Sfi System (For Sedan) Terminals Of Ecm

Engine Hybrid System. Yaris. Ncp93, 131
1Nz-Fe Engine Control. Yaris. Ncp93, 131

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Sfi System (For Sedan) -- Terminals Of Ecm



Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm

HINT:
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Symbol (Terminal No.)
Wiring Color
Terminal Description
Condition
Specified Condition
BATT (A21-20) - E1 (C20-104)
Y - W
Battery (for measuring battery voltage and for ECM memory)
Always
11 to 14 V
+BM (A21-3) - ME01 (C20-43)
GR - BR
Power source of throttle actuator
Always
11 to 14 V
IGSW (A21-28) - E1 (C20-104)
R - W
Ignition switch
Ignition switch ON
11 to 14 V
+B (A21-2) - E1 (C20-104)
B - W
Power source of ECM
Ignition switch ON
11 to 14 V
+B2 (A21-1) - E1 (C20-104)
B - W
Power source of ECM
Ignition switch ON
11 to 14 V
OC1+ (C20-100) - OC1- (C20-123)
BR - R
Camshaft timing oil control valve (OCV)
Idling
Pulse generation (See waveform 1)
MREL (A21-44) - E1 (C20-104)
GR - W
EFI relay
Ignition switch ON
11 to 14 V
VG (C20-118) - E2G (C20-116)
GR - LG
Mass air flow meter
Idling, Transmission gear neutral, A/C switch OFF
0.5 to 3.0 V
THA (C20-65) - ETHA (C20-88)
P - BE
Intake air temperature sensor
Idling, Intake air temperature 20°C (68°F)
0.5 to 3.4 V
THW (C20-97) - ETHW (C20-96)
L - P
Engine coolant temperature sensor
Idling, Engine coolant temperature 80°C (176°F)
0.2 to 1.0 V
VCTA (C20-67) - ETA (C20-91)
W - V
Power source of throttle position sensor (specific voltage)
Ignition switch ON
4.5 to 5.5 V
VTA1 (C20-115) - ETA (C20-91)
Y - V
Throttle position sensor (for engine control)
Ignition switch ON,
Throttle valve fully closed
0.5 to 1.1 V
Ignition switch ON,
Throttle valve fully open
3.2 to 4.8 V
VTA2 (C20-114) - ETA (C20-91)
GR - V
Throttle position sensor (for sensor malfunction detection)
Ignition switch ON,
Throttle valve fully closed
2.1 to 3.1 V
Ignition switch ON,
Throttle valve fully open
4.6 to 5.0 V
VPA (A21-55) - EPA (A21-59)
R - G
Accelerator pedal position sensor (for engine control)
Ignition switch ON,
Accelerator pedal released
0.5 to 1.1 V
Ignition switch ON,
Accelerator pedal fully depressed
2.6 to 4.5 V
VPA2 (A21-56) - EPA2 (A21-60)
L - BR
Accelerator pedal position sensor (for sensor malfunctioning detection)
Ignition switch ON,
Accelerator pedal released
1.2 to 2.0 V
Ignition switch ON,
Accelerator pedal fully depressed
3.4 to 4.7 V
VCPA (A21-57) - EPA (A21-59)
B - G
Power source of accelerator pedal position sensor (for VPA)
Ignition switch ON
4.5 to 5.5 V
VCP2 (A21-58) - EPA2 (A21-60)
W - BR
Power source of accelerator pedal position sensor (for VPA2)
Ignition switch ON
4.5 to 5.5 V
HA1A (C20-109) - E04 (C20-46)
G - W-B
A/F sensor heater
Idling with warm engine
Pulse generation (See waveform 2)
Ignition switch ON
11 to 14 V
A1A+ (C20-112) - E1 (C20-104)
V -W
A/F sensor
Ignition switch ON
3.3 V*
A1A- (C20-113) - E1 (C20-104)
LG - W
A/F sensor
Ignition switch ON
2.9 V*
HT1B (C20-47) - E03 (C20-86)
LG - W-B
Heated oxygen sensor heater
Idling
Below 3.0 V
Ignition switch ON
11 to 14 V
OX1B (C20-64) - EX1B (C20-87)
G - GR
Heated oxygen sensor
Engine speed maintained at 2500 rpm for 2 minutes after warming up sensor
Pulse generation (See waveform 3)
#10 (C20-108) - E01 (C20-45)
#20 (C20-107) - E01 (C20-45)
#30 (C20-106) - E01 (C20-45)
#40 (C20-105) - E01 (C20-45)
SB - BR
GR - BR
P - BR
L - BR
Fuel injector
Ignition switch ON
11 to 14 V
Idling
Pulse generation (See waveform 4)
KNK1 (C20-110) - EKNK (C20-111)
R - G
Knock sensor
Engine speed maintained at 4000 after warming up engine
Pulse generation (See waveform 5)
G2+ (C20-99) - NE- (C20-121)
B - P
Camshaft position sensor
Idling
Pulse generation (See waveform 6)
NE+ (C20-122) - NE- (C20-121)
L - P
Crankshaft position sensor
Idling
Pulse generation (See waveform 6)
IGT1 (C20-85) - E1 (C20-104)
IGT2 (C20-84) - E1 (C20-104)
IGT3 (C20-83) - E1 (C20-104)
IGT4 (C20-82) - E1 (C20-104)
W - W
BE - W
G - W
LG - W
Ignition coil (ignition signal)
Idling
Pulse generation (See waveform 7)
IGF1 (C20-81) - E1 (C20-104)
Y - W
Ignition coil (ignition confirmation signal)
Ignition switch ON
4.5 to 5.5 V
Idling
Pulse generation (See waveform 7)
PRG (C20-49) - E01 (C20-45)
L - BR
Purge VSV
Ignition switch ON
11 to 14 V
Idling, during purge control
Pulse generation (See waveform 8)
SPD (A21-8) - E1 (C20-104)
V - W
Speed signal from combination meter
Driving at 20 km/h (12 mph)
Pulse generation (See waveform 9)
STA (A21-48) - E1 (C20-104)
BR - W
Starter signal
Cranking
11 to 14 V
STAR (C20-52) - E1 (C20-104)
BE - W
Starter relay control
Ignition switch ON, Shift position P or N (for A/T), Clutch pedal fully depressed (for M/T)
Below 1.5 V
Cranking
6.0 V or more
ACCR (A21-13) - E01 (C20-45)
G - BR
ACC (Accessory) Cut relay control signal
Cranking
Below 1.5 V
STSW (A21-14) - E1 (C20-104)
B - W
Ignition switch signal
Ignition switch START position
6.0 V or more
STP (A21-36) - E1 (C20-104)
G - W
Stop light switch
Brake pedal depressed
7.5 to 14 V
Brake pedal released
Below 1.5 V
ST1- (A21-35) - E1 (C20-104)
Y - W
Stop light switch
(opposite to STP terminal)
Ignition switch ON,
Brake pedal depressed
Below 1.5 V
Ignition switch ON,
Brake pedal released
7.5 to 14 V
M+ (C20-42) - ME01 (C20-43)
G - BR
Throttle actuator
Idling with warm engine
Pulse generation (See waveform 10)
M- (C20-41) - ME01 (C20-43)
R - BR
Throttle actuator
Idling with warm engine
Pulse generation (See waveform 11)
FC (A21-7) - E01 (C20-45)
V - BR
Fuel pump control
Ignition switch ON
11 to 14 V
Idling
Below 1.5 V
W (A21-24) - E1 (C20-104)
B - W
MIL
Ignition switch ON (MIL goes on)
Below 1.5 V
Idling (MIL goes off)
11 to 14 V
TC (A21-27) - E1 (C20-104)
P - W
Terminal TC of DLC 3
Ignition switch ON
11 to 14 V
TACH (A21-15) - E1 (C20-104)
LG - W
Engine speed
Idling
Pulse generation (See waveform 12)
VPMP (A21-42) - E1 (C20-104)
P - W
Vent valve (built into canister pump module)
Ignition switch ON
11 to 14 V
MPMP (A21-34) - E1 (C20-104)
V - W
Leak detection pump (built into canister pump module)
Leak detection pump OFF
Below 3 V
Leak detection pump ON
11 to 14 V
VCPP (C20-70) - EPPM (C20-94)
V - BE
Power source for canister pressure sensor (specific voltage)
Ignition switch ON
4.5 to 5.5 V
PPMP (C20-71) - EPPM (C20-94)
L - BE
Canister pressure sensor (built into canister pump module)
Ignition switch ON
3 to 3.6 V
ELS (A21-31) - E1 (C20-104)
G - W
Electric load
Tail light switch ON
7.5 to 14 V
Tail light switch OFF
Below 1.5 V
ELS3 (A21-33) - E1 (C20-104)
V - W
Electric load
Defogger switch ON
7.5 to 14 V
Defogger switch OFF
Below 1.5 V
FAN (A21-21) - E1 (C20-104)
BE - W
Fan No. 1 relay
Ignition switch ON
11 to 14 V
Idling with A/C ON, or high engine coolant temperature
Below 1.5 V
FAN2 (A21-22) - E1 (C20-104)
LG - W
Fan No. 2 relay
Idling with high engine coolant temperature
Below 1.5 V
ALT (C20-50) - E1 (C20-104)
P - W
Generator
Ignition switch ON
11 to 14 V
CANH (A21-41) - E1 (C20-104)
L - W
CAN communication line
Ignition switch ON
Pulse generation (See waveform 13)
CANL (A21-49) - E1 (C20-104)
W - W
CAN communication line
Ignition switch ON
Pulse generation (See waveform 14)
HINT:
*: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

WAVEFORM 1
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Camshaft timing oil control valve (OCV)
ECM Terminal Names
Between OC1+ and OC1-
Tester Ranges
5 V/DIV, 1 msec./DIV
Conditions
Idling

WAVEFORM 2
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Air-fuel ratio sensor heater
ECM Terminal Names
Between HA1A and E04
Tester Ranges
5 V/DIV, 10 msec./DIV
Conditions
Idling with warm engine
HINT:
The wavelength varies in accordance with the engine operating condition.

WAVEFORM 3
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Heated oxygen sensor
ECM Terminal Names
Between OX1B and EX1B
Tester Ranges
0.2 V/DIV, 200 msec./DIV
Conditions
Engine speed maintained at 2500 rpm for 2 minutes after warming up sensor
HINT:
In DATA LIST, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.

WAVEFORM 4
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Fuel injector No. 1 (to No. 4) injection signal
ECM Terminal Names
Between #10 (to #40) and E01
Tester Ranges
20 V/DIV, 20 msec./DIV
Conditions
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 5
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Knock sensor
ECM Terminal Names
Between KNK1 and EKNK
Tester Ranges
1 V/DIV, 1 msec./DIV
Conditions
Engine speed maintained at 4000 rpm after warming up engine
HINT:
  1. The waveforms and amplitudes displayed differ slightly depending on the vehicle.

WAVEFORM 6
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Crankshaft position sensor and Camshaft position sensor
ECM Terminal Names
CH1: Between G2+ and NE-
CH2: Between NE+ and NE-
Tester Ranges
5 V/DIV, 20 msec./DIV
Conditions
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 7
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Igniter IGT signal (from ECM to igniter) and Igniter IGF signal (from igniter to ECM)
ECM Terminal Names
Between IGT (1 to 4) and E1
Between IGF1 and E1
Tester Ranges
2 V/DIV, 20 msec./DIV
Conditions
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 8
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Purge VSV
ECM Terminal Names
Between PRG and E01
Tester Ranges
10 V/DIV, 20 msec./DIV
Conditions
Idling, during purge control
HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

WAVEFORM 9
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Vehicle speed signal
ECM Terminal Names
Between SPD and E1
Tester Ranges
2 to 5 V/DIV, 20 msec./DIV
Conditions
Driving at 20 km/h (12 mph)
HINT:
The wavelength becomes shorter as the vehicle speed increases.

WAVEFORM 10
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Throttle actuator positive terminal
ECM Terminal Names
Between M+ and ME01
Tester Ranges
5 V/DIV, 1 msec./DIV
Conditions
Idling with warm engine
HINT:
The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 11
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Throttle actuator negative terminal
ECM Terminal Names
Between M- and ME01
Tester Ranges
5 V/DIV, 1 msec./DIV
Conditions
Idling with warm engine
HINT:
The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 12
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Engine speed signal
ECM Terminal Names
Between TACH and E1
Tester Ranges
5 V/DIV, 10 msec./DIV
Conditions
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 13
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Reference: CAN communication signal
ECM Terminal Names
Between CANH and E1
Tester Ranges
1 V/DIV, 10 μsec./DIV.
Conditions
Engine stops and ignition switch ON
HINT:
The waveform varies depending on the CAN communication signal.

WAVEFORM 14
Yaris. Ncp93, 131.1Nz-Fe Engine Control.Sfi System (For Sedan).Sfi System (For Sedan) Terminals Of Ecm
Reference: CAN communication signal
ECM Terminal Names
Between CANL and E1
Tester Ranges
1 V/DIV, 10 μsec./DIV.
Conditions
Engine stops and ignition switch ON
HINT:
The waveform varies depending on the CAN communication signal.