Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Jam Protection Function Activates During Power Back Door Operation
DESCRIPTION
If the jam protection function activates during power back door operation, one of the following may be the cause: 1) improper fit of back door or a foreign object stuck in the back door, 2) malfunction in the power back door sensor assembly circuit or 3) multiplex network door ECU malfunction.
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 .gif)
PROCEDURE
| 1. | CHECK POWER BACK DOOR SYSTEM |
(a) Check if there are any foreign objects interfering with back door operation.
| Result | Proceed to |
|---|---|
| There are no foreign objects | A |
| There are foreign objects | B |
| B | .gif) | REMOVE FOREIGN OBJECT |
|
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| 2. | CHECK BACK DOOR OPERATION |
(a) Check back door operation.
(1) Set the customize setting "System Settings" on the multi-information display to OFF.
Click here
NOTICE:
This check is possible only when the "System Settings" customize setting is set to OFF on the multi-information display in the combination meter assembly. (The default setting is ON.)
(2) Open/close the back door by hand.
| Result | Proceed to |
|---|---|
| The back door fully opens and closes smoothly | A |
| The back door does not fully open and close smoothly | B |
(b) Set the customize setting "System Settings"" on the multi-information display to ON.
Click here
NOTICE:
The "System Settings" customize setting is set to ON on the multi-information display in the combination meter assembly must be set to ON for the power back door system to operate.
| B | | ADJUST BACK DOOR |
|
| 3. | READ VALUE USING TECHSTREAM (PBD TOUCH SENSOR) |
(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 / Data List.
(e) 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 | - |
| PBD Touch Sensor (Left) | Power back door sensor assembly LH signal | OFF, ON or Open | OFF: Power back door sensor assembly LH not pressed ON: Power back door sensor assembly LH pressed Open: Power back door sensor assembly LH circuit open | - |
| Tester Display |
|---|
| PBD Touch Sensor (Right) |
| PBD Touch Sensor (Left) |
| 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 |
| On the Techstream screen, OFF or ON is not displayed accordingly or Open is displayed for power back door sensor assembly LH | C |
| B | | GO TO STEP 6 |
| C | | GO TO STEP 8 |
|
| 4. | REPLACE POWER BACK DOOR UNIT ASSEMBLY SET |
(a) Replace the power back door unit assembly set with a new or known good one.
Click here
|
| 5. | CHECK POWER BACK DOOR SYSTEM |
(a) Check the power back door system operation.
Click here
OK:
Power back door system operates normally
| OK | | END (POWER BACK DOOR UNIT ASSEMBLY SET WAS MALFUNCTIONING) |
| NG | | REPLACE MULTIPLEX NETWORK DOOR ECU |
| 6. | INSPECT POWER BACK DOOR SENSOR ASSEMBLY RH |
(a) Remove the power back door sensor assembly RH.
Click here
(b) Inspect the power back door sensor assembly RH.
Click here
| NG | | REPLACE POWER BACK DOOR SENSOR ASSEMBLY RH |
|
| 7. | CHECK HARNESS AND CONNECTOR (POWER BACK DOOR SENSOR ASSEMBLY RH - MULTIPLEX NETWORK DOOR ECU) |
(a) Disconnect the Z14 power back door sensor assembly RH connector.
(b) Disconnect the Z16 multiplex network door ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Z14-1 (OSR) - Z16-6 (OSR) | Always | Below 1 Ω |
| Z14-2 (OSRE) - Z16-24 (OSE) | Always | Below 1 Ω |
| Z14-1 (OSR) or Z16-6 (OSR) - Body ground | Always | 10 kΩ or higher |
| Z14-2 (OSRE) or Z16-24 (OSE) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE MULTIPLEX NETWORK DOOR ECU |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
| 8. | INSPECT POWER BACK DOOR SENSOR ASSEMBLY LH |
(a) Remove the power back door sensor assembly LH.
Click here
(b) Inspect the power back door sensor assembly LH.
Click here
| NG | | REPLACE POWER BACK DOOR SENSOR ASSEMBLY LH |
|
| 9. | CHECK HARNESS AND CONNECTOR (POWER BACK DOOR SENSOR ASSEMBLY LH - MULTIPLEX NETWORK DOOR ECU) |
(a) Disconnect the Z3 power back door sensor assembly LH connector.
(b) Disconnect the Z16 multiplex network door ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| Z3-1 (OSL) - Z16-26 (OSL) | Always | Below 1 Ω |
| Z3-2 (OSLE) - Z16-24 (OSE) | Always | Below 1 Ω |
| Z3-1 (OSL) or Z16-26 (OSL) - Body ground | Always | 10 kΩ or higher |
| Z3-2 (OSLE) or Z16-24 (OSE) - 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} Repair Manual
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