 Camshaft Position Sensor ºAº (Bank
Sensor 1)
CIRCUIT DESCRIPTION
Camshaft position sensor (G signal) consists of a magnet, iron core and pickup coil.
The camshaft drive gear (LH) has 3 teeth on its inner circumference. When the camshaft gear rotates, air
gap changes between the protrusion on the gear and the pickup coil. The change affects the magnetic field
and result in change in the resistance of the MRE element.
The crankshaft signal plate has 32 teeth and is mounted on the crankshaft. The crankshaft position sensor
generates 32 signals at every engine revolution. The ECM detects the standard crankshaft angle based on
the G signal and the actual crankshaft angle and the engine speed by the NE signal.
DTC No.DTC Detecting ConditionTrouble Area
P1340
No camshaft position sensor signal to ECM during cranking
(2 trip detection logic)
Open or short in camshaft position sensor circuit

Camshaft position sensor
P1340
P1341No camshaft position sensor signal to ECM with engine speed
600 rpm or more

Camshaft osition sensor

LH camshaft timing pulley

ECM
MONITOR DESCRIPTION
The camshaft position sensor (G signal) consists of a magnet and MRE element.
The camshaft drive gear has 5 teeth on its inner circumference. When the camshaft gear rotates, air gap
changes between the protrusion on the gear and the pickup coil. The change affects the magnetic field and
result in change in the resistance of the MRE element. The crankshaft angle sensor plate has 32 teeth and
output 32 signals every engine revolution. The ECM detects the standard crankshaft angle based on the
G signal and actual crankshaft angle and engine speed by NE signal.
MONITOR STRATEGY
RltdDTC
P1340Camshaft position sensor (Bank 1) range check
or rationality
Related DTCs
P1341Camshaft 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 operationP1340 case 1 (no signal): 2 driving cycles
P1340 case 2 (mis±aligned), P1341: Immediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever these
DTCs are not presentSee page DI±18
P1340 Case 1 (No signal):
StarterON
Minimum battery voltage while starter ON±11 V
DID8F±01

A23558
C2
Crankshaft Position Sensor
*1: Shielded C1
Crankshaft Position Sensor
ECM
G±B
(*1)
(*1)VC
E2
EC
BRJ42
J/C
D
DBR 2
Y
1
2L
G
RG2+
G2±
NE+
NE± 123
E8
19
E6
29
E6
21
E6
20
E6 E
EEJ42 J/C
± DIAGNOSTICSENGINE
DI±305
499 Author: Date:
2005 SEQUOIA (RM1146U) P1340 Case 2 (Mis±aligned):
Engine RPM600 rpm±
StarterOFF
P1341:
StarterAfter OFF to ON timing
TYPICAL MALFUNCTION THRESHOLDS
Detection CriteriaThreshold
P1340 Case 1 (No signal):
Camshaft position sensor signalNo signal
P1340 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.
P1341:
Crankshaft/Camshaft alignmentMis±aligned
Camshaft position sensor count12 or more / 720CA (= Engine 2 revolutions)
COMPONENT OPERATING RANGE
ParameterStandard Value
Camshaft position sensor signal input at every 720CA3
WIRING DIAGRAM

B17445
Wire Harness Side:
Camshaft Position Sensor
A23559
2 V / DIV
GND
Crank Angle
120°120° 180°
180°
60°60°
200 ms /DIV
B17414
E6ECM Connector
G2+
G2±
DI±306
± DIAGNOSTICSENGINE
500 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
HINT:
Read freeze frame data using hand±held tester. Because freeze frame records the engine conditions when
the malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was run-
ning or stopped, the engine was warmed up or not, the air±fuel ratio was lean or rich, etc. at the time of the
malfunction.
1 Check voltage of camshaft position sensor power source circuit.
PREPARATION:
(a) Disconnect the Camshaft position sensor connector.
(b) Turn the ignition switch to ON.
CHECK:
Measure the voltage between terminal 3 of the camshaft posi-
tion sensor connector and body ground.
OK:
Standard: 4.5 to 5.5 V
NG Repair or replace harness or connector.
OK
2 Check camshaft position sensor signal.
PREPARATION:
Start the engine.
CHECK:
Check the waveform between the G2+ (E6±19) and G2±
(E6±29) of the ECM connector.
OK:
Standard: Correct waveform is as shown.
OK Replace ECM (See page IN±35).
NG

B17414
E6ECM Connector
G2+
G2±
B17445
Wire Harness Side:
Camshaft Position Sensor C1
BR3795OK NGClearance
± DIAGNOSTICSENGINE
DI±307
501 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check for open and short in harness and connector between ECM and camshaft
position sensor.
PREPARATION:
(a) Disconnect the Camshaft position sensor connector.
(b) Disconnect the E6 ECM connector.
CHECK:
Measure the resistance between wire harness side connectors.
OK:
Standard:
Tester ConnectionSpecified Condition
Camshaft position sensor (C1±2) ±
G2+ (E6±19)Below 1 W
Camshaft position sensor (C1±1) ±
G2± (E6±29)Below 1 W
Camshaft position sensor (C1±2) or
G2+ (E6±19) ± Body ground10 kW or higher
Camshaft position sensor (C1±1) or
G2± (E6±29) ± Body ground10 kW or higher
NG Repair or replace harness or connector.
OK
4 Inspect sensor installation and signal plate tooth of LH camshaft timing pulley.
CHECK:
Check the camshaft position sensor installation.
OK:
The camshaft position sensor is installed properly.
NG Tighten sensor installation bolt.
OK

DI±308
± DIAGNOSTICSENGINE
502 Author: Date:
2005 SEQUOIA (RM1146U)
5 Inspect signal plate tooth of LH camshaft timing pulley.
NG Replace LH camshaft timing pulley.
OK
Replace camshaft position sensor.