Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual: Engine Switch Illumination Circuit
DESCRIPTION
The illuminated entry system controls the engine switch illumination.
WIRING DIAGRAM
PROCEDURE
| 1. | PERFORM ACTIVE TEST 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 / Smart Access / Active Test.
(e) Perform the Active Test according to the display on the Techstream.
Body Electrical > Smart Access > Active Test| Tester Display | Measurement Item | Control Range | Diagnostic Note |
|---|---|---|---|
| Power/Engine SW Light | Engine switch illumination | OFF or ON | When performing this Active Test, make sure the following condition is met: The engine switch illumination is off (15 seconds or more have elapsed since it turned from on to off) and the engine switch is on (ACC) or on (IG), or the engine is running. |
| Tester Display |
|---|
| Power/Engine SW Light |
OK:
Engine switch illumination comes on.
| OK | .gif) | PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
.gif)
| 2. | INSPECT ENGINE SWITCH |
(a) Remove the engine switch.
Click here .gif)
(b) Inspect the engine switch.
Click here
OK:
Engine switch illumination is normal.
| NG | | REPLACE PUSH START SWITCH |
|
| 3. | CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)) |
(a) Disconnect the J41 certification ECU (smart key ECU assembly) connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| J14-9 (SWIL) - J41-10 (SWIL) | Always | Below 1 Ω |
| J14-6 (AGND) - J41-11 (AGND) | Always | Below 1 Ω |
| J14-9 (SWIL) or J41-10 (SWIL) - Body ground | Always | 10 kΩ or higher |
| J14-6 (AGND) or J41-11 (AGND) - Body ground | Always | 10 kΩ or higher |
| OK | | REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
Ambient Illumination Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the ambient illumination lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE:
Inspect the lights for circuits related to this ...
Door Unlock Detection Switch Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) detects the condition of each door unlock detection switch. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Before replacing the main body EC ...
Other materials:
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Smart Access System With Push-button Start (for Entry Function): Operation Check
OPERATION CHECK CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) OPERATION NOTICE: Make sure that the smart access system with push-button start (for Entry Function) has not been canceled before performing this inspection. (a) Check the entry unlock function (driver door, front ...
Lexus RX (RX 350L, RX450h) 2016-2026 Repair Manual > Power Window Control System: Key-off Operation Function Operates even if Operating Conditions are not Satisfied
DESCRIPTION When the front doors are closed, each power window regulator motor assembly can be operated for approximately 45 seconds after the engine switch is turned from on (IG) to off by receiving operation permission signals from the main body ECU (multiplex network body ECU). However, when appr ...
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
0.013