LIGHTING (INT): LIGHTING SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001D07T
Model Year Start: 2019	Model: GR Corolla	Prod Date Range: [06/2018 - 01/2019]
Title: LIGHTING (INT): LIGHTING SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019]

TERMINALS OF ECU

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

(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
I86-19 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

(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
4E-17 - Body ground	R - Body ground	IG power supply	Engine switch on (IG)	11 to 14 V
4E-17 - Body ground	R - Body ground	IG power supply	Engine switch off	Below 1 V
4E-30 - Body ground	SB - Body ground	ACC power supply	Engine switch on (ACC)	11 to 14 V
4E-30 - Body ground	SB - Body ground	ACC power supply	Engine switch off	Below 1 V
4E-31 - Body ground	GR - Body ground	Rear door courtesy light switch assembly RH input	Rear door RH open	Below 1 V
4E-31 - Body ground	GR - Body ground	Rear door courtesy light switch assembly RH input	Rear door RH closed	11 to 14 V or pulse output (maximum 14 V)*
4F-10 - Body ground	R - Body ground	Map light assembly, rear room light (No. 1 room light assembly) and vanity light assembly power supply	DOME CUT relay on	11 to 14 V
4F-10 - Body ground	R - Body ground		DOME CUT relay off	Below 1 V
4F-12 - Body ground	BR - Body ground	Front door unlock detection switch RH input	Front door RH locked	11 to 14 V or pulse output (maximum 14 V)*
4F-12 - Body ground	BR - Body ground	Front door unlock detection switch RH input	Front door RH unlocked	Below 1 V
4F-13 - Body ground	L - Body ground	Front door unlock detection switch LH input	Front door LH locked	11 to 14 V or pulse output (maximum 14 V)*
4F-13 - Body ground	L - Body ground	Front door unlock detection switch LH input	Front door LH unlocked	Below 1 V
4F-14 - Body ground	LG - Body ground	Rear door unlock detection switch input	Rear door locked	11 to 14 V or pulse output (maximum 14 V)*
4F-14 - Body ground	LG - Body ground	Rear door unlock detection switch input	Rear door unlocked	Below 1 V
4F-29 - Body ground	V - Body ground	Illuminated entry system drive output	Map light LH and map light RH (map light assembly) and rear room light (No. 1 room light assembly) off (when operated by illuminated entry system)	11 to 14 V
4F-29 - Body ground	V - Body ground	Illuminated entry system drive output	Map light LH and map light RH (map light assembly) and rear room light (No. 1 room light assembly) off (when operated by illuminated entry system)	Below 1 V
4A-19 - Body ground	R - Body ground	No. 1 luggage compartment light assembly power supply	DOME CUT relay on	11 to 14 V
4A-19 - Body ground	R - Body ground	No. 1 luggage compartment light assembly power supply	DOME CUT relay off	Below 1 V
4A-24 - Body ground	BR - Body ground	Rear door courtesy light switch assembly LH input	Rear door LH open	Below 1 V
4A-24 - Body ground	BR - Body ground	Rear door courtesy light switch assembly LH input	Rear door LH closed	11 to 14 V or pulse output (maximum 14 V)*
4A-34 - Body ground	LG - Body ground	Back door courtesy light switch (back door lock assembly) input	Back door open	Below 1 V
4A-34 - Body ground	LG - Body ground		Back door closed	11 to 14 V or pulse output (maximum 14 V)*
I85-1 (FLCY) - Body ground	BR - Body ground	Front door courtesy light switch assembly LH input	Front door LH open	Below 1 V
I85-1 (FLCY) - Body ground	BR - Body ground	Front door courtesy light switch assembly LH input	Front door LH closed	11 to 14 V or pulse output (maximum 14 V)*
I85-6 (FRCY) - Body ground	BR - Body ground	Front door courtesy light switch assembly RH input	Front door RH open	Below 1 V
I85-6 (FRCY) - Body ground	BR - Body ground	Front door courtesy light switch assembly RH input	Front door RH closed	11 to 14 V or pulse output (maximum 14 V)*
I85-20 (BCYL) - Body ground	Y - Body ground	No. 1 luggage compartment light assembly drive output	No. 1 luggage compartment light assembly off	11 to 14 V
I85-20 (BCYL) - Body ground	Y - Body ground	No. 1 luggage compartment light assembly drive output	No. 1 luggage compartment light assembly on	Below 1 V

*: Differs depending on the vehicle model

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Measure the voltage according to the value(s) in the table below.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I1-10 (SWIL) - I1-11 (AGND)	Y - Y	Engine switch illumination drive output	Engine switch illumination on	11 to 14 V
I1-10 (SWIL) - I1-11 (AGND)	Y - Y	Engine switch illumination drive output	Engine switch illumination off	Below 1 V