DTC B2325: LIN Communication Bus Malfunction: Procedure

1. Remove the instrument panel junction block assembly. Refer to REMOVAL .
   Fig 1: Inspecting Instrument Panel Junction Block Assembly

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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
   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)

NG → See step   5 

OK: Go to next step 

1. Disconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector*.
2. Disconnect the K9 power window regulator motor (for driver side) connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3B-30 (LIN2) - K9-9 (LIN)	Always	Below 1 Ω
   3B-30 (LIN2) - S4-11 (MPX1)*	Always	Below 1 Ω
   K9-9 (LIN) - Body ground	Always	10 kΩ or higher
   S4-11 (MPX1)* - Body ground	Always	10 kΩ or higher

   • *: w/ Sliding Roof System

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the 3B instrument panel junction block assembly.
2. Reconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector*.
3. Clear the DTC. Refer to DTC CHECK / CLEAR .
4. After 10 seconds have elapsed, check if the trouble occurs again.
5. Check for DTCs again.
   • *: w/ Sliding Roof System

   Result

   Result	Proceed to
   DTC B2325 is output (w/ Sliding Roof System)	A
   DTC B2325 is output (w/o Sliding Roof System)	B
   DTC B2325 is not output	C

B → See step   8 

C → See step   7 

A: Go to next step 

1. Reconnect the K9 power window regulator motor (for driver side) connector.
2. Disconnect the S4 sliding roof ECU (sliding roof drive gear sub-assembly) connector*.
3. Clear the DTC. Refer to DTC CHECK / CLEAR .
4. After 10 seconds have elapsed, check if the trouble occurs again.
5. Check for DTCs again.
   • *: w/ Sliding Roof System

   Result

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

B → See step   6 

A → See step   8