Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Back Door Motor Circuit (B2220)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Vehicle Exterior / Door / Hatch / Power Back Door System (w/ Outside Door Control Switch) / Back Door Motor Circuit (B2220)

DESCRIPTION

This DTC is stored when the multiplex network door ECU detects a malfunction of the motor built-into the power back door unit assembly set LH or power back door unit assembly set RH.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2220

Back Door Motor Circuit

Malfunction of motor built into the power back door unit assembly set LH or power back door unit assembly set RH detected
  • Multiplex network door ECU
  • Power back door unit assembly set LH
  • Power back door unit assembly set RH
  • Wire harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

If the multiplex network door ECU has been removed and installed or replaced, or if any of the connectors have been disconnected, initialize the power back door system.

Click here

PROCEDURE

1.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Back Door / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > Back Door > Clear DTCs

(f) Recheck for DTCs.

Body Electrical > Back Door > Trouble Codes

OK:

DTC B2220 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

2.

INSPECT POWER BACK DOOR UNIT ASSEMBLY SET LH

(a) Fully open the back door.

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

*a

Component without harness connected

(Power Back Door Unit Assembly Set LH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 - Body ground

Always

10 kΩ or higher

2 - Body ground

Always

10 kΩ or higher

1 - 2

Always

Below 1 MΩ
NG

REPLACE POWER BACK DOOR UNIT ASSEMBLY SET LH

OK

3.

INSPECT POWER BACK DOOR UNIT ASSEMBLY SET RH

(a) Fully open the back door.

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

*a

Component without harness connected

(Power Back Door Unit Assembly Set RH)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 - Body ground

Always

10 kΩ or higher

2 - Body ground

Always

10 kΩ or higher

1 - 2

Always

Below 1 MΩ
NG

REPLACE POWER BACK DOOR UNIT ASSEMBLY SET RH

OK

4.

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

(a) Disconnect the Z17 multiplex network door ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Z17-7 (BD+) - Z18-1 (BD+)

Always

Below 1 Ω

Z17-6 (BD-) - Z18-2 (BD-)

Always

Below 1 Ω

Z17-7 (BD+) or Z18-1 (BD+) - Body ground

Always

10 kΩ or higher

Z17-6 (BD-) or Z18-2 (BD-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Z17-8 (BD+2) - Z19-1 (BD+2)

Always

Below 1 Ω

Z17-9 (BD-2) - Z19-2 (BD-2)

Always

Below 1 Ω

Z17-8 (BD+2) or Z19-1 (BD+2) - Body ground

Always

10 kΩ or higher

Z17-9 (BD-2) or Z19-2 (BD-2) - Body ground

Always

10 kΩ or higher
OK

REPLACE MULTIPLEX NETWORK DOOR ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
    Kick Sensor Circuit (B2205)
    DESCRIPTION B2205 is output when the multiplex network door ECU detects that the kick door control sensor is stuck on. DTC No. Detection Item DTC Detection Condition Trouble Area B2205 ...

    PBD Unit Pulse Sensor LH Circuit (B2226)
    DESCRIPTION This DTC is stored when the multiplex network door ECU detects an error in the power back door unit assembly set LH pulse signal. DTC No. Detection Item DTC Detection Condition Tr ...

    Other materials:

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Power Seat Switch(w/ Seat Position Memory System): Removal
    REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during position control ECU and switch assembly LH removal/installation are shown below. Necessary Procedures A ...

    Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Parking Assist Monitor System: How To Proceed With Troubleshooting
    CAUTION / NOTICE / HINT HINT: Use the following procedure to troubleshoot the parking assist monitor system. *: Use the Techstream. PROCEDURE 1. VEHICLE BROUGHT TO WORKSHOP NEXT 2. CUSTOMER PROBLEM ANALYSIS (a) Ask the customer about the problems and the co ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

    © 2025 Copyright www.lexusrx.net
    0.018