WIPER / WASHER: WIPER AND WASHER SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000026OD2
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [09/2022 - 11/2022]
Title: WIPER / WASHER: WIPER AND WASHER SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (except TMC Made)

(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
4F-3 - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
4B-1 - Body ground	B - Body ground	Battery power supply	Always	11 to 14 V
4D-1 - Body ground	B-R - Body ground	Battery power supply	Always	11 to 14 V

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I84-5 (CXP1) - Body ground	BR - Body ground	CXPI communication line	Ignition switch ON	Pulse generation
I85-21 (WPS) - Body ground	R - Body ground	IG1 NO. 3 Relay operation signal	Ignition switch ON	11 to 14 V
			Less than approximately 60 seconds after ignition switch turned off	11 to 14 V
			Approximately 60 seconds or more after ignition switch turned off	Below 1 V

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY (for TMC Made)

(a) Disconnect the power distribution box assembly and main body ECU (multiplex network body ECU) connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

8D-1 - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

8F-23 - Body ground

B - Body ground*1

W - Body ground*2

Battery power supply

Always

11 to 14 V

8K-1 - Body ground

W - Body ground*1

B - Body ground*2

Ignition power supply (IG signal)

Ignition switch ON

11 to 14 V

*1: for G16E-GTS
*2: except G16E-GTS

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
8F-9 (CXP1) - Body ground	GR - Body ground1 Y - Body ground2	CXPI communication line	Ignition switch ON	Pulse generation
8F-9 (CXP1) - Body ground	GR - Body ground1 Y - Body ground2	CXPI communication line	Ignition switch off	Below 1 V
I85-6 (WPS) - Body ground	R - Body ground1 GR - Body ground2	WIPER Relay operation signal	Ignition switch ON	11 to 14 V
			Less than approximately 60 seconds after ignition switch turned off	11 to 14 V
			Approximately 60 seconds or more after ignition switch turned off	Below 1 V
I85-11 (RWRY) - Body ground*3	L - Body ground1 W - Body ground2	Rear wiper motor assembly operation signal	Rear wiper motor assembly stopped	11 to 14 V
I85-11 (RWRY) - Body ground*3	L - Body ground1 W - Body ground2	Rear wiper motor assembly operation signal	Rear wiper motor assembly operating	Below 1 V

*1: for G16E-GTS
*2: except G16E-GTS
*3: w/ Rear Wiper System

CHECK WINDSHIELD WIPER RELAY

(a) Disconnect the A55 and A56 windshield wiper relay connectors.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A55-3 (E) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A55-5 (EWS) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
A55-6 (IGWS) - Body ground	L - Body ground	Washer circuit IG power source	Ignition switch off	Below 1 V
A55-6 (IGWS) - Body ground	L - Body ground	Washer circuit IG power source	Ignition switch ON	11 to 14 V
A55-8 (+B) - Body ground	B - Body ground	Ignition switch ON signal (Power source circuit)	Ignition switch ON	11 to 14 V
			Less than approximately 60 seconds after ignition switch turned off	11 to 14 V
			Approximately 60 seconds or more after ignition switch turned off	Below 1 V
A56-5 (ES) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

(d) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.

except TMC Made:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A55-1 (+WR) - Body ground	G - Body ground	Front washer operation signal	Ignition switch ON, front washer operating	11 to 14 V
A55-2 (+1) - Body ground	R - Body ground	LO operation signal to windshield wiper motor assembly	Ignition switch ON, windshield wiper motor assembly operating in LO	11 to 14 V
A55-4 (+2) - Body ground	W - Body ground	HI operation signal to windshield wiper motor assembly	Ignition switch ON, windshield wiper motor assembly operating in HI	11 to 14 V
A55-7 (-WR) - Body ground	W - Body ground	Ground	Always	Below 1 Ω
A56-3 (2S) - Body ground	V - Body ground	Windshield wiper motor assembly HI operation signal	Windshield wiper motor assembly stopped	4.5 to 5.5 V
A56-3 (2S) - Body ground	V - Body ground	Windshield wiper motor assembly HI operation signal	Windshield wiper motor assembly operating in HI	Below 1 V
A56-4 (MPX1) - Body ground	P - Body ground	CXPI communication line	Ignition switch ON	Pulse generation
			Less than approximately 100 seconds after ignition switch turned off	Pulse generation
			Approximately 100 seconds or more after ignition switch turned off	11 to 14 V
A56-6 (+SM) - Body ground	G - Body ground	Windshield wiper motor assembly position detection signal	Windshield wiper motor assembly in LO or HI operation	Below 1 V ←→ 11 to 14V
A56-6 (+SM) - Body ground	G - Body ground	Windshield wiper motor assembly position detection signal	Windshield wiper motor assembly stopped	Below 1 V

for TMC Made:

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A55-1 (+WR) - Body ground	L - Body ground1 G - Body ground2	Front washer operation signal	Ignition switch ON, front washer operating	11 to 14 V
A55-2 (+1) - Body ground	R - Body ground	LO operation signal to windshield wiper motor assembly	Ignition switch ON, windshield wiper motor assembly operating in LO	11 to 14 V
A55-4 (+2) - Body ground	W - Body ground	HI operation signal to windshield wiper motor assembly	Ignition switch ON, windshield wiper motor assembly operating in HI	11 to 14 V
A55-7 (-WR) - Body ground*3	W - Body ground	Rear washer operation signal	Ignition switch ON, rear washer operating	11 to 14 V
A56-3 (2S) - Body ground	V - Body ground1 R - Body ground2	Windshield wiper motor assembly HI operation signal	Windshield wiper motor assembly stopped	4.5 to 5.5 V
A56-3 (2S) - Body ground	V - Body ground1 R - Body ground2	Windshield wiper motor assembly HI operation signal	Windshield wiper motor assembly operating in HI	Below 1 V
A56-4 (MPX1) - Body ground	GR - Body ground1 P - Body ground2	CXPI communication line	Ignition switch ON	Pulse generation
			Less than approximately 100 seconds after ignition switch turned off	Pulse generation
			Approximately 100 seconds or more after ignition switch turned off	11 to 14 V
A56-6 (+SM) - Body ground	G - Body ground	Windshield wiper motor assembly position detection signal	Windshield wiper motor assembly in LO or HI operation	Below 1 V ←→ 11 to 14V
A56-6 (+SM) - Body ground	G - Body ground	Windshield wiper motor assembly position detection signal	Windshield wiper motor assembly stopped	Below 1 V

*1: for G16E-GTS
*2: except G16E-GTS
*3: w/ Rear Wiper System

CHECK COMBINATION METER ASSEMBLY (w/ Level Warning Switch)

except 12.3 Inch Display:
Click here
for 12.3 Inch Display
Click here