Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Turn Signal Switch Circuit
DESCRIPTION
The combination meter assembly receives the turn signal switch information and controls the turn signal lights.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
PROCEDURE
| 1. | READ VALUE USING TECHSTREAM |
(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 / Combination Meter / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Combination Meter > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Turn Signal Switch (Right) | Turn signal switch (right) signal | OFF or ON | OFF: Turn signal switch not in right turn position ON: Turn signal switch in right turn position | - |
| Turn Signal Switch (Left) | Turn signal switch (left) signal | OFF or ON | OFF: Turn signal switch not in left turn position ON: Turn signal switch in left turn position | - |
| Turn Switch Signal (Full Turn) | Turn signal switch (full turn) signal | OFF or ON | OFF: Turn signal switch not in left or right turn position ON: Turn signal switch in left or right turn position | - |
| Tester Display |
|---|
| Turn Signal Switch (Right) |
| Turn Signal Switch (Left) |
| Turn Switch Signal (Full Turn) |
OK:
Normal conditions listed above are displayed.
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
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| 2. | INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY |
(a) Remove the headlight dimmer switch assembly.
Click here .gif)
(b) Inspect the headlight dimmer switch assembly.
Click here
| NG | | REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY |
|
| 3. | CHECK HARNESS AND CONNECTOR (HEADLIGHT DIMMER SWITCH ASSEMBLY - COMBINATION METER ASSEMBLY AND BODY GROUND) |
(a) Disconnect the J11 combination meter assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J28-12 (TR) - J11-3 (ER) | Always | Below 1 Ω |
| J28-11 (TL) - J11-4 (EL) | Always | Below 1 Ω |
| J28-13 (CR) - J11-8 (SW) | Always | Below 1 Ω |
| J28-12 (TR) or J11-3 (ER) - Body ground | Always | 10 kΩ or higher |
| J28-11 (TL) or J11-4 (EL) - Body ground | Always | 10 kΩ or higher |
| J28-13 (CR) or J11-8 (SW) - Body ground | Always | 10 kΩ or higher |
| J28-15 (EL) - Body ground | Always | Below 1 Ω |
| OK | | REPLACE COMBINATION METER ASSEMBLY |
| 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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