| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000028LVI |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM: TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
TERMINALS OF ECU
CHECK POWER DISTRIBUTION BOX ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
(a) Disconnect the MB main body ECU (multiplex network body ECU) connector.
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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) 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 |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
MB-27 (IGR) - Body ground |
IG power supply |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the MB main body ECU (multiplex network body ECU) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
8A-15 - Body ground* |
LIN communication line |
Ignition switch ON |
Pulse generation |
|
8H-11 - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
- *: w/ Sliding Roof System
CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
(a) Disconnect the L7 multiplex network master switch assembly connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
L7-11 (B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
L7-12 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the L7 multiplex network master switch assembly connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
L7-17 (LIN1) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
|
L7-16 (LIN2) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)
(a) Disconnect the L2 power window regulator motor assembly (driver door) connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
L2-2 (B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
L2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the L2 power window regulator motor assembly (driver door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
L2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)
(a) Disconnect the K2 power window regulator motor assembly (front passenger door) connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
K2-2 (B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
K2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the K2 power window regulator motor assembly (front passenger door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
K2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR) (w/ Rear Seat)
(a) Disconnect the M2 power window regulator motor assembly (rear RH door) connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
M2-2 (B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
M2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the M2 power window regulator motor assembly (rear RH door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
M2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR) (w/ Rear Seat)
(a) Disconnect the N2 power window regulator motor assembly (rear LH door) connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
N2-2 (B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
N2-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the N2 power window regulator motor assembly (rear LH door) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
N2-9 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) (w/ Sliding Roof System)
(a) Disconnect the T29 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
T29-1 (B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
T29-2 (E) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the T29 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
T29-7 (MPX1) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)
(a) Disconnect the I167 certification ECU (smart key ECU assembly) connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I167-6 (+B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
I167-29 (E) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the I167 certification ECU (smart key ECU assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I167-8 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR WITH ECU ASSEMBLY) (w/ Steering Lock)
(a) Disconnect the I59 steering lock ECU (steering lock actuator with ECU assembly) connector.
(b) 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 disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I59-7 (B) - Body ground |
Auxiliary battery power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
|
I59-1 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the I59 steering lock ECU (steering lock actuator with ECU assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I59-5 (LIN) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK ID CODE BOX (IMMOBILISER CODE ECU) (w/ Smart Key System)
(a) Disconnect the I20 ID code box (immobiliser code ECU) connector.
(b) 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 connector disconnected.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I20-5 (GND) - Body ground |
Ground |
Always |
Below 1 Ω |
|
I20-1 (+B) - Body ground |
+B power supply |
Always*1 Ignition switch off*2 |
11 to 14 V |
- *1: for Gasoline Model
- *2: for HV Model
(c) Reconnect the I20 ID code box (immobiliser code ECU) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|
|
I20-2 (LIN1) - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
|
|