Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Turn Signal Light Circuit
DESCRIPTION
The combination meter assembly controls the illumination and turning off of the rear turn signal lights.
WIRING DIAGRAM
PROCEDURE
| 1. | CHECK OPERATION (REAR TURN SIGNAL LIGHTS) |
(a) Check the operation of the rear turn signal lights.
| Result | Proceed to |
|---|---|
| LH side rear turn signal light does not illuminate | A |
| RH side rear turn signal light does not illuminate | B |
| B | .gif) | GO TO STEP 5 |
|
.gif)
| 2. | CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY LH - REAR LIGHT ASSEMBLY LH) |
(a) Disconnect the S31 rear combination light assembly LH connector.
(b) Disconnect the Z21 rear light assembly LH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| S31-5 (TRN1) - Z21-4 (TRN4) | Always | Below 1 Ω |
| S31-5 (TRN1) or Z21-4 (TRN4) - Body ground | Always | 10 kΩ or higher |
| S31-6 (TRN2) - Z21-5 (TRN3) | Always | Below 1 Ω |
| S31-6 (TRN2) or Z21-5 (TRN3) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 3. | CHECK REAR COMBINATION LIGHT ASSEMBLY LH |
(a) Interchange the rear combination light assembly LH with RH and connect the connectors.
w/ Rear No. 2 Seat: Click here .gif)
w/o Rear No. 2 Seat: Click here
|
| 4. | CHECK OPERATION (REAR TURN SIGNAL LIGHTS) |
(a) Check that the rear turn signal light of the rear combination light assembly LH illuminates.
OK:
The rear turn signal light of the rear combination light assembly LH illuminates.
| OK | | REPLACE REAR LIGHT ASSEMBLY LH |
| NG | | REPLACE REAR COMBINATION LIGHT ASSEMBLY LH |
| 5. | CHECK HARNESS AND CONNECTOR (REAR COMBINATION LIGHT ASSEMBLY RH - REAR LIGHT ASSEMBLY RH) |
(a) Disconnect the S33 rear combination light assembly RH connector.
(b) Disconnect the Z20 rear light assembly RH connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| S33-5 (TRN1) - Z20-4 (TRN4) | Always | Below 1 Ω |
| S33-5 (TRN1) or Z20-4 (TRN4) - Body ground | Always | 10 kΩ or higher |
| S33-6 (TRN2) - Z20-5 (TRN3) | Always | Below 1 Ω |
| S33-6 (TRN2) or Z20-5 (TRN3) - Body ground | Always | 10 kΩ or higher |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
| 6. | CHECK REAR COMBINATION LIGHT ASSEMBLY RH |
(a) Interchange the rear combination light assembly RH with LH and connect the connectors.
w/ Rear No. 2 Seat: Click here
w/o Rear No. 2 Seat: Click here
|
| 7. | CHECK OPERATION (REAR TURN SIGNAL LIGHTS) |
(a) Check that the rear turn signal light of the rear combination light assembly RH illuminates.
OK:
The rear turn signal light of the rear combination light assembly RH illuminates.
| OK | | REPLACE REAR LIGHT ASSEMBLY RH |
| NG | | REPLACE REAR COMBINATION LIGHT ASSEMBLY RH |
Front Fog Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the front fog lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Inspect the fuses for circuits related to this system befor ...
Hazard Warning Switch Circuit
DESCRIPTION The combination meter assembly receives the hazard warning signal switch on signal and controls the operation of the hazard warning lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Steering Lock System: Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Steering Lock System DTC No. Detection Item DTC Detection Condition Note Link B2781 Open / Short in Steering Lock ECU One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is o ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Black Out Tape (for Front Door): Removal
REMOVAL CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during black out tape removal/installation are shown below. Necessary Procedures After Parts Removed/Installed/ ...
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
0.0142