| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM100000001H6OF |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 06/2021] |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM (for Gasoline Model): TERMINALS OF ECU; 2020 - 2021 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 06/2021] | ||
TERMINALS OF ECU
CHECK INSTRUMENT PANEL JUNCTION BLOCK 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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![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 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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
MB-11 (GND1) - Body ground |
- |
Ground |
Always |
Below 1 Ω |
|
MB-31 (BECU) - Body ground |
- |
Battery power supply |
Always |
11 to 14 V |
|
MB-30 (ACC) - Body ground |
- |
ACC power supply |
Ignition switch ACC |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
|||
|
MB-32 (IG) - Body ground |
- |
IG power supply |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
4A-25 - Body ground |
B - Body ground*1 GR - Body ground*2 |
LIN communication line |
Ignition switch ON |
Pulse generation |
|
4F-17 - Body ground*3 |
GR - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
- *1: for Hatchback
- *2: for Sedan
- *3: w/ Sliding Roof System
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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
L2-2 (B) - Body ground |
L - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
L2-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
L2-9 (LIN) - Body ground |
B - Body ground*1 W - Body ground*2 |
LIN communication line |
Ignition switch ON |
Pulse generation |
- *1: for Hatchback
- *2: for Sedan
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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
K2-2 (B) - Body ground |
LA-L - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
K2-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
K2-9 (LIN) - Body ground |
W - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
M2-2 (B) - Body ground |
LA-R - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
M2-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
M2-9 (LIN) - Body ground |
LG - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
N2-2 (B) - Body ground |
LA-R - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
N2-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
N2-9 (LIN) - Body ground |
LG - 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 T12 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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
T12-1 (B) - Body ground |
LA-L - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
T12-2 (E) - Body ground |
LA - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the T12 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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
T12-7 (MPX1) - Body ground |
SB - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
L7-11 (B) - Body ground |
B - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
L7-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
L7-17 (LIN1) - Body ground |
LG - Body ground |
LIN communication line |
Ignition switch ON |
Pulse generation |
|
L7-16 (LIN2) - Body ground |
B - Body ground*1 W - Body ground*2 |
LIN communication line |
Ignition switch ON |
Pulse generation |
- *1: for Hatchback
- *2: for Sedan
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)
(a) Disconnect the I1 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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I1-3 (+B) - Body ground |
GR - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
I1-18 (E) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the I1 certification ECU (smart key ECU assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I1-14 (LIN) - Body ground |
BR - Body ground*1 V - Body ground*2 |
LIN communication line |
Ignition switch ON |
Pulse generation |
- *1: for Hatchback
- *2: for Sedan
CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) (w/ Smart Key System)
(a) Disconnect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(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 |
|---|---|---|---|---|
|
I59-7 (B) - Body ground |
L - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
I59-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
(c) Reconnect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) connector.
(d) Check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I59-5 (LIN) - Body ground |
V - Body ground*1 G - Body ground*2 |
LIN communication line |
Ignition switch ON |
Pulse generation |
- *1: for Hatchback
- *2: for Sedan
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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I20-5 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
I20-1 (+B) - Body ground |
B - Body ground*1 L - Body ground*2 |
+B power supply |
Always |
11 to 14 V |
- *1: for Hatchback
- *2: for Sedan
(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) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
I20-2 (LIN1) - Body ground |
B - Body ground*1 P - Body ground*2 |
LIN communication line |
Ignition switch ON |
Pulse generation |
- *1: for Hatchback
- *2: for Sedan
|
|