| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM10000000269FU |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: DOOR LOCK: KEY REMINDER WARNING SYSTEM: TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - ] | ||
TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (for TMMMS Made)
(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here
![2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; 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) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I86-19 (GND2) - 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) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
MB-11 (GND1) - Body ground |
Ground |
Always |
Below 1 Ω |
|
MB-30 (ACC) - Body ground |
ACC power supply |
Ignition switch ACC |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
||
|
MB-31 (BECU) - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
MB-32 (IG) - Body ground |
IG power supply |
Ignition switch ON |
11 to 14 V |
|
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) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I85-1 (FLCY) - Body ground |
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)* |
|
4E-41 (KSW) - Body ground |
Key unlock warning switch input |
No key in ignition key cylinder → Key in ignition key cylinder |
11 to 14 V → Below 1 V |
- *: Differs depending on the vehicle model
CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (for TMC Made)
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
Click here
(b) Reconnect the power distribution box assembly connectors.
(c) Measure the voltage and 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) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
MB-13 (GND1) - Body ground |
Ground |
Always |
Below 1 Ω |
|
MB-14 (GND2) - Body ground |
Ground |
Always |
Below 1 Ω |
|
MB-26 (BECU) - Body ground |
Auxiliary battery power supply |
Ignition switch off |
11 to 14 V |
|
MB-27 (IGR) - Body ground |
IG power supply |
Ignition switch ON |
11 to 14 V |
(d) Install the main body ECU (multiplex network body ECU) to the power distribution box assembly.
(e) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
8H-23 (FLCY) - Body ground |
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)* |
|
I85-16 (KSW) - Body ground |
Unlock warning switch input |
No key in ignition key cylinder |
11 to 14 V |
|
Door control switch assembly lock switch input |
Key in ignition key cylinder |
Below 1 Ω |
- *: Differs depending on the vehicle model
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