Lexus NX: Back Door Motor Circuit (B2220)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2220

Back Door Motor Circuit

Motor malfunction detected in power back door unit assembly set LH or RH

  • Multiplex network door ECU
  • Power back door unit assembly set LH
  • 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.

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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 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 (BD+) - Body ground

Always

10 kΩ or higher

2 (BD-) - Body ground

Always

10 kΩ or higher

1 (BD+) - 2 (BD-)

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 (BD+2) - Body ground

Always

10 kΩ or higher

2 (BD-2) - Body ground

Always

10 kΩ or higher

1 (BD+2) - 2 (BD-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 Y27 multiplex network door ECU connector.

(b) Disconnect the Y19 power back door unit assembly set LH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Y27-7 (BD+) - Y19-1 (BD+)

Always

Below 1 Ω

Y27-6 (BD-) - Y19-2 (BD-)

Always

Below 1 Ω

Y27-7 (BD+) or Y19-1 (BD+) - Body ground

Always

10 kΩ or higher

Y27-6 (BD-) or Y19-2 (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) Disconnect the Y27 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

Y27-8 (BD+2) - Y18-1 (BD+2)

Always

Below 1 Ω

Y27-9 (BD-2) - Y18-2 (BD-2)

Always

Below 1 Ω

Y27-8 (BD+2) or Y18-1 (BD+2) - Body ground

Always

10 kΩ or higher

Y27-9 (BD-2) or Y18-2 (BD-2) - Body ground

Always

10 kΩ or higher

OK

REPLACE MULTIPLEX NETWORK DOOR ECU

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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