DTC B2321: Driver Side Door ECU Communication Stop [08/2015 - ]: Procedure

1. Clear the DTC. Refer to DTC CHECK / CLEAR [08/2015 - ] .
2. Recheck for DTCs.

   Result

   Result	Proceed to
   Only DTC B2321 is output.	A
   DTC B1206 and B2321 are output simultaneously.	B

   HINT: 

   When DTC B1206 and B2321 are output simultaneously, perform troubleshooting for DTC B1206 first.

B → See step   9 

A: Go to next step 

1. Disconnect the K11 power window regulator master switch assembly connector.
2. Disconnect the K9 power window regulator motor (for driver door) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K11-7 (LIN2) - K9-9 (LIN)	Always	Below 1 Ω
   K11-7 (LIN2) or K9-9 (LIN) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the power window regulator master switch assembly. Refer to REMOVAL [08/2015 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   7 (LIN2) - 6 (LIN1)	Always	Below 1 Ω
   7 (LIN2) or 6 (LIN1) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Power Window Regulator Master Switch Assembly)

NG → See step   7 

OK: Go to next step 

1. Disconnect the K9 power window regulator motor (for driver door) connector.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   K9-2 (B) - Body ground	Always	11 to 14 V

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K9-1 (GND) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the power window regulator motor assembly (for driver door). Refer to REMOVAL [08/2015 - ] .

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR [08/2015 - ] .
2. Check for DTCs.

   OK

   DTC B2321 is not output.

NG → See step   8 

OK → END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (FOR DRIVER DOOR) WAS DEFECTIVE)