Toyota Venza manuals

Toyota Venza: Terminals Of Ecm

TERMINALS OF ECM


HINT:

The standard 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 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.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A49-20 (BATT) - B58-104 (E1)

V - BR

Battery (for measuring battery voltage and for ECM memory)

Always

11 to 14 V

A49-3 (+BM) - B58-104 (E1)

BR - BR

Power source of throttle actuator

Always

11 to 14 V

A49-28 (IGSW) - B58-104 (E1)

SB - BR

Ignition switch

Ignition switch ON

11 to 14 V

A49-2 (+B) - B58-104 (E1)

R - BR

Power source of ECM

Ignition switch ON

11 to 14 V

A49-1 (+B2) - B58-104 (E1)

GR - BR

Power source of ECM

Ignition switch ON

11 to 14 V

B58-36 (OC1+) - B58-59 (OC1-)

L-R - G-B

Camshaft timing oil control valve assembly for intake camshaft

Idling

Pulse generation (see waveform 1)

A49-6 (MREL) - B58-104 (E1)

P - BR

EFI MAIN relay

Ignition switch ON

11 to 14 V

B58-94 (VG) - B58-117 (E2G)

R - L-W

Mass air flow meter

Idling, shift lever in P or N, A/C switch off

0.5 to 3.0 V

B58-116 (THA) - B58-93 (ETHA)

L-B - W-B

Intake air temperature sensor (built into mass air flow meter)

Idling, intake air temperature 20°C (68°F)

0.5 to 3.4 V

B58-64 (THW) - B58-65 (ETHW)

G-B - B

Engine coolant temperature sensor

Idling, engine coolant temperature 80°C (176°F)

0.2 to 1.0 V

B58-88 (VCTA) - B58-111 (ETA)

Y-B - W-B

Power source of throttle position sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B58-90 (VTA1) - B58-111 (ETA)

R-W - W-B

Throttle position sensor (for engine control)

Ignition switch ON,

accelerator pedal fully released

0.5 to 1.1 V

Ignition switch ON,

accelerator pedal fully depressed

3.2 to 4.8 V

B58-89 (VTA2) - B58-111 (ETA)

B-R - W-B

Throttle position sensor (for sensor malfunction detection)

Ignition switch ON,

accelerator pedal fully released

2.1 to 3.1 V

Ignition switch ON,

accelerator pedal fully depressed

4.6 to 5.0 V

A49-55 (VPA) - A49-59 (EPA)

L - GR

Accelerator pedal position sensor (for engine control)

Ignition switch ON,

accelerator pedal fully released

0.5 to 1.1 V

Ignition switch ON,

accelerator pedal fully depressed

2.6 to 4.5 V

A49-56 (VPA2) - A49-60 (EPA2)

BE - LG

Accelerator pedal position sensor (for sensor malfunction detection)

Ignition switch ON,

accelerator pedal fully released

1.2 to 2.0 V

Ignition switch ON,

accelerator pedal fully depressed

3.4 to 4.75 V

A49-57 (VCPA) - A49-59 (EPA)

G - GR

Power source of accelerator pedal position sensor (for VPA)

Ignition switch ON

4.5 to 5.5 V

A49-58 (VCP2) - A49-60 (EPA2)

Y - LG

Power source of accelerator pedal position sensor (for VPA2)

Ignition switch ON

4.5 to 5.5 V

B58-18 (HA1A) - B58-46 (E04)

BR - W-B

Air fuel ratio sensor heater

Idling

Pulse generation (see waveform 2)

Ignition switch ON

11 to 14 V

B58-103 (A1A+) - B58-104 (E1)

P - BR

Air fuel ratio sensor

Ignition switch ON

3.3 V*1

B58-126 (A1A-) - B58-104 (E1)

L - BR

Air fuel ratio sensor

Ignition switch ON

2.9 V*1

B58-41 (HT1B) - B58-86 (E03)

Y - B

Heated oxygen sensor heater

Ignition switch ON

11 to 14 V

B58-125 (OX1B) - B58-102 (O1B-)

G - R

Heated oxygen sensor

Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

Pulse generation (see waveform 3)

B58-85 (#10) - B58-109 (E01)

B58-84 (#20) - B58-109 (E01)

B58-83 (#30) - B58-109 (E01)

B58-82 (#40) - B58-109 (E01)

G - W

Y - W

R - W

L-R - W

Fuel injector

Ignition switch ON

11 to 14 V

Idling

Pulse generation (see waveform 4)

B58-87 (KNK1) - B58-110 (EKNK)

R - G

Knock sensor

Engine speed maintained at 4000 rpm after warming up engine

Pulse generation (see waveform 5)

B58-76 (G2+) - B58-122 (G2-)

P - V

Camshaft position sensor for intake camshaft

Idling

Pulse generation (see waveform 7)

B58-74 (NE+) - B58-120 (NE-)

R - G

Crankshaft position sensor

Idling

Pulse generation (see waveform 6)

A49-53 (NEO)*2 - B58-104 (E1)

GR - BR

Crankshaft position sensor

Idling with warm engine

Pulse generation (see waveform 18)

B58-108 (IGT1) - B58-104 (E1)

B58-107 (IGT2) - B58-104 (E1)

B58-106 (IGT3) - B58-104 (E1)

B58-105 (IGT4) - B58-104 (E1)

R-L - BR

P - BR

Y-B - BR

L-Y - BR

Ignition coil (ignition signal)

Idling

Pulse generation (see waveform 8)

B58-23 (IGF1) - B58-104 (E1)

W-R - BR

Ignition coil (ignition confirmation signal)

Ignition switch ON

4.5 to 5.5 V

Idling

Pulse generation (see waveform 8)

B58-28 (PRG) - B58-104 (E1)

G - BR

Purge VSV

Ignition switch ON

11 to 14 V

Idling, under purge control

Pulse generation (see waveform 9)

A49-15 (SPD) - B58-104 (E1)

BR - BR

Speed signal from combination meter

Vehicle driven at 20 km/h (12 mph)

Pulse generation (see waveform 10)

A49-48 (STA) - B58-104 (E1)

BR - BR

Starter signal

Cranking

6 V or higher

B58-47 (NSW) - B58-104 (E1)

G - BR

Park/neutral position switch signal

Ignition switch ON, shift lever in P or N

Below 3.0 V

Ignition switch ON, shift lever not in P or N

11 to 14 V

A49-29 (STP) - B58-104 (E1)

G - BR

Stop light switch assembly

Brake pedal depressed

7.5 to 14 V

Brake pedal released

Below 1.5 V

A49-39 (ST1-) - B58-104 (E1)

V - BR

Stop light switch assembly

(opposite to voltage at STP terminal)

Ignition switch ON,

brake pedal depressed

Below 1.5 V

Ignition switch ON,

brake pedal released

7.5 to 14 V

B58-21 (M+) - B58-19 (ME01)

Y - B

Throttle actuator

Idling with warm engine

Pulse generation (see waveform 11)

B58-20 (M-) - B58-19 (ME01)

L - B

Throttle actuator

Idling with warm engine

Pulse generation (see waveform 12)

A49-8 (FC) - B58-104 (E1)

LG - BR

Fuel pump control

Ignition switch ON

11 to 14 V

Idling

Below 1.5 V

A49-36 (W) - B58-104 (E1)

R - BR

MIL

Ignition switch ON (MIL turns on)

Below 1.5 V

Idling

11 to 14 V

A49-7 (TC) - B58-104 (E1)

V - BR

Terminal TC of DLC3

Ignition switch ON

11 to 14 V

A49-26 (TACH) - B58-104 (E1)

Y - BR

Engine speed

Idling

Pulse generation (see waveform 13)

A49-42 (VPMP) - B58-104 (E1)

BE - BR

Vent valve (built into canister pump module)

Ignition switch ON

11 to 14 V

A49-34 (MPMP) - B58-104 (E1)

V - BR

Leak detection pump (built into canister pump module)

Leak detection pump OFF

Below 3 V

Leak detection pump ON

9 to 14 V

B58-113 (VCPP) - B58-112 (EPPM)

LG - W

Power source for canister pressure sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B58-114 (PPMP) - B58-112 (EPPM)

Y - W

Canister pressure sensor (built into canister pump module)

Ignition switch ON

3.0 to 3.6 V

A49-21 (FANL) - B58-104 (E1)

L - BR

FAN NO. 3 relay

Ignition switch ON

Below 1.5 V

Idling with A/C ON, or high engine coolant temperature

A49-22 (FANH) - B58-104 (E1)

P - BR

FAN NO. 1 and FAN NO. 2 relay

Idling with high engine coolant temperature

Below 1.5 V

B58-39 (ALT) - B58-104 (E1)

L - BR

Generator

Ignition switch ON

11 to 14 V

A49-13 (CANH) - B58-104 (E1)

Y - BR

CAN communication line

Ignition switch ON

Pulse generation (see waveform 14)

A49-5 (CANL) - B58-104 (E1)

W - BR

CAN communication line

Ignition switch ON

Pulse generation (see waveform 15)

B58-27 (ACIS) - B58-104 (E1)

R-Y - BR

VSV for Acoustic Control Induction System (ACIS) operation signal

Ignition switch ON

11 to 14 V

B58-35 (OE1+) - B58-58 (OE1-)

G - GR

Camshaft timing oil control valve assembly for exhaust camshaft

Idling

Pulse generation (see waveform 1)

B58-99 (VCV1) - B58-104 (E1)

LG - BR

Power source of camshaft position sensor for intake camshaft (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B58-98 (VCE1) - B58-104 (E1)

BR - BR

Power source of camshaft position sensor for exhaust camshaft (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B58-75 (EV1+) - B58-121 (EV1-)

Y - BR

Camshaft position sensor for exhaust camshaft

Idling

Pulse generation (see waveform 7)

B58-4 (IA1+) - B58-109 (E01)

BR - W

DC motor for tumble control valve

Idling with cold engine

Pulse generation (see waveform 16)

B58-3 (IA1-) - B58-109 (E01)

LG - W

DC motor for tumble control valve

Idling with cold engine

Pulse generation (see waveform 17)

B58-70 (IAC1) - B58-71 (EIA1)

R-W - B-R

Tumble control valve position sensor

Ignition switch ON

3.0 to 4.0 V

B58-72 (VCIA) - B58-104 (E1)

W-L - BR

Power source of tumble control valve position sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B58-24 (CAN+) - B58-104 (E1)

R - BR

CAN communication line

Ignition switch ON

Pulse generation (see waveform 14)

B58-1 (CAN-) - B58-104 (E1)

W - BR

CAN communication line

Ignition switch ON

Pulse generation (see waveform 15)

A49-12 (CANP)*2 - B58-104 (E1)

G - BR

CAN communication line

Ignition switch ON

Pulse generation (see waveform 14)

A49-4 (CANN)*2 - B58-104 (E1)

W - BR

CAN communication line

Ignition switch ON

Pulse generation (see waveform 15)

A49-16 (SFTU) - B58-104 (E1)

R - BR

Up shift switch signal

Ignition switch ON and shift lever in S

11 to 14 V

Ignition switch ON and shift lever in S, the "+" range (up shift) selected

Below 1 V

A49-51 (SFTD) - B58-104 (E1)

LG - BR

Down shift switch signal

Ignition switch ON and shift lever in S

11 to 14 V

Ignition switch ON and shift lever in S, the "-" range (down shift) selected

Below 1 V

B58-32 (P) - B58-104 (E1)

Y - BR

P shift position switch signal

Ignition switch ON and shift lever in P

11 to 14 V

Ignition switch ON and shift lever in any position other than P

Below 1 V

B58-33 (R) - B58-104 (E1)

V - BR

R shift position switch signal

Ignition switch ON and shift lever in R

11 to 14 V

Ignition switch ON and shift lever in any position other than R

Below 1 V

B58-34 (N) - B58-104 (E1)

L-B - BR

N shift position switch signal

Ignition switch ON and shift lever in N

11 to 14 V

Ignition switch ON and shift lever in any position other than N

Below 1 V

B58-30 (D) - B58-104 (E1)

BR - BR

D shift position switch signal

Ignition switch ON and shift lever in D

11 to 14 V

Ignition switch ON and shift lever in any position other than D

Below 1 V

A49-14 (S) - B58-104 (E1)

BE - BR

S shift position switch signal

Ignition switch ON and shift lever in S

11 to 14 V

Ignition switch ON and shift lever in any position other than S

Below 1 V

  • *1: The ECM terminal voltage is constant regardless of the output voltage shown on the Techstream.
  • *2: w/ Smart Key System

1. WAVEFORM 1

Camshaft Timing Oil Control Valve
Assembly Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-36 (OC1+) - B58-59 (OC1-)

5 V/DIV, 1 ms/DIV

Idling

B58-35 (OE1+) - B58-58 (OE1-)

5 V/DIV, 1 ms/DIV

Idling

2. WAVEFORM 2

Air Fuel Ratio Sensor (Bank 1 Sensor
1) Heater Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-18 (HA1A) - B58-46 (E04)

5 V/DIV, 10 ms/DIV

Idling

3. WAVEFORM 3

Heated Oxygen Sensor (Bank 1 Sensor
2) Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-125 (OX1B) - B58-102 (O1B-)

0.2 V/DIV, 200 ms/DIV

Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

HINT:

In the Data List, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.

4. WAVEFORM 4

Injector No. 1 (to No. 4) Injection
Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-85 (#10) - B58-109 (E01)

20 V/DIV, 20 ms/DIV

Idling

B58-84 (#20) - B58-109 (E01)

20 V/DIV, 20 ms/DIV

Idling

B58-83 (#30) - B58-109 (E01)

20 V/DIV, 20 ms/DIV

Idling

B58-82 (#40) - B58-109 (E01)

20 V/DIV, 20 ms/DIV

Idling

HINT:

The wavelength becomes shorter as the engine speed increases.

5. WAVEFORM 5

Knock Sensor Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-87 (KNK1) - B58-110 (EKNK)

1 V/DIV, 1 ms/DIV

Engine speed maintained at 4000 rpm after warming up engine

HINT:

  • The wavelength becomes shorter as the engine speed increases.
  • The waveforms and amplitudes displayed differ slightly depending on the vehicle.

6. WAVEFORM 6

Crankshaft Position Sensor Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-74 (NE+) - B58-120 (NE-)

5 V/DIV, 20 ms/DIV

Idling

HINT:

The wavelength becomes shorter as the engine speed increases.

7. WAVEFORM 7

Camshaft Position Sensor Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-76 (G2+) - B58-122 (G2-)

5 V/DIV, 20 ms/DIV

Idling

B58-75 (EV1+) - B58-121 (EV1-)

5 V/DIV, 20 ms/DIV

Idling

HINT:

The wavelength becomes shorter as the engine speed increases.

8. WAVEFORM 8

Ignition Coil IGT Signal (from ECM
to Ignition Coil) and Ignition Coil IGF Signal (from Ignition Coil to ECM)

Terminal No. (Symbol)

Tool Setting

Condition

B58-108 (IGT1) - B58-104 (E1)

2 V/DIV, 20 ms/DIV

Idling

B58-107 (IGT2) - B58-104 (E1)

2 V/DIV, 20 ms/DIV

Idling

B58-106 (IGT3) - B58-104 (E1)

2 V/DIV, 20 ms/DIV

Idling

B58-105 (IGT4) - B58-104 (E1)

2 V/DIV, 20 ms/DIV

Idling

B58-23 (IGF1) - B58-104 (E1)

2 V/DIV, 20 ms/DIV

Idling

HINT:

The wavelength becomes shorter as the engine speed increases.

9. WAVEFORM 9

Purge VSV Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-28 (PRG) - B58-104 (E1)

10 V/DIV, 20 ms/DIV

Idling, under purge control

HINT:

If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

10. WAVEFORM 10

Vehicle Speed Signal

Terminal No. (Symbol)

Tool Setting

Condition

A49-15 (SPD) - B58-104 (E1)

2 V/DIV, 20 ms/DIV

Vehicle driven at 20 km/h (12 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

11. WAVEFORM 11

Throttle Actuator Positive Terminal
Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-21 (M+) - B58-19 (ME01)

5 V/DIV, 1 ms/DIV

Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

12. WAVEFORM 12

Throttle Actuator Negative Terminal
Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-20 (M-) - B58-19 (ME01)

5 V/DIV, 1 ms/DIV

Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

13. WAVEFORM 13

Engine Speed Signal

Terminal No. (Symbol)

Tool Setting

Condition

A49-26 (TACH) - B58-104 (E1)

5 V/DIV, 10 ms/DIV

Idling

HINT:

The wavelength becomes shorter as the engine speed increases.

14. WAVEFORM 14

CAN Communication Signal (Reference)

Terminal No. (Symbol)

Tool Setting

Condition

A49-13 (CANH) - B58-104 (E1)

1 V/DIV, 10 μs/DIV

Ignition switch ON

B58-24 (CAN+) - B58-104 (E1)

1 V/DIV, 10 μs/DIV

Ignition switch ON

A49-12 (CANP) - B58-104 (E1)

1 V/DIV, 10 μs/DIV

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

15. WAVEFORM 15

CAN Communication Signal (Reference)

Terminal No. (Symbol)

Tool Setting

Condition

A49-5 (CANL) - B58-104 (E1)

1 V/DIV, 10 μs/DIV

Ignition switch ON

B58-1 (CAN-) - B58-104 (E1)

1 V/DIV, 10 μs/DIV

Ignition switch ON

A49-4 (CANN) - B58-104 (E1)

1 V/DIV, 10 μs/DIV

Ignition switch ON

HINT:

The waveform varies depending on the CAN communication signal.

16. WAVEFORM 16

DC Motor for Tumble Control Valve
Positive Terminal Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-4 (IA1+) - B58-109 (E01)

5 V/DIV, 1 ms/DIV

Idling with cold engine

17. WAVEFORM 17

DC Motor for Tumble Control Valve
Negative Terminal Signal

Terminal No. (Symbol)

Tool Setting

Condition

B58-3 (IA1-) - B58-109 (E01)

5 V/DIV, 1 ms/DIV

Idling with cold engine

18. WAVEFORM 18

Crankshaft Position Sensor Signal

Terminal No. (Symbol)

Tool Setting

Condition

A49-53 (NEO) - B58-104 (E1)

5 V/DIV, 2 ms/DIV

Idling with warm engine

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