Rear Side Switch Module LIN Communication Malfunction: Procedure

1. Clear the DTC. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Check for DTC. Refer to DTC CHECK / CLEAR .
   RESULT:
   
   

   Result	Proceed to
   DTC U0211, U0246, U1130 and U1131 output occurs	A
   DTC U0211, U0246, U1130 or U1131 output occurs	B
   No DTC output occurs	C

C → See step   13 

B → See step   12 

A: Go to next step 

1. Disconnect the z54*1 or S15*2 module switch connectors.
   Fig 1: Identifying Connectors Z54, S15 & F25

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the f25 ECU connector.
3. Measure the resistance and voltage according to the value(s) in the table below.

   Standard resistance

   EXCEPT OTTOMAN:
   
   

   Tester Connection	Condition	Specified Condition
   z54-6 (LIN) - f25-7 (LIN)	Always	Below 1 Ω
   z54-6 (LIN) or f25-7 (LIN) - Body ground	Always	10 kΩ or higher

   FOR OTTOMAN:
   
   

   Tester Connection	Condition	Specified Condition
   S15-3 (LIN) - f25-7 (LIN)	Always	Below 1 Ω
   S15-3 (LIN) or f25-7 (LIN) - Body ground	Always	10 kΩ or higher

   Standard voltage

   EXCEPT OTTOMAN:
   
   

   Tester Connection	Condition	Specified Condition
   z54-6 (LIN) or f25-7 (LIN) - Body ground	Always	Below 1 V

   FOR OTTOMAN:
   
   

   Tester Connection	Condition	Specified Condition
   S15-3 (LIN) or f25-7 (LIN) - Body ground	Always	Below 1 V

NG → See step   4 

OK → See step   14 

1. Reconnect the z54*1 or S15*2 module switch connectors.

   HINT: 

   *1: except Ottoman

   *2: for Ottoman

2. Clear the DTC. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Disconnect the f5 ECU connector.
2. Recheck for DTC. Refer to DTC CHECK / CLEAR .
   RESULT:
   
   

   Result	Proceed to
   DTC U0211 ,U0246, U1130 and U1131 output occurs	A
   DTC U0211 output occurs	B

B → See step   15 

A: Go to next step 

1. Reconnect the f5 ECU connector.
2. Clear the DTC. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Disconnect the f25 ECU connector.
2. Recheck for DTC. Refer to DTC CHECK / CLEAR .
   RESULT:
   
   

   Result	Proceed to
   DTC U0211, U0246, U1130 and U1131 output occurs	A
   DTC U0246 output occurs	B

B → See step   16 

A: Go to next step 

1. Reconnect the f25 ECU connector.
2. Clear the DTC. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Disconnect the f8 ECU connector.
2. Recheck for DTC. Refer to DTC CHECK / CLEAR .
   RESULT:
   
   

   Result	Proceed to
   DTC U0211, U0246, U1130 and U1131 output occurs	A
   DTC U1130 output occurs	B

B → See step   17 

A: Go to next step 

1. Reconnect the f8 ECU connector.
2. Clear the DTC. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Disconnect the f13*1 or f28*2 ECU connector.
2. Recheck for DTC. Refer to DTC CHECK / CLEAR .
   RESULT:
   
   

   Result	Proceed to
   DTC U0211, U0246, U1130 and U1131 output occurs	A
   DTC U1131 output occurs	B

   HINT: 

   • *1: w/o Climate Control Seat System
   • *2: w/ Climate Control Seat System

B → See step   18 

A → REPAIR OR REPLACE HARNESS OR CONNECTOR