2001 TOYOTA HIGHLANDER timing

05-190
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)(From August, 2004)
380 Author
: Date
:
DTC P043E EVAPORATIVE EMISSION SYSTEM
REFERENCE ORIFICE CLOG UP
DTC P043F EVAPORATIVE EMISSION SYSTEM
REFERENCE ORIFICE HIGH FLOW
CIRCUIT DESCRIPTION
Refer to EVAP Inspection Procedure (see page 05-317).
DTCsMonitoring ItemDetection ConditionTrouble AreaDetection
TimingDetection
Period
P043E0.02 inch orifice clogged
(built-in pump module)
To determine leak criterion (Reference
pressure), vacuum pump creates negative
pressure in canister pump module through
0.02 inch orifice and pressure is measured.
If one of following conditions is met, ECM
setspumpmodule related DTCs: P043E

Pump module

Connector / wire harness
Ignition2 trips
P043F0.02 inch orifice high-flow
(built-in pump module)
sets pump module related DTCs: P043E,
P043F, P2401, P2402 and P2419:

Reference pressure is -1 kPa or higher

Reference pressure is -4.85 kPa or lower

Reference pressure is not saturated within
60 secondsConnector / wire harness
(Pump module - ECM)

ECM
Ignition
OFF2 trips
WIRING DIAGRAM
Refer to EVAP Inspection Procedure (see page 05-317).
INSPECTION PROCEDURE
Refer to EVAP Inspection Procedure (see page 05-317).
05PGO-01

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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295 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
MONITOR DESCRIPTION
The ECM uses the throttle position sensor to monitor the throttle valve opening angle.
(a) There is a specific voltage difference between VTA1 and VTA2 for each throttle opening angle.

If the difference between VTA1 and VTA2 deviates from the specified range, the ECM interprets this
as a fault and will set a DTC.
(b) VTA1 and VTA2 have each specific voltage operating range.

If VTA1 or VTA2 is out of the normal operating range, the ECM interprets this as a fault and will set
a DTC.
(c) VTA1 and VTA2 should never be close to the same voltage levels.

If the difference between VTA1 and VTA2 is within 0.02 V, the ECM interprets this as a short circuit
in the throttle position sensor system and will set a DTC.
FAIL-SAFE
If the Electronic Throttle Control System (ETCS) has a malfunction, the ECM cuts off current to the throttle
control motor. The throttle control valve returns to a predetermined opening angle (approximately 16) by
the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (inter-
mittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the
vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a ºpassº condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop
and the system will return to normal condition.
MONITOR STRATEGY
Related DTCs
P0120: TP sensor 1 range check (Chattering)
P0122: TP sensor 1 range check (Low voltage)
P0123: TP sensor 1 range check (High voltage)
P0220: TP sensor 2 range check (Chattering)
P0222: TP sensor 2 range check (Low voltage)
P0223: TP sensor 2 range check (High voltage)
P2135: TP sensor range check (Correlation)
Required sensors/components (Main)TP (Throttle position) sensor
Required sensors/components (Related)-
Frequency of operationContinuous
Duration
Accelerator pedal ON: 2 seconds
Accelerator pedal OFF: 10 seconds
0.5 seconds or 0.4 seconds (P2135)
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not presentSee page 05-16
TYPICAL MALFUNCTION THRESHOLDS
P0120:
VTA1 voltage0.2 V or less or 4.8 V or more
P0122:
VTA1 voltage0.2 V or less
P0123:
VTA1 voltage4.8 V or more
P0220:
VTA2 voltage0.5 V or less or 4.8 V or more
P0222:

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-1 11
301 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0121 THROTTLE/PEDAL POSITION
SENSOR/SWITCH ºAº CIRCUIT
RANGE/PERFORMANCE PROBLEM
HINT:
This is the purpose of the ºthrottle position sensorº.
CIRCUIT DESCRIPTION
Refer to DTC P0120 on page 05-102.
DTC No.DTC Detection ConditionTrouble Area
P0121
Condition (a) continues for 2.0 seconds:
(a) Difference between VTA1 and VTA2 deviates from thresh-
old
Throttle position sensor
MONITOR DESCRIPTION
The ECM uses the throttle position sensor to monitor the throttle valve opening angle.
This sensor includes 2 signals: VTA1 and VTA2. VTA1 is used to detect the throttle opening angle and VTA2
is used to detect malfunctions in VTA1. There are several checks that the ECM performs to confirm proper
operation of the throttle position sensor and VTA1.
There is a specific voltage difference between VTA1 and VTA2 for each throttle opening angle.
If the voltage output difference between the VTA1 and VTA2 deviates from the normal operating range, the
ECM interprets this as a malfunction of the throttle position sensor. The ECM will turn on the MIL and will
set a DTC.
FAIL-SAFE
If the Electronic Throttle Control System (ETCS) has a malfunction, the ECM cuts off current to the throttle
control motor. The throttle control valve returns to a predetermined opening angle (approximately 16
) by
the force of the return spring. The ECM then adjusts the engine output by controlling the fuel injection (inter-
mittent fuel-cut) and ignition timing in accordance with the accelerator pedal opening angle to enable the
vehicle to continue at a minimal speed.
If the accelerator pedal is depressed firmly and slowly, the vehicle can be driven slowly.
If a ºpassº condition is detected and then the ignition switch is turned OFF, the fail-safe operation will stop
and the system will return to normal condition.
MONITOR STRATEGY
Related DTCsP0121: TP (Throttle position) sensor rationality
Required sensors / components (Main)TP sensor
Required sensors / components (Related)-
Frequency of operationContinuous
Duration2 sec.
MIL operationImmediate
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever this DTC is not presentSee page 05-16
052NE-53

A90871
Crankshaft Position Sensor
(36-2 teeth or 12 teeth)ECM
Camshaft Position Sensor
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)DTC No.
DTC Detection ConditionTrouble Area
P0300Misfiring of random cylinders is detected

Open or short in engine wire

Connector connection

Vacuum hose connection

Ignition system

Injector

Fuel pressure

MAF meter

ECT sensor

Compression pressure

Valve clearance

Valve timing

PCV hose connection

PCV hose

ECM
P0301
P0302
Misfiring of each cylinder is detected
Same as DTC No P0300P0302
P0303
P0304Misfiring of each cylinder is detected
Same as DTC No. P0300
HINT:
When several codes for a misfiring cylinder are recorded repeatedly but no random misfire code is recorded,
the misfires have been detected and recorded at different times.
MONITOR DESCRIPTION
The ECM illuminates the MIL (2 trip detection logic) if:

The misfiring rate exceeds a threshold value and could cause emission deterioration.

During the first 1,000 engine revolutions after the engine starts, an excessive misfire rate (approxi-
mately 20 to 50 misfires per 1,000 engine revolutions) occurs 1 time.

After the first 1,000 engine revolutions after the engine starts, an excessive misfire rate (approximately
20 to 50 misfires per 1,000 engine revolutions) occurs 4 times.
The ECM blinks the MIL (MIL blinks immediately) if:

Within 200 engine revolutions at a high rpm, the threshold for ºpercentage of misfire causing catalyst
damageº is reached 1 time.

Within 200 engine revolutions at a normal rpm, the threshold for ºpercentage of misfire causing catalyst
damageº is reached 3 times. (for the 2nd trip, reaching the threshold once will cause the MIL to flash)

05-158
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348 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
13 CHECK VALVE CLEARANCE OF MISFIRING CYLINDER (See page 14-6)
Standard (cold):
ItemSpecified Condition
Intake0.19 to 0.29 mm (0.0075 to 0.0114 in.)
Exhaust0.30 to 0.40 mm (0.0118 to 0.0157 in.)
NG ADJUST VALVE CLEARANCE
(See page 14-6)
OK
14 SWITCH STEP BY NUMBER OF MISFIRE CYLINDER (REFER TO RESULTS OF
STEP 4)
HINT:

If the result of step 4 is º1 or 2 cylindersº, proceed to A.

If the result of step 4 is ºmore than 3 cylindersº, proceed to B.
B CHECK FOR INTERMITTENT PROBLEMS
(See page 05-9)
A
15 CHECK VALVE TIMING (See page 14-68)
(a) Check for loose or jumped tooth of the timing chain.
OK: The matchmarks of the crankshaft pulley and camshaft pulley are alined.
NG ADJUST VALVE TIMING (See page 14-68)
OK
16 CHECK FUEL PRESSURE (See page 11-4)
Standard:
ItemSpecified Condition
Fuel pressure304 to 343 kPa (3.1 to 3.5 kgf/cm2, 44 to 55 psi)
NG CHECK AND REPLACE FUEL PUMP,
PRESSURE REGULATOR, FUEL PIPE LINE AND
FILTER
OK

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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351 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0325 KNOCK SENSOR 1 CIRCUIT (BANK 1 OR
SINGLE SENSOR)
DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT
(BANK 1 OR SINGLE SENSOR)
DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT
(BANK 1 OR SINGLE SENSOR)
CIRCUIT DESCRIPTION
A flat type knock sensor (non-resonant type) can detect vibrations in a wide band of frequency (about 6 kHz
to 15 kHz) and has the following features:

Knock sensors is fitted on the cylinder block to detect the engine knocking.

The sensor contains a piezoelectric element which generates a voltage when the cylinder block vi-
brates. If engine knocking occurs, the ignition timing is retarded to suppress it.
DTC No.DTC Detection ConditionTrouble Area
P0325Open or short in knock sensor circuit
(1 trip detection logic)
Open or short in knock sensor circuit

Knock sensor

ECM
P0327Output voltage of the knock sensor is 0.5 V or less
(1 trip detection logic)
Short in knock sensor circuit

Knock sensor

ECM
P0328Output voltage of the knock sensor is 4.5 V or more
(1 trip detection logic)
Open in knock sensor circuit

Knock sensor

ECM
HINT:
If the ECM detects the DTC P0325, it enters the fail-safe mode in which the corrective retarded angle value
is set to the maximum value.
MONITOR DESCRIPTION
The knock sensor, located on the cylinder block, detects spark knock. When a spark knock occurs, the sen-
sor vibrates in a specific frequency range. When the ECM detects the voltage in this frequency range, it re-
tards the ignition timing to suppress the spark knock.
The ECM also senses background engine noise with the knock sensor and uses this noise to check for faults
in the sensor. If the knock sensor signal level is too low for more than 10 seconds, and if the knock sensor
output voltage is out of normal range, the ECM interprets this as a fault in the knock sensor and sets a DTC.
05ESX-04

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356 Author
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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

05-170
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
360 Author
: Date
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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