Lexus NX: PBD Unit Pulse Sensor RH Circuit (B2227)

Lexus NX Service Manual / Vehicle Exterior / Door / Hatch / Power Back Door System / PBD Unit Pulse Sensor RH Circuit (B2227)

DESCRIPTION

This DTC is output when the multiplex network door ECU detects a power back door unit assembly set RH pulse malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2227

PBD Unit Pulse Sensor RH Circuit

Multiplex network door ECU detects power back door unit assembly set RH pulse malfunction

  • Multiplex network door ECU
  • Power back door unit assembly set RH
  • Harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.

Click here

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Back Door > Clear DTCs

(b) Check for DTCs.

Click here

Body Electrical > Back Door > Trouble Codes

OK:

DTC B2227 is not output

OK

USE SIMULATION METHOD TO CHECK

NG

2.

CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - POWER BACK DOOR UNIT ASSEMBLY SET RH)

(a) Disconnect the Y26 multiplex network door ECU connector.

(b) Disconnect the Y18 power back door unit assembly set RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y26-19 (DSG2) - Y18-4 (DSG2)

Always

Below 1 Ω

Y26-5 (DSV2) - Y18-3 (DSV2)

Always

Below 1 Ω

Y26-4 (DS22) - Y18-6 (DS22)

Always

Below 1 Ω

Y26-3 (DS12) - Y18-5 (DS12)

Always

Below 1 Ω

Y26-19 (DSG2) or Y18-4 (DSG2) - Body ground

Always

10 kΩ or higher

Y26-5 (DSV2) or Y18-3 (DSV2) - Body ground

Always

10 kΩ or higher

Y26-4 (DS22) or Y18-6 (DS22) - Body ground

Always

10 kΩ or higher

Y26-3 (DS12) or Y18-5 (DS12) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

CHECK MULTIPLEX NETWORK DOOR ECU

(a) Disconnect the power back door unit assembly set RH connector.

*a

Front view of wire harness connector

(to Power Back Door Unit Assembly Set RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y18-4 (DSG2) - Body ground

Always

Below 1 Ω

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

Y18-5 (DS12) - Body ground

Always

7 V or higher

Y18-6 (DS22) - Body ground

Always

7 V or higher

Y18-3 (DSV2) - Body ground

Always

7 V or higher

NG

REPLACE MULTIPLEX NETWORK DOOR ECU

OK

4.

CHECK POWER BACK DOOR UNIT ASSEMBLY SET RH

(a) Using an oscilloscope, check the waveform of each terminal from the rear of the multiplex network door ECU Y26 connector.

*a

Component with harness connected

(Multiplex Network Door ECU)

*b

Waveform (CH1)

*c

Waveform (CH2)

-

-

Measurement Condition:

Item

Condition

Tester Connection

  • CH1 : Y26-3 (DS12) - Body ground
  • CH2 : Y26-4 (DS22) - 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 to the speed at which the back door is opened and closed by hand.

OK:

The waveform displayed is as shown in the illustration.

OK

REPLACE MULTIPLEX NETWORK DOOR ECU

NG

REPLACE POWER BACK DOOR UNIT ASSEMBLY SET RH

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