Toyota Yaris: Lin Communication System / Door LIN Bus off (B232588)
DESCRIPTION
If the main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 seconds or more, DTC B232588 will be stored.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B232588 | Door LIN Bus off | The main body ECU (multiplex network body ECU) detects a communication error with an ECU connected to the door bus lines for 8 seconds or more. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
When a power window regulator motor assembly is replaced or removed and reinstalled, it is necessary to perform initialization.
Click here
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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 B232588 is output | A |
| DTC B232588 is not output | B |
| B |
 | USE SIMULATION METHOD TO CHECK |
|
| 3. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
|
| 4. | CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR) |
(a) Disconnect the L7 front power window regulator motor assembly (driver door) connector.
(b) After 10 seconds have elapsed, check if the DTC is output.
Body Electrical > Main Body > Trouble Codes| Result | Proceed to |
|---|---|
| DTC B232588 is output | A |
| DTC B232187 is not output | B |
| B |
 | REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR) |
|
| 5. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
|
| 6. | CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
(a) Disconnect the L13 multiplex network master switch assembly connector.
(b) After 10 seconds have elapsed, check if the DTC is output.
Body Electrical > Main Body > Trouble Codes| Result | Proceed to |
|---|---|
| DTC B232588 is output | A |
| DTC B120687 and B232187 is not output | B |
| B |
 | GO TO STEP 12 |
|
| 7. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
|
| 8. | CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) |
(a) Disconnect the K7 front power window regulator motor assembly (front passenger door) connector.
(b) After 10 seconds have elapsed, check if the DTC is output.
Body Electrical > Main Body > Trouble Codes| Result | Proceed to |
|---|---|
| DTC B232588 is output | A |
| DTC B232287 is not output | B |
| B |
 | REPLACE FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR) |
|
| 9. | CLEAR DTC |
(a) Clear the DTCs.
Body Electrical > Main Body > Clear DTCs
|
| 10. | CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT) |
(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.
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(b) Reconnect the power distribution box assembly connector.
(c) Disconnect the L7 front power window regulator motor assembly (driver door) connector.
(d) Disconnect the K7 front power window regulator motor assembly (front passenger door) connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| MB-15 (LIN2) - Body ground | Always | 10 kΩ or higher |
| MB-15 (LIN2) - Other terminals | Always | 10 kΩ or higher |
| OK |
 | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
|
| 11. | CHECK HARNESS AND CONNECTOR (LIN BUS CIRCUIT) |
(a) Disconnect the 4E power distribution box assembly connector.
(b) Disconnect the L7 front power window regulator motor assembly (driver door) connector.
(c) Disconnect the K7 front power window regulator motor assembly (front passenger door) connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| 4E-17 - Body ground | Always | 10 kΩ or higher |
| 4E-17 - Other terminals | Always | 10 kΩ or higher |
| OK |
 | REPLACE POWER DISTRIBUTION BOX ASSEMBLY |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 12. | CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)) |
(a) Disconnect the L13 multiplex network master switch assembly connector.
(b) Disconnect the L7 front power window regulator motor assembly (driver door) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| L13-16 (LIN2) or L7-9 (LIN) - Body ground | Always | Below 1 Ω |
| OK |
 | REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
| NG |
 | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Keys
To use the auxiliary key, press the knob and pull out the auxiliary key from the smart key.
