| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001GXJO |
| Model Year Start: 2020 | Model: Corolla | Prod Date Range: [01/2019 - 06/2021] |
| Title: LIGHTING (INT): LIGHTING SYSTEM (for HV Model): TERMINALS OF ECU; 2020 - 2021 MY Corolla Corolla HV [01/2019 - 06/2021] | ||
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 |
Auxiliary battery power supply |
Power switch off |
11 to 14 V |
|
4D-1 - Body ground |
B-R - Body ground |
Auxiliary battery power supply |
Power switch off |
11 to 14 V |
|
I86-19 (GND2) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Connect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.
(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 |
Power switch on (IG) |
11 to 14 V |
|
Power switch off |
Below 1 V |
|||
|
4E-30 - Body ground |
P - Body ground |
ACC power supply |
Power switch on (ACC) |
11 to 14 V |
|
Power 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 |
|
Rear door RH closed |
11 to 14 V or pulse output (maximum 14 V)*2 |
|||
|
4E-36 - Body ground* |
GR - Body ground |
Cup holder light (console box pocket garnish) drive output |
Cup holder light (console box pocket garnish) off |
11 to 14 V |
|
Cup holder light (console box pocket garnish) at full brightness |
Below 2.2 V |
|||
|
Cup holder light (console box pocket garnish) dimmer control operating (dimming) |
Pulse generation |
|||
|
4E-37 - Body ground* |
Y - Body ground |
Center tray illumination light (instrument panel light assembly) drive output |
Center tray illumination light (instrument panel light assembly) off |
11 to 14 V |
|
Center tray illumination light (instrument panel light assembly) at full brightness |
Below 2.2 V |
|||
|
Center tray illumination light (instrument panel light assembly) dimmer control operating (dimming) |
Pulse generation |
|||
|
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 |
|
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)*2 |
|
Front door RH unlocked |
Below 1 V |
|||
|
4F-13 - Body ground |
SB - Body ground |
Front door unlock detection switch LH input |
Front door LH locked |
11 to 14 V or pulse output (maximum 14 V)*2 |
|
Front door LH unlocked |
Below 1 V |
|||
|
4F-14 - Body ground |
GR - Body ground |
Rear door unlock detection switch input |
Rear door locked |
11 to 14 V or pulse output (maximum 14 V)*2 |
|
Rear door unlocked |
Below 1 V |
|||
|
4F-24 - Body ground* |
B - Body ground |
Door ambient illumination light RH (front door trim board sub-assembly RH) power supply |
Power switch off |
11 to 14 V |
|
4F-25 - Body ground* |
LG - Body ground |
Center tray illumination light (instrument panel light assembly) power supply |
Power switch off |
11 to 14 V |
|
4F-26 - Body ground* |
W - Body ground |
Cup holder light (Console box pocket garnish) power supply |
Power switch off |
11 to 14 V |
|
4F-27 - Body ground* |
R - Body ground |
Door ambient illumination light LH (front door trim board sub-assembly LH) power supply |
Power switch off |
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) |
11 to 14 V |
|
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 |
|
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 |
|
Rear door LH closed |
11 to 14 V or pulse output (maximum 14 V)*2 |
|||
|
4A-34 - Body ground |
SB - Body ground |
Luggage compartment door courtesy light switch (luggage compartment door lock assembly) input |
Luggage compartment door open |
Below 1 V |
|
Luggage compartment door closed |
11 to 14 V or pulse output (maximum 14 V)*2 |
|||
|
I85-1 (FLCY) - Body ground |
BR - Body ground |
Front door courtesy light switch assembly LH input |
Front door LH open |
Below 1 V |
|
Front door LH closed |
11 to 14 V or pulse output (maximum 14 V)*2 |
|||
|
I85-6 (FRCY) - Body ground |
SB - Body ground |
Front door courtesy light switch assembly RH input |
Front door RH open |
Below 1 V |
|
Front door RH closed |
11 to 14 V or pulse output (maximum 14 V)*2 |
|||
|
I85-20 (TCYL) - Body ground |
Y - Body ground |
No. 1 luggage compartment light assembly drive output |
No. 1 luggage compartment light assembly off |
11 to 14 V |
|
No. 1 luggage compartment light assembly on |
Below 1 V |
|||
|
I84-20 (LED1) - Body ground* |
G - Body ground |
Door ambient illumination light (door trim board sub-assembly) drive output |
Door ambient illumination light (door trim board sub-assembly) off |
11 to 14 V |
|
Door ambient illumination light (door trim board sub-assembly) at full brightness |
Below 2.2 V |
|||
|
Door ambient illumination light (door trim board sub-assembly) dimmer control operating (dimming) |
Pulse generation |
- *: w/ Ambient Illumination Light
- *2: 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 - W |
Power switch illumination drive output |
Power switch illumination on |
11 to 14 V |
|
Power switch illumination off |
Below 1 V |
|
|