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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Removal
REMOVAL CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH and LH sides.
The procedure listed below is for the LH side.
PROCEDURE 1. PRECAUTION NOTICE: After the power switch off is turned off, there may be a waiting time before disconnecting the auxiliary negative (-) battery t
