Lexus ES: Power Window Switch Malfunction (B2312)
DESCRIPTION
The power window regulator motor assemblies are operated by the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assemblies. The power window regulator motor assemblies have motor, regulator and ECU functions.
This DTC is stored when the ECU built into a power window regulator motor assembly and multiplex network master switch assembly determine that the multiplex network master switch assembly, power window regulator switch assembly or rear power window regulator switch assembly is stuck.
Master Switch| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2312 | Power Window Switch Malfunction |
| Multiplex network master switch assembly |
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2312 | Power Window Switch Malfunction |
|
|
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2312 | Power Window Switch Malfunction |
|
|
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2312 | Power Window Switch Malfunction |
|
|
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B2312 | Power Window Switch Malfunction |
|
|
WIRING DIAGRAM
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CAUTION / NOTICE / HINT
NOTICE:
- DTC B2312 is stored in the multiplex network master switch assembly and in each power window regulator motor assembly.
-
If a power window regulator motor assembly has been replaced with a new one, initialize the power window control system.
Click here
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- Inspect the fuses for circuits related to this system before performing the following procedure.
-
The power window control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power window control system after confirming that the communication system is functioning properly.
Click here
HINT:
If DTC B2312 is not output again after the DTC has been cleared, the DTC was stored due to the switch being held in the same position continuously.
PROCEDURE
| 1. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / (desired system) / Clear DTCs.
(e) Clear the DTCs.
Body Electrical > Master Switch > Clear DTCs Body Electrical > D-Door Motor > Clear DTCs Body Electrical > P-Door Motor > Clear DTCs Body Electrical > RL-Door Motor > Clear DTCs Body Electrical > RR-Door Motor > Clear DTCs(f) Check for DTCs.
Body Electrical > Master Switch > Trouble Codes Body Electrical > D-Door Motor > Trouble Codes Body Electrical > P-Door Motor > Trouble Codes Body Electrical > RL-Door Motor > Trouble Codes Body Electrical > RR-Door Motor > Trouble CodesOK:
DTC B2312 is not output.
| OK | .gif) | END (DTC WAS STORED DUE TO SWITCH BEING OPERATED FOR 20 SECONDS OR MORE) |
|
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| 2. | CHECK DTC OUTPUT |
(a) Check the parts from which this DTC has been output.
| Result | Proceed to |
|---|---|
| DTC output from multiplex network master switch assembly | A |
| DTC output from power window regulator motor assembly (for driver door) | B |
| DTC output from power window regulator motor assembly (for front passenger door) | C |
| DTC output from power window regulator motor assembly (for rear LH door) | D |
| DTC output from power window regulator motor assembly (for rear RH door) | E |
| A | | REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
| C | | GO TO STEP 6 |
| D | | GO TO STEP 9 |
| E | | GO TO STEP 12 |
|
| 3. | READ VALUE USING TECHSTREAM (D-DOOR MOTOR) |
(a) Enter the following menus: Body Electrical / D-Door Motor / Data List.
(b) Read the Data List according to the display on the Techstream.
Body Electrical > D-Door Motor > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| D Door P/W Up SW | Driver door power window manual up switch signal | OFF or ON | OFF: Driver door power window manual up switch not being operated ON: Driver door power window manual up switch being operated | - |
| D Door P/W Down SW | Driver door power window manual down switch signal | OFF or ON | OFF: Driver door power window manual down switch not being operated ON: Driver door power window manual down switch being operated | - |
| Tester Display |
|---|
| D Door P/W Up SW |
| D Door P/W Down SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) |
|
| 4. | CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
| (a) Disconnect the J27 power window regulator motor assembly (for driver door) connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J27-10 (UP1) - Body ground | Engine switch on (IG) | 11 to 14 V |
| J27-7 (DWN1) - Body ground | Engine switch on (IG) | 11 to 14 V |
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) |
|
| 5. | CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)) |
(a) Disconnect the J20 multiplex network master switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J20-20 (UP) or J27-10 (UP1) - Body ground | Always | 10 kΩ or higher |
| J20-15 (DOWN) or J27-7 (DWN1) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 6. | READ VALUE USING TECHSTREAM (P-DOOR MOTOR) |
(a) Enter the following menus: Body Electrical / P-Door Motor / Data List.
(b) Read the Data List according to the display on the Techstream.
Body Electrical > P-Door Motor > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| P Door P/W Auto SW | Front passenger door power window auto switch signal | OFF or ON | OFF: Front passenger door power window auto up or auto down switch not being operated ON: Front passenger door power window auto up or auto down switch being operated | - |
| P Door P/W Up SW | Front passenger door power window manual up switch signal | OFF or ON | OFF: Front passenger door power window manual up switch not being operated ON: Front passenger door power window manual up switch being operated | - |
| P Door P/W Down SW | Front passenger door power window manual down switch signal | OFF or ON | OFF: Front passenger door power window manual down switch not being operated ON: Front passenger door power window manual down switch being operated | - |
| Tester Display |
|---|
| P Door P/W Auto SW |
| P Door P/W Up SW |
| P Door P/W Down SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door) |
|
| 7. | INSPECT POWER WINDOW REGULATOR SWITCH ASSEMBLY |
(a) Remove the power window regulator switch assembly.
Click here
(b) Inspect the power window regulator switch assembly.
Click here
| NG | | REPLACE POWER WINDOW REGULATOR SWITCH ASSEMBLY |
|
| 8. | CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door)) |
(a) Disconnect the J5 power window regulator motor assembly (for front passenger door) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J3-5 (UP) or J5-10 (UP1) - Body ground | Always | 10 kΩ or higher |
| J3-4 (DOWN) or J5-7 (DWN1) - Body ground | Always | 10 kΩ or higher |
| J3-8 (AUTO) or J5-4 (AUTO) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Front Passenger Door) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 9. | READ VALUE USING TECHSTREAM (RL-DOOR MOTOR) |
(a) Enter the following menus: Body Electrical / RL-Door Motor / Data List.
(b) Read the Data List according to the display on the Techstream.
Body Electrical > RL-Door Motor > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| RL Door P/W Auto SW | Rear LH door power window auto switch signal | OFF or ON | OFF: Rear LH door power window auto up or auto down switch not being operated ON: Rear LH door power window auto up or auto down switch being operated | - |
| RL Door P/W Up SW | Rear LH door power window manual up switch signal | OFF or ON | OFF: Rear LH door power window manual up switch not being operated ON: Rear LH door power window manual up switch being operated | - |
| RL Door P/W Down SW | Rear LH door power window manual down switch signal | OFF or ON | OFF: Rear LH door power window manual down switch not being operated ON: Rear LH door power window manual down switch being operated | - |
| Tester Display |
|---|
| RL Door P/W Auto SW |
| RL Door P/W Up SW |
| RL Door P/W Down SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door) |
|
| 10. | INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Door) |
(a) Remove the rear power window regulator switch assembly (for LH door).
Click here
(b) Inspect the rear power window regulator switch assembly (for LH door).
Click here
| NG | | REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Door) |
|
| 11. | CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Door) - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)) |
(a) Disconnect the L10 power window regulator motor assembly (for rear LH door) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| L7-5 (UP) or L10-10 (UP1) - Body ground | Always | 10 kΩ or higher |
| L7-4 (DOWN) or L10-7 (DWN1) - Body ground | Always | 10 kΩ or higher |
| L7-8 (AUTO) or L10-4 (AUTO) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 12. | READ VALUE USING TECHSTREAM (RR-DOOR MOTOR) |
(a) Enter the following menus: Body Electrical / RR-Door Motor / Data List.
(b) Read the Data List according to the display on the Techstream.
Body Electrical > RR-Door Motor > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| RR Door P/W Auto SW | Rear RH door power window auto switch signal | OFF or ON | OFF: Rear RH door power window auto up or auto down switch not being operated ON: Rear RH door power window auto up or auto down switch being operated | - |
| RR Door P/W Up SW | Rear RH door power window manual up switch signal | OFF or ON | OFF: Rear RH door power window manual up switch not being operated ON: Rear RH door power window manual up switch being operated | - |
| RR Door P/W Down SW | Rear RH door power window manual down switch signal | OFF or ON | OFF: Rear RH door power window manual down switch not being operated ON: Rear RH door power window manual down switch being operated | - |
| Tester Display |
|---|
| RR Door P/W Auto SW |
| RR Door P/W Up SW |
| RR Door P/W Down SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door) |
|
| 13. | INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH Door) |
(a) Remove the rear power window regulator switch assembly (for RH door).
Click here
(b) Inspect the rear power window regulator switch assembly (for RH door).
Click here
| NG | | REPLACE REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH Door) |
|
| 14. | CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for RH Door) - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)) |
(a) Disconnect the L4 power window regulator motor assembly (for rear RH door) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| L1-5 (UP) or L4-10 (UP1) - Body ground | Always | 10 kΩ or higher |
| L1-4 (DOWN) or L4-7 (DWN1) - Body ground | Always | 10 kΩ or higher |
| L1-8 (AUTO) or L4-4 (AUTO) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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