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 |
|
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| 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 Owners Manual > Lexus RX (RX 350L, RX450h) 2016-2025 Owners Manual: Pictorial index
Exterior
The shape of the lights may differ depending on the grade, etc.
Side doors
Locking/unlocking
Opening/closing the side windows
Locking/unlocking by using the mechanical key
Back door
Opening from inside the cabin
Opening from outside
Outside rear view mirrors
Adjusting ...
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Can Communication System: Open in Bus 5 Main Bus Line
DESCRIPTION There may be an open circuit in one of the bus 5 main lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) of the network gateway ECU is 70 Ω or higher. Symptom Trouble Area Resistance between terminals 15 (CA5H) and 16 (CA5L) of network gateway ECU is 70 Ω or h ...
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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