DTC B2226: PBD Unit Pulse Sensor LH Circuit [12/2019 - 11/2023]: Procedure

1. Clear the DTCs.

   Body Electrical > Back Door > Clear DTCs 

2. Recheck for DTCs.

   Body Electrical > Back Door > Trouble Codes 

   OK

   DTC B2226 is not output.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

USE SIMULATION METHOD TO CHECK 

Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

Result: 

NG 

See step  2

1. Disconnect the W18 multiplex network door ECU connector.
2. Disconnect the W21 power back door unit assembly set LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   W18-21 (DSG) - W21-4 (DSG)	Always	Below 1 Ω
   W18-25 (DSV) - W21-3 (DSV)	Always	Below 1 Ω
   W18-2 (DS2) - W21-6 (DS2)	Always	Below 1 Ω
   W18-1 (DS1) - W21-5 (DS1)	Always	Below 1 Ω
   W18-21 (DSG) or W21-4 (DSG) - Body ground	Always	10 kΩ or higher
   W18-25 (DSV) or W21-3 (DSV) - Body ground	Always	10 kΩ or higher
   W18-2 (DS2) or W21-6 (DS2) - Body ground	Always	10 kΩ or higher
   W18-1 (DS1) or W21-5 (DS1) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  3

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Reconnect the W18 multiplex network door ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Power Back Door Unit Assembly Set LH)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   W21-4 (DSG) - Body ground	Always	Below 1 Ω

4. Connect the cable to the negative (-) auxiliary battery terminal.
5. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   W21-5 (DS1) - Body ground	Always	7 V or higher
   W21-6 (DS2) - Body ground	Always	7 V or higher
   W21-3 (DSV) - Body ground	Always	7 V or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE MULTIPLEX NETWORK DOOR ECU 

Refer to REMOVAL [12/2019 - 11/2023]

Result: 

OK 

See step  4

1. Reconnect the W21 power back door unit assembly set LH connector.
2. Using an oscilloscope, check the waveform of each terminal from the rear of the W18 multiplex network door ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Multiplex Network Door ECU)	*b	Waveform (CH1)
   *c	Waveform (CH2)	-	-

   Measurement Condition

   Item	Condition
   Tester Connection	CH1: W18-1 (DS1) - Body ground CH2: W18-2 (DS2) - Body ground
   Tool setting	2 V/DIV., 2 ms/DIV.
   Vehicle condition	Open and close the back door by hand.

   HINT: 

   The period changes in accordance with the speed at which the back door is opened and closed by hand.

   OK

   The waveform displayed is as shown in the illustration.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU 

Refer to REMOVAL [12/2019 - 11/2023]

Result: 

NG 

REPLACE POWER BACK DOOR UNIT ASSEMBLY SET LH 

Refer to REMOVAL [12/2019 - ]