| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001H6QG |
| Model Year Start: 2020 | Model: GR Corolla | Prod Date Range: [01/2019 - 09/2022] |
| Title: NETWORKING: LIN COMMUNICATION SYSTEM (for Gasoline Model): B1206,B1273,B2321-B2324; P/W Master Switch Communication Stop; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] | ||
|
DTC |
B1206 |
P/W Master Switch Communication Stop |
|
DTC |
B1273 |
Sliding Roof ECU Communication Stop |
|
DTC |
B2321 |
D-Door Motor ECU Communication Stop |
|
DTC |
B2322 |
P-Door Motor ECU Communication Stop |
|
DTC |
B2323 |
RR-Door Motor ECU Communication Stop |
|
DTC |
B2324 |
RL-Door Motor ECU Communication Stop |
DESCRIPTION
This DTC is stored when LIN communication between the main body ECU (multiplex network body ECU) and multiplex network master switch assembly, power window regulator motor assembly (driver door), power window regulator motor assembly (front passenger door), power window regulator motor assembly (rear RH door), power window regulator motor assembly (rear LH door) or sliding roof ECU (sliding roof drive gear sub-assembly)* stops for 10 seconds or more.
- *: w/ Sliding Roof System
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
B1206 |
P/W Master Switch Communication Stop |
No communication between multiplex network master switch assembly and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
|
B1273 |
Sliding Roof ECU Communication Stop |
No communication between sliding roof ECU (sliding roof drive gear sub-assembly) and main body ECU (multiplex network body ECU) for 10 seconds or more.* |
|
|
B2321 |
D-Door Motor ECU Communication Stop |
No communication between power window regulator motor assembly (driver door) and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
|
B2322 |
P-Door Motor ECU Communication Stop |
No communication between power window regulator motor assembly (front passenger door) and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
|
B2323 |
RR-Door Motor ECU Communication Stop |
No communication between power window regulator motor assembly (rear RH door) and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
|
B2324 |
RL-Door Motor ECU Communication Stop |
No communication between power window regulator motor assembly (rear LH door) and main body ECU (multiplex network body ECU) for 10 seconds or more. |
|
- *: w/ Sliding Roof System
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
-
When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.
Click here
![2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022]; WINDOW / GLASS: POWER WINDOW CONTROL SYSTEM (for Gasoline Model): INITIALIZATION](/t3Portal/stylegraphics/info.gif)
-
When the sliding roof ECU (sliding roof drive gear sub-assembly) is replaced or removed and reinstalled, it is necessary to perform initialization.*
Click here
- *: w/ Sliding Roof System
-
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.*
Click here
- *: w/ Smart Key System
PROCEDURE
|
1. |
CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
|
|
2. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Main Body > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC is not output |
A |
|
DTC B1206, B1273*, B2321, B2322, B2323 and B2324 are output |
B |
|
DTC B1206 and B2321 are output |
C |
|
Only DTC B1206 is output |
D |
|
Only DTC B1273 is output* |
E |
|
Only DTC B2321 is output |
F |
|
Only DTC B2322 is output |
G |
|
Only DTC B2323 is output |
H |
|
Only DTC B2324 is output |
I |
- *: w/ Sliding Roof System
| A |
|
| C |
|
| D |
|
| E |
|
| F |
|
| G |
|
| H |
|
| I |
|
|
|
3. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the instrument panel junction block assembly.
Click here
|
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4A-25 - MB-16 (LIN2) |
Always |
Below 1 Ω |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|
4. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY) |
(a) Disconnect the 4A instrument panel junction block assembly connector.
(b) Disconnect the L7 multiplex network master switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4A-25 - L7-17 (LIN1) |
Ignition switch off |
Below 1 Ω |
| OK |
|
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - BATTERY AND BODY GROUND) |
(a) Disconnect the L7 multiplex network master switch assembly connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-11 (B) - L7-12 (GND) |
Always |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-12 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY |
(a) Remove the instrument panel junction block assembly.
Click here
|
*a |
Component without harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
(c) Measure the resistance according to the value(s) in the table below.
HINT:
This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4F-17 - MB-16 (LIN2) |
Always |
Below 1 Ω |
| NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|
|
7. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY)) |
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4F-17 - T12-7 (MPX1) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
8. |
CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) - BATTERY AND BODY GROUND) |
(a) Disconnect the T12 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T12-1 (B) - T12-2 (E) |
Always |
11 to 14 V |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
T12-2 (E) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
|
(a) Remove the multiplex network master switch assembly. Click here
|
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
16 - 17 |
Always |
Below 1 Ω |
| NG |
|
|
|
10. |
CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)) |
(a) Disconnect the L2 power window regulator motor assembly (driver door) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L7-16 (LIN2) - L2-9 (LIN) |
Always |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
11. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR) - BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L2-2 (B) - L2-1 (GND) |
Always |
11 to 14 V |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
L2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
12. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)) |
(a) Disconnect the 4A instrument panel junction block assembly connector.
(b) Disconnect the K2 power window regulator motor assembly (front passenger door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4A-25 - K2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
13. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) - BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K2-2 (B) - K2-1 (GND) |
Always |
11 to 14 V |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
14. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)) |
(a) Disconnect the 4A instrument panel junction block assembly connector.
(b) Disconnect the M2 power window regulator motor assembly (rear RH door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4A-25 - M2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
15. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR) - BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M2-2 (B) - M2-1 (GND) |
Always |
11 to 14 V |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
M2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
16. |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)) |
(a) Disconnect the 4A instrument panel junction block assembly connector.
(b) Disconnect the N2 power window regulator motor assembly (rear LH door) connector.
(c) Measure the resistance according to the value(s) in the table below.
NOTICE:
Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
4A-25 - N2-9 (LIN) |
Ignition switch off |
Below 1 Ω |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
17. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR) - BATTERY AND BODY GROUND) |
(a) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N2-2 (B) - N2-1 (GND) |
Always |
11 to 14 V |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
N2-1 (GND) - Body ground |
Always |
Below 1 Ω |
| OK |
|
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|