Toyota Avalon Service & Repair Manual: Terminals Of Ecu

TERMINALS OF ECU

HYBRID VEHICLE CONTROL ECU

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Input/Output

Condition

Specified Condition

A23-1 (+B2) - G46-6 (E1)

W - W-B

Power source

Input

Power switch on (IG)

11 to 14 V

A23-3 (IG2) - G46-6 (E1)

B - W-B

Power source

Input

Power switch on (IG)

11 to 14 V

A23-8 (VCP2) - A23-18 (EPA2)

SB - P

Accelerator pedal sensor assembly power source (for VPA2)

Output

Power switch on (IG)

4.5 to 5.5 V

A23-9 (VCPA) - A23-20 (EPA)

BE - L

Accelerator pedal sensor assembly power source (for VPA)

Output

Power switch on (IG)

4.5 to 5.5 V

A23-13 (IWP) - G46-6 (E1)

L - W-B

Inverter water pump with motor assembly signal

Output

Power switch on (READY)

Pulse generation (Waveform 1)

A23-14 (NIWP) - G46-6 (E1)

W - W-B

Inverter water pump with motor assembly signal

Input

Power switch on (READY)

Pulse generation (Waveform 1)

A23-15 (STP) - G46-6 (E1)

LA-G - W-B

Stop light switch

Input

Brake pedal depressed

11 to 14 V

Brake pedal released

0 to 1.5 V

A23-17 (LIN3) - G46-6 (E1)

L - W-B

LIN communication signal (A/C inverter, auxiliary battery state sensor)

Input/Output

Power switch on (READY)

Pulse generation

A23-21 (TTA) - A23-31 (ETTA)

GR - SB

Transmission fluid temperature sensor

Input

Power switch on (IG), temperature 25°C (77°F)

3.6 to 4.6 V

Power switch on (IG), temperature 60°C (140°F)

2.2 to 3.2 V

A23-22 (ACCI) - G46-6 (E1)

P - W-B

ACC relay

Input

Power switch on (ACC)

11 to 14 V

A23-24 (MMT) - A23-23 (MMTG)

G - R

Motor temperature sensor

Input

Power switch on (IG), temperature 25°C (77°F)

3.6 to 4.6 V

Power switch on (IG), temperature 60°C (140°F)

2.2 to 3.2 V

A23-26 (GMT) - A23-27 (GMTG)

P - V

Generator temperature sensor

Input

Power switch on (IG), temperature 25°C (77°F)

3.6 to 4.6 V

Power switch on (IG), temperature 60°C (140°F)

2.2 to 3.2 V

A23-28 (VPA2) - A23-18 (EPA2)

GR - P

Accelerator pedal sensor assembly (for accelerator pedal position detection)

Input

Power switch on (IG), accelerator pedal released

1.0 to 2.2 V

Power switch on (IG), engine stopped, shift lever in P, accelerator pedal fully depressed

3.4 to 5.3 V

A23-30 (VPA) - A23-20 (EPA)

G - L

Accelerator pedal sensor assembly (for accelerator pedal position detection)

Input

Power switch on (IG), accelerator pedal released

0.4 to 1.4 V

Power switch on (IG), engine stopped, shift lever in P, accelerator pedal fully depressed

2.6 to 4.5 V

A24-1 (PSFT) - G46-6 (E1)

L - W-B

Shift lever position sensor power source

Output

Power switch on (ACC)

7.5 to 14 V

A24-2 (BL) - G46-6 (E1)

BE - W-B

Back-up light

Output

Power switch on (IG), shift lever in R

11 to 14 V

A24-4 (+B1) - G46-6 (E1)

R - W-B

Power source

Input

Power switch on (IG)

11 to 14 V

A24-6 (MREL) - G46-6 (E1)

G - W-B

Main relay

Output

Power switch on (IG)

11 to 14 V

A24-7 (IGB) - G46-6 (E1)

B - W-B

Power source

Input

Power switch on (IG)

8.5 to 14 V

A24-12 (HSDN) - G46-6 (E1)

W - W-B

MG ECU shutdown signal

Output

Power switch on (READY)

0 to 1.5 V

A24-13 (ILK) - G46-6 (E1)

GR - W-B

Interlock switch

Input

Power switch on (IG), service plug grip installed correctly

0 to 1.5 V

Power switch on (IG), service plug grip not installed

11 to 14 V

A24-14 (DB2) - G46-6 (E1)

V - W-B

Shift lever position signal

Input

Power switch on (IG), shift lever in D or S

7.5 to 14 V

Power switch on (IG), shift lever not in D or S

0 to 1.5 V

A24-15 (R) - G46-6 (E1)

LG - W-B

Shift lever position signal

Input

Power switch on (IG), shift lever in R

7.5 to 14 V

Power switch on (IG), shift lever not in R

0 to 1.5 V

A24-17 (PR) - G46-6 (E1)

R - W-B

Shift lever position signal

Input

Power switch on (IG), shift lever in P or R

7.5 to 14 V

Power switch on (IG), shift lever not in P or R

0 to 1.5 V

A24-20 (N) - G46-6 (E1)

G - W-B

Shift lever position signal

Input

Power switch on (IG), shift lever in N

7.5 to 14 V

Power switch on (IG), shift lever not in N

0 to 1.5 V

A24-21 (P) - G46-6 (E1)

BE - W-B

Shift lever position signal

Input

Power switch on (IG), shift lever in P

7.5 to 14 V

Power switch on (IG), shift lever not in P

0 to 1.5 V

A24-26 (DB1) - G46-6 (E1)

W - W-B

Shift lever position signal

Input

Power switch on (IG), shift lever in D or S

7.5 to 14 V

Power switch on (IG), shift lever not in D or S

0 to 1.5 V

A24-28 (ST1-) - G46-6 (E1)

LG - W-B

Stop light switch signal

Input

Power switch on (IG), brake pedal depressed

0 to 1.5 V

Power switch on (IG), brake pedal released

11 to 14 V

A24-30 (HMCL) - G46-6 (E1)

W - W-B

MG ECU communication request signal

Input/Output

Power switch on (IG)

Pulse generation (Waveform 2)

A24-31 (HMCH) - G46-6 (E1)

B - W-B

MG ECU communication request signal

Input/Output

Power switch on (IG)

Pulse generation (Waveform 2)

A24-34 (PNB) - G46-6 (E1)

B - W-B

Shift lever position signal

Input

Power switch on (IG), shift lever in P or N

7.5 to 14 V

G46-1 (SMRG) - G46-5 (E01)

G - W-B

System main relay operation signal

Output

Power switch on (IG) → Power switch on (READY)

Pulse generation (Waveform 3)

G46-3 (SMRP) - G46-5 (E01)

W - W-B

System main relay operation signal

Output

Power switch on (IG) → Power switch on (READY)

Pulse generation (Waveform 3)

G46-4 (SMRB) - G46-5 (E01)

GR - W-B

System main relay operation signal

Output

Power switch on (IG) → Power switch on (READY)

Pulse generation (Waveform 3)

G46-7 (KOK) - G46-6 (E1)

BE - W-B

Vehicle proximity notification system permission signal

Output

Power switch on (IG)

0 to 2.0 V

G46-8 (INDR) - G46-6 (E1)

LG - W-B

Shift position indicator signal

Input

Power switch on (IG), shift lever in R

0 to 3.2 V

Power switch on (IG), shift lever not in R

11 to 14 V

G46-9 (ST2) - G46-6 (E1)

L - W-B

Starter signal

Input

Power switch on (IG)

0 to 1.5 V

G46-10 (NORM) ←→ G46-6(E1)

LG - W-B

Normal mode switch (electric parking brake switch assembly) signal

Input

Power switch on (IG), normal mode switch (electric parking brake switch assembly) not operated

11 to 14 V

Power switch on (IG), normal mode switch (electric parking brake switch assembly) operated

0 to 1.5 V

G46-32 (BTH+) - G46-6 (E1)

LG - W-B

Communication signal from battery voltage sensor to hybrid vehicle control ECU

Input

Power switch on (IG)

Pulse generation (Waveform 4)

G46-33 (BTH-) - G46-6 (E1)

W - W-B

Communication signal from battery voltage sensor to hybrid vehicle control ECU

Input

Power switch on (IG)

Pulse generation (Waveform 4)

G47-1 (M) - G46-6 (E1)

B - W-B

Transmission control

Input

Power switch on (IG), shift lever in S

11 to 14 V

Power switch on (IG), shift lever not in S

0 to 1.5 V

G47-3 (BATT) - G46-6 (E1)

B - W-B

Constant power source

Input

Power switch on (IG)

11 to 14 V

Power switch on (READY)

11 to 15.5 V

G47-6 (SPRT) - G46-6 (E1)

R - W-B

Sport mode switch (electric parking brake switch assembly) signal

Input

Power switch on (IG), sport mode switch (electric parking brake switch assembly) not operated

11 to 14 V

Power switch on (IG), sport mode switch (electric parking brake switch assembly) operated

0 to 1.5 V

G47-7 (PLKC) - G46-6 (E1)

L - W-B

Shift lock release request signal

Output

Power switch on (READY), brake pedal depressed

11 to 14 V

Power switch on (READY), brake pedal released

0 to 1.5 V

G47-8 (SFTD) - G46-6 (E1)

W - W-B

Transmission control

Input

Power switch on (IG), shift lever in S

11 to 14 V

Power switch on (IG), shift lever in (-) or shift paddle switch LH (-) operated

0 to 1.5 V

G47-9 (SFTU) - G46-6 (E1)

LG - W-B

Transmission control

Input

Power switch on (IG), shift lever in S

11 to 14 V

Power switch on (IG), shift lever in (+) or shift paddle switch RH (+) operated

0 to 1.5 V

G47-10 (INDM) - G46-6 (E1)

GR - W-B

Shift position indicator signal

Input

Power switch on (IG), shift lever in S

0 to 3.2 V

Power switch on (IG), shift lever not in S

11 to 14 V

G47-11 (INDD) - G46-6 (E1)

W - W-B

Shift position indicator signal

Input

Power switch on (IG), shift lever in D

0 to 3.2 V

Power switch on (IG), shift lever not in D

11 to 14 V

G47-12 (INDN) - G46-6 (E1)

R - W-B

Shift position indicator signal

Input

Power switch on (IG), shift lever in N

0 to 3.2 V

Power switch on (IG), shift lever not in N

11 to 14 V

G47-13 (INDP) - G46-6 (E1)

L - W-B

Shift position indicator signal

Input

Power switch on (IG), shift lever in P

0 to 3.2 V

Power switch on (IG), shift lever not in P

11 to 14 V

G47-14 (ABFS) - G46-6 (E1)

B - W-B

Airbag activation signal

Input

Power switch on (READY)

Pulse generation (Waveform 5)

G47-15 (EVSW) - G46-6 (E1)

G - W-B

EV drive mode switch (electric parking brake switch assembly) signal

Input

Power switch on (IG), EV drive mode switch (electric parking brake switch assembly) not operated

11 to 14 V

Power switch on (IG), EV drive mode switch (electric parking brake switch assembly) operated

0 to 1.5 V

G47-24 (CA1L) - G46-6 (E1)

W - W-B

CAN communication signal

Input/Output

Power switch on (IG)

Pulse generation (Waveform 6)

G47-25 (CA1H) - G46-6 (E1)

L - W-B

CAN communication signal

Input/Output

Power switch on (IG)

Pulse generation (Waveform 6)

G47-28 (TC) - G46-6 (E1)

GR - W-B

Diagnosis terminal

Input

Power switch on (IG)

11 to 14 V

G47-29 (SI0) - G46-6 (E1)

L - W-B

HV battery cooling blower assembly operation signal

Output

Cooling fans operating

Pulse generation (Waveform 7)

Cooling fans not operating

4.5 to 5.5 V

G47-30 (CA3N) - G46-6 (E1)

W - W-B

CAN communication signal

Input/Output

Power switch on (IG)

Pulse generation (Waveform 8)

G47-31 (CA3P) - G46-6 (E1)

G - W-B

CAN communication signal

Input/Output

Power switch on (IG)

Pulse generation (Waveform 8)

(a) Oscilloscope waveforms

HINT:

Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering waveforms have been omitted.

(1) Waveform 1 (Inverter water pump assembly signal)

Item

Content

Terminal

CH1: A23-13 (IWP) - G46-6 (E1)

CH2: A23-14 (NIWP) - G46-6 (E1)

Equipment Setting

5 V/DIV., 20 ms./DIV.

Condition

Power switch on (READY)

HINT:

The duty of the IWP signal and the frequency of the NIWP signal change according to the coolant (for inverter) temperature.

(2) Waveform 2 (MG ECU communication signal)

Item

Content

Terminal

CH1: A24-31 (HMCH) - G46-6 (E1)

CH2: A24-30 (HMCL) - G46-6 (E1)

Equipment Setting

1 V/DIV., 50 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(3) Waveform 3 (System main relay operation signal)

Item

Content

Terminal

CH1: G46-3 (SMRP) - G46-5 (E01)

CH2: G46-4 (SMRB) - G46-5 (E01)

CH3: G46-1 (SMRG) - G46-5 (E01)

Equipment Setting

10 V/DIV., 200 ms./DIV.

Condition

Power switch on (IG) → Power switch on (READY)

(4) Waveform 4 (Communication signal from battery voltage sensor to hybrid vehicle control ECU)

Item

Content

Terminal

CH1: G46-32 (BTH+) - G46-6 (E1)

CH2: G46-33 (BTH-) - G46-6 (E1)

Equipment Setting

2 V/DIV., 500 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(5) Waveform 5 (Airbag activation signal)

Item

Content

Terminal

G47-14 (ABFS) - G46-6 (E1)

Equipment Setting

5 V/DIV., 150 ms./DIV.

Condition

Power switch on (READY)

(6) Waveform 6 (CAN communication signal)

Item

Content

Terminal

CH1: G47-25 (CA1H) - G46-6 (E1)

CH2: G47-24 (CA1L) - G46-6 (E1)

Equipment Setting

1 V/DIV., 50 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(7) Waveform 7 (HV battery blower fan operation signal)

Item

Content

Terminal

G47-29 (SI0) - G46-6 (E1)

Equipment Setting

10 V/DIV., 1 ms./DIV.

Condition

Cooling fans operating

HINT:

The waveform will vary with the operating speed of the battery cooling blower assembly.

(8) Waveform 8 (CAN communication signal)

Item

Content

Terminal

CH1: G47-31 (CA3P) - G46-6 (E1)

CH2: G47-30 (CA3N) - G46-6 (E1)

Equipment Setting

1 V/DIV., 50 μs./DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

BATTERY VOLTAGE SENSOR

Terminal No.

(Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

y6-1 (TC0) - y6-7 (GC0)

G - G

IN

Intake air temperature sensor

Power switch on (IG), HV battery intake air temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

y6-2 (TB2) - y6-8 (GB2)

R - R

IN

Battery temperature sensor 2

Power switch on (IG), HV battery temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

y6-3 (TB1) - y6-9 (GB1)

W - W

IN

Battery temperature sensor 1

Power switch on (IG), HV battery temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

y6-4 (TB0) - y6-10 (GB0)

L - L

IN

Battery temperature sensor 0

Power switch on (IG),, HV battery temperature: -40 to 90°C (-40 to 194°F)

4.8 (-40°C (-40°F)) to 1.0 V (90°C (194°F))

y6-5 (IB0) - y6-12 (GIB)

Y - B

IN

Battery current sensor

Power switch on (IG)

0.5 to 4.5 V

y6-6 (VIB) - y6-12 (GIB)

BR - B

OUT

Power source for battery current sensor

Power switch on (IG)

4.5 to 5.5 V

K17-1 (IGCT) - K17-5 (GND)

BE - W-B

IN

Control signal

Power switch on (IG)

11 to 14 V

K17-2 (BTH+) - K17-5 (GND)

GR - W-B

OUT

Serial communication

Power switch on (IG)

Pulse generation

(waveform 1)

K17-3 (BTH-) - K17-5 (GND)

W - W-B

OUT

Serial communication

Power switch on (IG)

Pulse generation

(waveform 2)

K17-5 (GND) - Body ground

W-B

-

Ground

Always (continuity check)

Below 1 Ω

K17-8 (FP0) - K17-5 (GND)

B - W-B

IN

Battery cooling blower monitor signal

Battery cooling blower assembly stopped

0 Hz

Battery cooling blower assembly operating (Active Test of cooling fan being performed)

Pulse generation

(waveform 3)

(a) Oscilloscope waveforms

HINT:

Oscilloscope waveform samples are provided here for informational purposes. Noise and fluttering waveforms have been omitted.

(1) Waveform 1 (Serial communication)

Item

Content

Terminal

K17-2 (BTH+) - K17-5 (GND)

Equipment Setting

2 V/DIV., 500 μs/DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(2) Waveform 2 (Serial communication)

Item

Content

Terminal

K17-3 (BTH-) - K17-5 (GND)

Equipment Setting

2 V/DIV., 500 μs/DIV.

Condition

Power switch on (IG)

HINT:

The waveform will vary depending on the content of the digital communication (digital signal).

(3) Waveform 3 (Battery cooling blower monitor signal)

Item

Content

Terminal

K17-8 (FP0) - K17-5 (GND)

Equipment Setting

2 V/DIV., 2 ms/DIV.

Condition

Battery cooling blower assembly operating (Active Test of cooling fan being performed)

HINT:

The frequency of the waveform will vary with the operating speed of the battery cooling blower assembly.

    System Diagram

    Transmission Control Switch Circuit

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