2001 TOYOTA PRIUS engine knock sensor

2001 PRIUS (EWD414U)
G
Position of Parts in Engine Compartment
I 1 Ignition Coil and Igniter No.1
I 2 Ignition Coil and Igniter No.2
I 3 Ignition Coil and Igniter No.3
I 4 Ignition Coil and Igniter No.4
I 5 Injector No.1
I 6 Injector No.2
I 7 Injector No.3
I 8 Injector No.4
I 9 Inverter
I 10 Inverter
I 11 Inverter
I 12 Inverter
I 13 Inverter
I 14 Inverter
K 1 Knock Sensor
M 1 Mass Air Flow Meter
M 2 Motor Generator No.1
M 3 Motor Generator No.2
M 4 Motor Generator No.2N 1 Noise Filter (Ignition)
O 1 Oil Pressure SW
R 1 Radiator Fan Motor
S 1 Steering Shaft Torque Sensor
T 1 Theft Deterrent Horn
T 2 Throttle Control Motor
T 3 Throttle Position Sensor
V 1 Vacuum Sensor (HC Adsorber and Catalyst System)
V 2 VSV (EVAP)
V 3 VSV (HC Adsorber and Catalyst System)
W 1 Washer Motor
W 2 Water Pump Motor (A/C)
W 3 Water Pump Motor (Inverter)
W 4 Water Temp. SW

2001 PRIUS (EWD414U)
ENGINE CONTROL
2 1
2 1 I 7B 24 B16 A 10
EBA 21 A31
B A B A B AA A A A A AB 17
A AD 13 D 14 D 6 C 6C8 CE CE
CRANKSHAFT POSITION
SENSOR C 6 CAMSHAFT POSITION
SENSOR C 1
JUNCTION
CONNECTOR J16
GR GR±LG± R W± LP±B P±B
W±L R G GR
G G
BR
BR
BR (
*1)
(
*1)
BR
W± B
W± BBR BR
W±B
W±B G (
*1)(
*1)
(
*1)
(
*1) (
*1) (
*1)GR±LG± R W± LP±B
(
*1)
(
*1)
JUNCTION
CONNECTORB J 8 A , J 9
MPX2 MPX1 W SIL TC
E02 E01 E1 NE+ NE± G2ENGINE CONTROL MODULEB E 7 , E 8AE 9, C D, E10
A 28
EA1 1
1
B B KNOCK SENSOR K 1(
*1)
9A 3A
EA
W± B
W± BW±B
W±B
E03 ME01 FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
15A
THRO
1A 8
A 6
+BM
GR GR
D 225
P±G
ACT NEO
LG
4
3D A/C AMPLIFIER A 8
KNK1
I 7I 7I 7
(
*1) (
*1) (
*1) NE ACT

2001 PRIUS (EWD414U)
ENGINE CONTROL
This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. INPUT SIGNALS
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built±in thermistor with a resistance which
varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into
TERMINAL THW of the engine control module.
(2) Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a
control signal into TERMINAL THA of the engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINALS OX1A and OX1B of
the engine control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G2 of the engine control module, and engine RPM is input
into TERMINAL NE+.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINALS
VTA and VTA2 of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed signal from brake ECU, detects the vehicle speed and inputs a control signal into TERMINAL SPD of
the engine control module via the combination meter.
(7) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start±up power supply is applied to TERMINAL +B of the engine control module via
EFI relay.
(8) Engine knock signal circuit
Engine knocking is detected by knock sensor and the signal is input into TERMINAL KNK1 of the engine control module
as a control signal.
2. CONTROL SYSTEM
*SFI system
The SFI system monitors the engine condition through the signals, which are input from each sensor to the engine
control module. The best fuel injection volume is decided based on this data and the program memorized by the engine
control module, and the control signal is output to TERMINALS #10, #20, #30 and #40 of the engine control module to
operate the injector. (Inject the fuel). The SFI system produces control of fuel injection operation by the engine control
module in response to the driving conditions.
*ESA system
The ESA system monitors the engine condition through the signals, which are input to the engine control module from
each sensor. The best ignition timing is detected according to this data and the memorized data in the engine control
module, and the control signal is output to TERMINALS IGT1, IGT2, IGT3 and IGT4. This signal controls the ignition coil
and igniter to provide the best ignition timing for the driving conditions.
*Fuel pump control system
The engine control module operation outputs to TERMINAL FC and controls the CIR OPN relay. Thus controls the fuel
pump drive speed in response to conditions.
3. DIAGNOSIS SYSTEM
With the diagnosis system, when there is a malfunctioning in the engine control module signal system, the malfunction
system is recorded in the memory. The malfunctioning system can then be found by reading the display (Code) of the
malfunction indicator lamp.
4. FAIL±SAFE SYSTEM
When a malfunction occurs in any system, if there is a possibility of engine trouble being caused by continued control based
on the signals from that system, the fail±safe system either controls the system by using data (Standard values) recorded in
the engine control module memory or else stops the engine.
SYSTEM OUTLINE

L
CodePart Name Part NumberCodePart Name Part Number
2001 PRIUS (EWD414U) E10
Engine Control Module90980±11638
F 1Front Airbag Sensor LH90980±11856F 2Front Airbag Sensor RH90980±11 856
F 3Front Parking Light LH
F 4Front Parking Light RH90980±11162F 5Front Side Marker Light LH90980±11162
F 6Front Side Marker Light RH
F 7Front Turn Signal Light LH90980±11019F 8Front Turn Signal Light RH90980±11019
F 9Front Wiper Motor90980±11599
F10Fusible Link Block No.1
F11Fusible Link Block No.1±
F12Fusible Link Block No.1
F13Fusible Link Block No.190980±11775
F14Front Door Speaker LH90980±10935F15Front Door Speaker RH90980±10935
F16Fuel Pump and Fuel Sender90980±12164
F17Fusible Link Block No.290980±10916
F18Fusible Link Block No.290980±11775
G 1Gateway ECU90980±11911
H 1Headlight LH90980±11314H 2Headlight RH90980±11314
H 3Heated Oxygen Sensor (Bank 1 Sensor1)90980±11028
H 4Horn90980±10619
H 5Hydraulic Booster90980±10939
H 6Hydraulic Booster90980±10946
H 7Hazard Warning SW90980±11319
H 8Hazard Warning SW90980±11921
H 9Heated Oxygen Sensor (Bank 1 Sensor 2)90980±11028
H10Hybrid Vehicle Control ECU90980±11638
H11Hybrid Vehicle Control ECU90980±11637
H12Hybrid Vehicle Control ECU90980±11586
H13Hybrid Vehicle Control ECU90980±11476
H14Hybrid Vehicle Control ECU90980±11421
H15High Mounted Stop Light90980±11060
H16Hybrid Vehicle Battery±H17Hybrid Vehicle Battery±
I 1Ignition Coil and Igniter No.1
I 2Ignition Coil and Igniter No.290980±11885I 3Ignition Coil and Igniter No.390980±11885
I 4Ignition Coil and Igniter No.4
I 5Injector No.1
I 6Injector No.290980±11875I 7Injector No.390980±11 875
I 8Injector No.4
I 9Inverter90980±11034
I10Inverter90980±10891
I11Inverter90980±10988
I12Inverter90980±10897
I13Inverter90980±11943
I14Inverter90980±11944
I15Ignition SW90980±11615
I16Interior Light90980±10860
I17Interlock SW90980±11918
J 1Junction Connector90980±10976
J 2Junction Connector90980±11742J 3Junction Connector90980±11742
J 4Junction Connector90980±11661J 5Junction Connector90980±11661
J6
Junction Connector (w/ Daytime Running
Light)90980±11542
J 6Junction Connector (w/o Daytime Running
Light)90980±11529
J 7Junction Connector90980±10803
J 8Junction Connector90980±11661J 9Junction Connector90980±11661
J10Junction Connector90980±11398
J11Junction Connector90980±10976
J12Junction Connector
J13Junction Connector90980±11661J14Junction Connector90980±11661
J15Junction Connector
J16Junction Connector90980±11915
J17Junction Connector90980±10976
J18Junction Connector90980±11661J19Junction Connector90980±11661
J20Junction Connector90980±11915J21Junction Connector90980±11915
J22Junction Connector
J23Junction Connector90980±11661J24Junction Connector90980±11661
J25Junction Connector
J26Junction Connector
J27Junction Connector90980±11915
J28Junction Connector
J29Junction Connector90980±11396
J30Junction Connector
J31Junction Connector90980±11661J32Junction Connector90980±11661
J33Junction Connector
K 1Knock Sensor90980±11166
L 1Light Control Rheostat90980±10797

2001 PRIUS (EWD414U)
M
16 C 4A 5D 10C 18C 19C 28C 27C
From Hybr id Vehicle
Co nt r ol ECU< 1 ±9>
2 PRIUS (
Cont' d)
13
1416 153D 22D
See Air
Conditioning
System< 24±6>
1EA1
1
2 1
2 1 28 A 10 A 24 B 16 B
AA AA AA AA17 B 21 A 31 A 3 A 9 A
AB AB AB
D
E A
C
EB Engine block
EAEngine block11 ID2FA
HB
8ID1
8ID2
9ID1 10 ID2
(
*1)
(
*1)KNK1 G2 FAN SPD SPHV HTE±From FAN NO. 1 and
FAN NO. 2 Rel ay
< 22±3> To Combination Meter
< 23±2>
LG V± WO BRY
PL
R± Y
IDCowl si de
panel LH HTE+ ETH+ ETH±
NE± NE+ E1 E0 1 E0 2 E0 3 ME01
BBR G G R
G BR W±B W±B W±B W±B
BR W±B W±B W±B W±B
K 1
KNOCK SENSOR C 1
CAMSHAFT POSITION
SENSOR C 6
CRA NKS HAFT POSI TI ON
SENSORJUNCTION
CONNECTORB A J 8 J 9,
NEO ACT ESTP
(
*1)(
*1) (
*1)
R±G
B±W
B± WR±G
B± R B± W
R± G
B± W LG±BR± WL±B
W± B W± B
LG±BL±B
W±B
R± G
J11
JUNCTI ON
CONNECTOR T 4
TRANSPONDER
KEY COMPUTER
EB
AA
7B 8C
IF Left kick panel
RADI O A ND PL AYE RC B R 3 R 4,
C 7
CENTER CLUSTER
SW
I ND GND CTY KSWIG +BD HEVC
To Hybrid Vehic le
Control ECU< 1±20>To Door Court esy SW
Front LH< 10±2> To Unloc k Warning
SW< 9±2> < 15±3>
6A
A 4A
J27 J28,
JUNCTION
CONNECT ORAB
J10
JUNCTI ON
CONNECTOR
2138
51267LG±BBRBR
A
A
J20
J UNCTI ON
CONNE CTOR JUNCTI ON CONNECTORB A J27 J28,
* 1 : Shielded
Engine ControlHybrid Vehicle Immobiliser System
BB±R
E 7 E 8,
E NGI NE CONTROL MODULEAB
(
*1)
BR BR
(
*1) (
*1) R± G
E 9 , C E10, D
B±R
23 C
TAM
BR
(
*1) (
*1)B
B
L±BJ20
J UNCTI ON
CONNECTOR 21 C
GO
G
9IA2
G

ENGINE ± 1NZ-FXE ENGINE62
ENGINE CONTROL SYSTEM
1. General
The engine control system for the 1NZ-FXE engine has following system.
System
Outline
SFI
Sequential Multiport
Fuel InjectionAn L-type SFI system directly detects the intake air volume with a hot-wire
type mass air flow meter.
ESA
Electronic Spark
AdvanceIgnition timing is determined by the ECM based on signals from various
sensors. The ECM corrects ignition timing in response to engine knocking.
VVT-i
Variable Valve
Timing-intelligentControls the intake camshaft to an optimal valve timing in accordance with
the engine condition.
ETCS-i
Electronic
Throttle Control
System-intelligentOptimally controls the throttle valve opening in accordance with the ECM,
and the conditions of the engine and the vehicle, and comprehensively
controls the ISC and cruise control system.
Fuel Pump Control
Fuel pump operation is controlled by signal from the ECM.

To stop the fuel pump during operation of the SRS airbag.
Oxygen Sensor Heater
ControlMaintains the temperature of the oxygen sensors at an appropriate level to
increase accuracy of detection of the oxygen concentration in the exhaust gas.
Evaporative Emission
Control

The ECM controls the purge flow of evaporative emissions (HC) in the
charcoal canister in accordance with engine conditions.

Using 3 VSVs and a vapor pressure sensor, the ECM detects any
evaporative emission leakage occurring between the fuel tank and the
charcoal canister, and vapor reducing fuel tank through the changes in the
tank pressure. For details, see page 79.
Toyota HCAC System
The ECM controls the VSV (for Toyota HCAC System) to improve the clean
emission performance of the exhaust gas when the temperature of the TWC
is low. For details, see page 58.
Air Conditioning
Cut-Off ControlBy turning the air conditioning compressor OFF in accordance with the
engine condition, drivability is maintained.
Cooling Fan ControlRadiator cooling fan operation is controlled by signals from ECM based on
the engine coolant temperature sensor signal (THW).
HV Immobiliser
Prohibits fuel delivery, ignition, and starting the HV system if an attempt is
made to start the HV system with an invalid ignition key. For details, see page
80.
DiagnosisWhen the ECM detects a malfunction, the ECM diagnoses and memorizes
the failed section.
Fail-SafeWhen the ECM detects a malfunction, the ECM stops or controls the engine
according to the data already stored in memory.

ENGINE ± 1NZ-FXE ENGINE
No.4 INJECTOR
SPARK PLUGS
No.2 INJECTOR
No.1 INJECTOR
No.3 INJECTOR SENSORS ACTUATORS
SFI
#10
CRANKSHAFT POSITION
SENSORNE
CAMSHAFT POSITION
SENSORG2
THROTTLE POSITION SENSORVTA
VTA2
COMBINATION METER
SPD

Vehicle Speed Signal
HEATED OXYGEN SENSOR
(Bank 1, Sensor 1)OX1A
HEATED OXYGEN SENSOR
(Bank 1, Sensor 2)OX1B
AMBIENT TEMP. SENSORTA M
ESA
IGT1

IGT4
IGF
THROTTLE CONTROL
MOTORETCS-i
M
ECM
ENGINE COOLANT TEMP.
SENSORTHW
INTAKE AIR TEMP. SENSORTHA
MASS AIR FLOW METERVG
IGNITION SWITCHIGSW
KNOCK SENSORKNK1
OIL PRESSURE SWITCHMOPS
CAMSHAFT TIMING OIL
CONTROL VALVE OCV
VVT-i
Bank 1, Sensor 2
Bank 1, Sensor 1HT1A
HT1B
#20
#30
#40
OXYGEN SENSOR HEATER
CONTROL
HEATED OXYGEN SENSOR
HEATER
CIRCUIT OPENING RELAYFUEL PUMP CONTROLFC
IGNITION COIL
with IGNITER
63
2. Construction
The configuration of the engine control system in the INZ-FXE engine is shown in the following chart.
(Continued)

ENGINE ± 1NZ-FXE ENGINE
182EG22
Circuit
Opening
Relay
VSV
(for
EVAP)
Intake
Air Temp.
SensorThrottle
Position
Sensor
ECMHV
ECU
Accelera-
tor Pedal
Position
Sensor
Cooling
Fan Relay
Throttle
Control
Motor
Igniter
Camshaft Position Sensor
Knock
Sensor
Mass Air
Flow Meter
VSV
(for Toyota
HCAC
System)Vacuum
Sensor
(for Toyota
HCAC
System)
Crankshaft
Position Sensor Injector
Camshaft
Timing
Oil Con-
trol Valve
Engine
Coolant
Te m p .
Sensor
TWC
Heated Oxygen
Sensor (Bank 1,
Sensor 1)
Heated Oxygen
Sensor (Bank 1,
Sensor 2)
Actuator (for HC
Adsorber)
TWC (with HC
Adsorber)
VSV (for Purge Flow
Switching Valve)
Vapor Pressure Sensor
VSV (for Canister Closed Valve)
Charcoal
Canister
Fuel Pump65
3. Engine Control System Diagram