Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: PBD Touch Sensor RH Circuit (B222B)
DESCRIPTION
This DTC is stored when the multiplex network door ECU detects a malfunction of the power back door sensor assembly RH touch sensor.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B222B | PBD Touch Sensor RH Circuit | Multiplex network door ECU detects power back door sensor assembly RH touch sensor malfunction |
|
WIRING DIAGRAM
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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.
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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 CodesOK:
DTC B222B is not output.
| OK | .gif) | USE SIMULATION METHOD TO CHECK |
|
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| 2. | READ VALUE USING TECHSTREAM |
(a) Enter the following menus: Body Electrical / Back Door / Data List.
(b) Read the Data List according to the display on the Techstream.
Body Electrical > Back Door > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| PBD Touch Sensor (Right) | Power back door sensor assembly RH signal | OFF, ON or Open | OFF: Power back door sensor assembly RH not pressed ON: Power back door sensor assembly RH pressed Open: Power back door sensor assembly RH circuit open | - |
| Tester Display |
|---|
| PBD Touch Sensor (Right) |
| Result | Proceed to |
|---|---|
| On the Techstream screen, OFF or ON is displayed accordingly | A |
| On the Techstream screen, OFF or ON is not displayed accordingly or Open is displayed for power back door sensor assembly RH | B |
| A | | REPLACE MULTIPLEX NETWORK DOOR ECU |
|
| 3. | INSPECT POWER BACK DOOR SENSOR ASSEMBLY RH |
(a) Remove the power back door sensor assembly RH.
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(b) Inspect the power back door sensor assembly RH.
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| NG | | REPLACE POWER BACK DOOR SENSOR ASSEMBLY RH |
|
| 4. | CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK DOOR ECU - POWER BACK DOOR SENSOR ASSEMBLY RH) |
(a) Disconnect the Z16 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 |
|---|---|---|
| Z16-6 (OSR) - Z14-1 (OSR) | Always | Below 1 Ω |
| Z16-24 (OSE) - Z14-2 (OSRE) | Always | Below 1 Ω |
| Z16-6 (OSR) or Z14-1 (OSR) - Body ground | Always | 10 kΩ or higher |
| Z16-24 (OSE) or Z14-2 (OSRE) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE MULTIPLEX NETWORK DOOR ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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