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 |
|
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.
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(b) Check for DTCs.
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OK:
DTC B2220 is not output
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
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| 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. |
|
(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 |
|
| 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. |
|
(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 |
|
| 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 |
|
| 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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PBD Unit Pulse Sensor LH Circuit (B2226)
DESCRIPTION This DTC is output when the multiplex network door ECU detects a power back door unit assembly set LH pulse malfunction. DTC No. Detection Item DTC Detection Condition Trouble Are
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 Are
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DESCRIPTION This DTC is output when the multiplex network door ECU detects a power back door sensor assembly LH touch sensor malfunction. DTC No. Detection Item DTC Detection Condition Troubl
SEE MORE:
Installation
INSTALLATION PROCEDURE 1. INSTALL RADIO SETTING CONDENSER (a) Attach the claw to install a new terminal cover to the wire harness. NOTICE:
Make sure to hold the crimping side of the terminal when installing the wire harness to the terminal cover.
Make sure not to bend the exposed wire when
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspe
