DTC B2325: LIN Communication Bus Malfunction [08/2013 - ]: Procedure

1. Disconnect the M4 multiplex network master switch connector.
2. Disconnect the M8 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
   M4-16 (LIN2) - M8-9 (LIN)	Always	Below 1 Ω
   M4-16 (LIN2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Remove the multiplex network master switch assembly. Refer to REMOVAL [08/2013 - ] .

   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
   16 (LIN2) - 17 (LIN1)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Multiplex Network Master Switch Assembly)

NG → See step   14 

OK: Go to next step 

1. Remove the instrument panel junction block assembly. Refer to REMOVAL [08/2013 - ] .

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   HINT: 

   This inspection is to check the LIN 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
   3C-26 (LIN2) - MB-16 (LIN2)	Always	Below 1 Ω
   3B-30 (LIN2) - MB-16 (LIN2)	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Instrument Panel Junction Block Assembly)	*b	Component without harness connected (Instrument Panel Junction Block Assembly)
   *c	Component without harness connected (Instrument Panel Junction Block Assembly)	-	-

NG → See step   11 

OK: Go to next step 

1. Disconnect the L9 power window regulator motor assembly (for front passenger door) connector.
2. Disconnect the M4 multiplex network master switch assembly connector.
3. Disconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
4. Disconnect the N2 power window regulator motor assembly (for rear RH door) connector.
5. Disconnect the O2 power window regulator motor assembly (for rear LH door) connector.
6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3C-26 (LIN2) - O2-9 (LIN)	Always	Below 1 Ω
   3B-30 (LIN2) - N2-9 (LIN)	Always	Below 1 Ω
   3B-30 (LIN2) - M4-17 (LIN1)	Always	Below 1 Ω
   3B-30 (LIN2) - L9-9 (LIN)	Always	Below 1 Ω
   3B-30 (LIN2) - T4-11 (MPX1)	Always	Below 1 Ω
   3C-26 (LIN2) - Body ground	Always	10 kΩ or higher
   3B-30 (LIN2) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the M4 multiplex network master switch assembly connector.
2. Reconnect the 3B and 3C instrument panel junction block assembly connector.
3. Reconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
4. Reconnect the N2 power window regulator motor assembly (for rear RH door) connector.
5. Reconnect the M8 power window regulator motor assembly (for driver door) connector.
6. Reconnect the L9 power window regulator motor assembly (for front passenger door) connector.
7. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
8. After 10 seconds have elapsed, check if the trouble occurs again.
9. Check for DTCs again.

   Result

   Result	Proceed to
   DTC B2325 is output	A
   DTC B2325 is not output	B

B → See step   12 

A: Go to next step 

1. Reconnect the O2 power window regulator motor assembly (for rear LH door) connector.
2. Disconnect the M4 multiplex network master switch assembly connector.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
4. After 10 seconds have elapsed, check if the trouble occurs again.
5. Check for DTCs again.

   Result

   Result	Proceed to
   DTC B2325 is output	A
   DTC B2325 is not output	B

B → See step   14 

A: Go to next step 

1. Reconnect the M4 multiplex network master switch assembly connector.
2. Disconnect the N2 power window regulator motor assembly (for rear RH door) connector.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
4. After 10 seconds have elapsed, check if the trouble occurs again.
5. Check for DTCs again.

   Result

   Result	Proceed to
   DTC B2325 is output	A
   DTC B2325 is not output	B

B → See step   15 

A: Go to next step 

1. Reconnect the N2 power window regulator motor assembly (for rear RH door) connector.
2. Disconnect the M8 power window regulator motor assembly (for driver door) connector.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
4. After 10 seconds have elapsed, check if the trouble occurs again.
5. Check for DTCs again.

   Result

   Result	Proceed to
   DTC B2325 is output	A
   DTC B2325 is not output	B

B → See step   16 

A: Go to next step 

1. Reconnect the M8 power window regulator motor assembly (for driver door) connector.
2. Disconnect the L9 power window regulator motor assembly (for front passenger door) connector.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
4. After 10 seconds have elapsed, check if the trouble occurs again.
5. Check for DTCs again.

   Result

   Result	Proceed to
   DTC B2325 is output	A
   DTC B2325 is not output	B

B → See step   17 

A: Go to next step 

1. Reconnect the L9 power window regulator motor assembly (for front passenger door) connector.
2. Disconnect the T4 sliding roof ECU (sliding roof drive gear sub-assembly) connector.
3. Clear the DTCs. Refer to DTC CHECK / CLEAR [08/2013 - ] .
4. After 10 seconds have elapsed, check if the trouble occurs again.
5. Check for DTCs again.

   Result

   Result	Proceed to
   DTC B2325 is output	A
   DTC B2325 is not output	B

B → See step   13 

A → See step   18