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 |
Daytime Running Light Relay Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the daytime running lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Inspect the fuses for circuits related to this system ...
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 > Audio And Visual System (for 8 Inch Display): Mute Signal Circuit between Radio Receiver and Stereo Component Amplifier
DESCRIPTION This circuit sends a signal to the stereo component amplifier assembly to mute noise. Due to this, the noise produced by changing the sound source ceases. If there is an open in the circuit, noise can be heard from the speakers when changing the sound source. If there is a short in the c ...
Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual > Maintenance: Maintenance
requirements
To ensure safe and economical driving, day-to-day care and regular
maintenance
are essential. It is the owner's responsibility to perform regular checks.
Lexus recommends the following maintenance:
General maintenance
General maintenance should be performed on a daily basis. This can be done ...
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
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