DESCRIPTION
The ECM sends the reverse signal to the main body ECU (multiplex network body ECU) via CAN communication. When receiving the reverse signal, the main body ECU (multiplex network body ECU) sends the reverse request signal to each outer mirror control ECU assembly. Based on the signal, each outer mirror control ECU assembly then performs control.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
HINT:
The reverse shift-linked function will not activate when both the mirror select switch L and R switch are off.
PROCEDURE
1. | CHECK MEMORY AND REACTIVATION FUNCTION |
(a) Turn the engine switch on (IG). |
|
(b) Using the multiplex network master switch assembly, turn the mirror surface to the fully left position.
(c) Press the M1 switch while the SET switch is being pressed.
(d) Check that the buzzer sounds for 0.5 seconds and the mirror surface position is memorized.
(e) Using the multiplex network master switch assembly, turn the mirror surface to the fully right position.
(f) Press the M1 switch.
(g) Check that the buzzer sounds for 0.1 seconds and the outer mirror automatically moves to the memorized fully left position.
Result | Proceed to |
---|---|
Memory and reactivation functions are normal | A |
Memory function is not normal | B |
Reactivation function is not normal | C |
B | ![]() | GO TO OTHER DIAGNOSTIC PROCEDURE (Power Mirror Surface Position is not Memorized) |
C | ![]() | GO TO OTHER DIAGNOSTIC PROCEDURE (Power Mirrors do not Return to Memorized Position) |
|
2. | CHECK FOR DTC |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / DTC.
(e) Check if SFI system DTCs are output.
Powertrain > Engine > Trouble CodesOK:
SFI system DTCs are not output.
NG | ![]() | GO TO SFI SYSTEM |
|
3. | CHECK COMBINATION METER ASSEMBLY |
(a) Check if the shift position indicator light in the combination meter assembly operates normally.
OK:
Shift position indicator light indicates the actual shift position correctly.
NG | ![]() | GO TO METER / GAUGE SYSTEM |
|
4. | CHECK REVERSE SHIFT-LINKED FUNCTION |
(a) Turn the engine switch on (IG). |
|
(b) Turn the mirror select switch R or L switch on.
(c) Check that the mirror surface turns downward when the shift lever is moved to R.
Result | Proceed to |
---|---|
Reverse shift-linked functions on both mirrors are not normal | A |
Reverse shift-linked function on driver door is not normal | B |
Reverse shift-linked function on front passenger door is not normal | C |
B | ![]() | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR) |
C | ![]() | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER DOOR) |
|
5. | 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 / Master Switch / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Master Switch > Data List Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
---|---|---|---|---|
Mirror Selection SW (L) | Mirror select switch signal for LH mirror | OFF or ON | OFF: Mirror select switch off ON: Mirror select switch L switch on | - |
Mirror Selection SW (R) | Mirror select switch signal for RH mirror | OFF or ON | OFF: Mirror select switch off ON: Mirror select switch R switch on | - |
Tester Display |
---|
Mirror Selection SW (L) |
Mirror Selection SW (R) |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
OK | ![]() | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
NG | ![]() | REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY |
Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual > Meter / Gauge System: Engine Coolant Temperature Receiver Gauge Malfunction
DESCRIPTION In this circuit, the combination meter assembly receives engine coolant temperature signals from the ECM via CAN communication. The combination meter assembly displays the engine coolant temperature that is calculated based on the data received from the ECM. WIRING DIAGRAM CAUTION / NOT ...
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 ...