| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001HEEK |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: DOOR LOCK: KEY REMINDER WARNING SYSTEM: TERMINALS OF ECU; 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022] | ||
TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here
![2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Measure the resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connectors connected.
|
Terminal No. (Symbol) |
Wiring Color |
Input/Output |
Terminal Description |
Condition |
Specified Condition |
Related Data List Item |
|---|---|---|---|---|---|---|
|
I86-19 (GND2) - Body ground |
W-B - Body ground |
- |
Ground |
Always |
Below 1 Ω |
- |
(c) Reconnect the instrument panel junction block assembly connectors.
(d) Measure the resistance and voltage according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connectors connected.
|
Terminal No. (Symbol) |
Wiring Color |
Input/Output |
Terminal Description |
Condition |
Specified Condition |
Related Data List Item |
|---|---|---|---|---|---|---|
|
MB-11 (GND1) - Body ground |
- |
- |
Ground |
Always |
Below 1 Ω |
- |
|
MB-30 (ACC) - Body ground |
- |
Input |
ACC power supply |
Ignition switch ACC |
11 to 14 V |
ACC SW |
|
Ignition switch off |
Below 1 V |
|||||
|
MB-31 (BECU) - Body ground |
- |
Input |
Battery power supply |
Always |
11 to 14 V |
- |
|
MB-32 (IG) - Body ground |
- |
Input |
IG power supply |
Ignition switch ON |
11 to 14 V |
IG SW |
|
Ignition switch off |
Below 1 V |
(e) Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.
Click here
(f) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Input/Output |
Terminal Description |
Condition |
Specified Condition |
Related Data List Item |
|---|---|---|---|---|---|---|
|
I85-1 (FLCY) - Body ground |
BR- Body ground |
Input |
Front door courtesy light switch (for LH) input |
Front door LH open → closed |
Below 1 V → 11 to 14 V or pulse output (maximum 14 V)* |
FL Door Courtesy SW |
|
4E-41 (KSW) - Body ground |
LG - Body ground |
Input |
Key unlock warning switch input |
No key in ignition key cylinder → Key in ignition key cylinder |
11 to 14 V → Below 1 V |
Key Unlock Warning SW |
- *: Differs depending on the vehicle model
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