Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Hybrid / Battery Control / Hybrid Control System / 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
A23-15 (STP) - G46-6 (E1)	LA-G - W-B	Stop light switch	Input	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
A23-21 (TTA) - A23-31 (ETTA)	GR - SB	Transmission fluid temperature sensor	Input	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
A23-24 (MMT) - A23-23 (MMTG)	G - R	Motor temperature sensor	Input	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
A23-26 (GMT) - A23-27 (GMTG)	P - V	Generator temperature sensor	Input	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
A23-28 (VPA2) - A23-18 (EPA2)	GR - P		Input	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
A23-30 (VPA) - A23-20 (EPA)	G - L		Input	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
A24-13 (ILK) - G46-6 (E1)	GR - W-B	Interlock switch	Input	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
A24-14 (DB2) - G46-6 (E1)	V - W-B	Shift lever position signal	Input	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
A24-15 (R) - G46-6 (E1)	LG - W-B	Shift lever position signal	Input	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
A24-17 (PR) - G46-6 (E1)	R - W-B	Shift lever position signal	Input	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
A24-20 (N) - G46-6 (E1)	G - W-B	Shift lever position signal	Input	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
A24-21 (P) - G46-6 (E1)	BE - W-B	Shift lever position signal	Input	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
A24-26 (DB1) - G46-6 (E1)	W - W-B	Shift lever position signal	Input	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
A24-28 (ST1-) - G46-6 (E1)	LG - W-B	Stop light switch signal	Input	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
G46-8 (INDR) - G46-6 (E1)	LG - W-B	Shift position indicator signal	Input	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
G46-10 (NORM) ←→ G46-6(E1)	LG - W-B		Input	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
G47-1 (M) - G46-6 (E1)	B - W-B	Transmission control	Input	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
G47-3 (BATT) - G46-6 (E1)	B - W-B	Constant power source	Input	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
G47-6 (SPRT) - G46-6 (E1)	R - W-B		Input	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
G47-7 (PLKC) - G46-6 (E1)	L - W-B	Shift lock release request signal	Output	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
G47-8 (SFTD) - G46-6 (E1)	W - W-B	Transmission control	Input	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
G47-9 (SFTU) - G46-6 (E1)	LG - W-B	Transmission control	Input	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
G47-10 (INDM) - G46-6 (E1)	GR - W-B	Shift position indicator signal	Input	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
G47-11 (INDD) - G46-6 (E1)	W - W-B	Shift position indicator signal	Input	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
G47-12 (INDN) - G46-6 (E1)	R - W-B	Shift position indicator signal	Input	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
G47-13 (INDP) - G46-6 (E1)	L - W-B	Shift position indicator signal	Input	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
G47-15 (EVSW) - G46-6 (E1)	G - W-B		Input	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)
G47-29 (SI0) - G46-6 (E1)	L - W-B	HV battery cooling blower assembly operation signal	Output	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
K17-8 (FP0) - K17-5 (GND)	B - W-B	IN	Battery cooling blower monitor signal	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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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

System Diagram

Transmission Control Switch Circuit

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