DTC B2324: Rear Door LH ECU Communication Stop: Procedure

1. Remove the instrument panel junction block assembly. Refer to REMOVAL .
   Fig 1: Identifying 2D Instrument Panel Junction Block Assembly & MB Instrument Panel Junction Block Assembly

   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
   2D-26 (LIN2) - MB-16 (LIN2)	Always	Below 1 Ω
   2D-26 (LIN2) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1

   Component without harness connected (Instrument Panel Junction Block Assembly)

   *2

   Component without harness connected (Instrument Panel Junction Block Assembly)

NG → See step   6 

OK: Go to next step 

1. Disconnect the Q4 power window regulator motor assembly (for rear LH side) connector.
   Fig 2: Identifying Instrument Panel Junction Block And Power Window Regulator Motor Connector Terminals

   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
   2D-26 (LIN2) - Q4-9 (LIN)	Always	Below 1 Ω
   2D-26 (LIN2) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness or connector (to Instrument Panel Junction Block Assembly)
   *2	Front view of wire harness connector (to Power Window Regulator Motor Assembly (for Rear LH Side))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Measure the voltage according to the value(s) in the table below.
   Fig 3: Identifying Power Window Regulator Motor Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   Q4-2 (B) - Body ground	Power switch off	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   Q4-1 (GND) - Body ground	Always	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness or connector (to Power Window Regulator Motor Assembly (for Rear LH Side))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Replace the power window regulator motor assembly (for rear LH side). Refer to REMOVAL .

NEXT: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Check for DTCs.

   OK

   DTC B2324 is not output.

NG → See step   7 

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