DESCRIPTION This DTC is
output when LIN communication between the front power window regulator
motor assembly LH and main body ECU (multiplex network body ECU) stops
for 10 seconds or more. |
DTC No. | DTC Detection Condition |
Trouble Area | | B2321 |
No
communication between the front power window regulator motor assembly
LH and main body ECU (multiplex network body ECU) for 10 seconds or
more. |
- Front power window regulator motor assembly LH
- Main body ECU (multiplex network body ECU)
- Driver side junction block assembly
- Harness or connector
| WIRING DIAGRAM
 CAUTION / NOTICE / HINT
NOTICE:
HINT:
- DTC B2325 is output when the communication between all of the following
components and main body ECU (multiplex network body ECU) stops.
Click here 
- When DTC B1206 and B2321 are output simultaneously, perform the troubleshooting for DTC B1206 first.
Click here
PROCEDURE (a) Clear the DTCs.
Click here
|
NEXT |
 | |
(a) Check for DTCs.
Click here
| DTC B2321 is not output |
 | USE SIMULATION METHOD TO CHECK |
|
DTC B2321 is output | |
| |
| 3. |
INSPECT POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY |
| (a) Remove the power window regulator master switch assembly.
Click here |
 |
|
*a | Front view of wire harness connector
(to Multiplex Power Window Regulator Master Switch Assembly) | | |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
6 (LIN1) - 7 (LIN2) | Always |
Below 1 Ω |
| NG |
| REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY |
|
OK | |
| |
| 4. |
CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) |
(a) Disconnect the N12 front power window regulator motor assembly LH connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
N2-7 (LIN2) - N12-9 (LIN) |
Ignition switch off | Below 1 Ω | |
N2-7 (LIN2) or N12-9 (LIN) - Body ground |
Ignition switch off | 10 kΩ or higher |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 5. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU [MULTIPLEX NETWORK BODY ECU] - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) |
(a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.
Click here (b) Disconnect the N12 front power window regulator motor assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
A-16 (LIN2) - N12-9 (LIN) |
Always | Below 1 Ω | |
A-16 (LIN2) - Body ground |
Always | 10 kΩ or higher |
| NG |
| GO TO STEP 9 |
|
OK | |
| |
| 6. |
CHECK HARNESS AND CONNECTOR (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH - BATTERY AND BODY GROUND) |
| (a) Disconnect the front power window regulator motor assembly LH connector. |
 |
|
*a | Front view of wire harness connector
(to Front Power Window Regulator Motor Assembly LH) | | |
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
N12-1 (GND) - Body ground |
Always | Below 1 Ω |
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage: |
Tester Connection | Condition |
Specified Condition | |
N12-2 (B) - Body ground |
Always | 11 to 14 V |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
OK | |
| |
| 7. |
REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY LH |
(a) Temporarily replace the front power window regulator motor assembly LH with a new or normally functioning one.
Click here (b) Clear the DTCs.
Click here
|
NEXT | |
| |
(a) Check for DTCs.
Click here
| DTC B2321 is not output |
| END (FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH IS DEFECTIVE) |
| DTC B2321 is output |
| REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| 9. |
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) |
(a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.
Click here (b) Disconnect the N12 front power window regulator motor assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance: |
Tester Connection | Condition |
Specified Condition | |
3I-17 - N12-9 (LIN) | Always |
Below 1 Ω | |
3I-17 - Body ground | Always |
10 kΩ or higher |
| OK |
| REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY |
| NG |
| REPAIR OR REPLACE HARNESS OR CONNECTOR | | 
