Lexus ES: Power Mirrors do not Return to Memorized Position
DESCRIPTION
If any of the M1, M2 or M3 seat memory switch is pressed, the outer mirror control ECU assembly (driver door) detects the switch operation and sends the seat memory switch signal to the main body ECU (multiplex network body ECU) via CAN communication. The main body ECU (multiplex network body ECU) sends the reproduction signal to each outer mirror control ECU assembly via CAN communication. When receiving the reproduction signal, each outer mirror control ECU assembly operates the vertical and horizontal mirror motors, which are built into the outer rear view mirror assembly, to adjust the mirror surface to the stored position.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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The power mirror control system (w/ Memory) uses the CAN communication system. Inspect the communication functions by following How to Proceed with Troubleshooting. Troubleshoot the power mirror control system (w/ Memory) after confirming that the communication systems are functioning properly.
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Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
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PROCEDURE
| 1. | CHECK SEAT MEMORY SWITCH FUNCTION |
(a) When any seat memory switch (M1, M2 or M3) is pressed, check that the driver seat moves to the memorized position.
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OK:
Driver seat moves to the memorized position.
| NG | .gif) | GO TO FRONT POWER SEAT CONTROL SYSTEM (Power Seat does not Return to Memorized Position) |
|
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| 2. | CHECK ELECTRICAL REMOTE CONTROL MIRROR FUNCTION |
(a) Check the electrical remote control mirror function.
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OK:
Electrical remote control mirror function is normal.
| NG | | GO TO OTHER DIAGNOSTIC PROCEDURE (Power Mirror cannot be Adjusted with Power Mirror Switch) |
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| 3. | 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 / Mirror L or Mirror R / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Mirror L > Data List| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Mirror Memory No.1 | Mirror position memorized in memory switch M1 | OFF or ON | OFF: Not memorized ON: Memorized | - |
| Mirror Memory No.2 | Mirror position memorized in memory switch M2 | OFF or ON | OFF: Not memorized ON: Memorized | - |
| Mirror Memory No.3 | Mirror position memorized in memory switch M3 | OFF or ON | OFF: Not memorized ON: Memorized | - |
| Tester Display |
|---|
| Mirror Memory No.1 |
| Mirror Memory No.2 |
| Mirror Memory No.3 |
| Tester Display | Measurement Item | Range | Normal Condition | Diagnostic Note |
|---|---|---|---|---|
| Mirror Memory No.1 | Mirror position memorized in memory switch M1 | OFF or ON | OFF: Not memorized ON: Memorized | - |
| Mirror Memory No.2 | Mirror position memorized in memory switch M2 | OFF or ON | OFF: Not memorized ON: Memorized | - |
| Mirror Memory No.3 | Mirror position memorized in memory switch M3 | OFF or ON | OFF: Not memorized ON: Memorized | - |
| Tester Display |
|---|
| Mirror Memory No.1 |
| Mirror Memory No.2 |
| Mirror Memory No.3 |
OK:
ON (Memorized) appears on the screen.
| NG | | GO TO OTHER DIAGNOSTIC PROCEDURE (Power Mirror Surface Position is not Memorized) |
|
| 4. | CHECK MEMORY AND REACTIVATION FUNCTION |
| (a) Turn the engine switch on (IG). |
|
(b) Using the outer mirror 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 outer mirror 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 on both mirrors are not normal | A |
| Memory and reactivation function on driver door mirror is not normal | B |
| Memory and reactivation function on front passenger door mirror is not normal | C |
| A | | REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) |
| C | | GO TO STEP 7 |
|
| 5. | REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR) |
(a) Temporarily replace the outer rear view mirror assembly (driver door) with a new or known good one.
Click here
|
| 6. | CHECK MEMORY AND REACTIVATION FUNCTION |
| (a) Turn the engine switch on (IG). |
|
(b) Using the outer mirror 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 outer mirror 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.
| OK | | END (OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR) WAS DEFECTIVE) |
| NG | | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR) |
| 7. | REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR) |
(a) Temporarily replace the outer rear view mirror assembly (front passenger door) with a new or known good one.
Click here
|
| 8. | CHECK MEMORY AND REACTIVATION FUNCTION |
| (a) Turn the engine switch on (IG). |
|
(b) Using the outer mirror 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 outer mirror 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.
| OK | | END (OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR) WAS DEFECTIVE) |
| NG | | REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER DOOR) |
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