- Ignition switch ON
- Rear defogger switch off
| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028DZ8 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: MIRROR (EXT): POWER MIRROR CONTROL SYSTEM: TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
TERMINALS OF ECU
CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY
(a) Disconnect the power distribution box assembly and main body ECU (multiplex network body ECU) connectors.
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![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL](/t3Portal/stylegraphics/info.gif)
(b) Reconnect the power distribution box assembly connectors.
(c) Measure the resistance and voltage according to the value(s) in the table below.
|
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 |
Ignition power supply (IG signal) |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
(d) Install the main body ECU (multiplex network body ECU) to power distribution box assembly.
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(e) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
8A-6 - Body ground* |
Mirror heater drive voltage (Output) |
|
Below 1 V |
|
11 to 14 V |
- *: w/ Mirror Heater
CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (w/ Mirror Heater)
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AIR CONDITIONING CONTROL ASSEMBLY (w/ Mirror Heater)
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