Power Mirror Control (W/memory) (Diagnostics & Symptom Tests): Overview Lexus CT I

SYSTEM DESCRIPTION

1. POWER MIRROR CONTROL SYSTEM DESCRIPTION This system has the following functions: power retract mirror function, AUTO power retract mirror function*, automatic glare-resistant electrochromic (EC) mirror function, reverse shift-linked function, electrical remote control function, memory function and mirror heater function. *: w/ AUTO retract mirror
2. FUNCTION OF MAIN COMPONENT Component Function Vertical mirror motor Receives a signal from the outer mirror control ECU assembly and adjusts the mirror surface position vertically. Horizontal mirror motor Receives a signal from the outer mirror control ECU assembly and adjusts the mirror surface position horizontally. Power retract mirror motor* Receives a signal from the outer mirror control ECU assembly, and retracts and returns the outer rear view mirror assemblies. Mirror position sensor Detects the mirror surface position. This data is detected by the outer mirror control ECU assembly. Mirror heater Receives a signal from the outer mirror control ECU assembly and operates the mirror heater. EC mirror cell Varies reflection rate of the mirror through function of EC elements. Mirror select switch Consists of R and L switches. One must be chosen to operate the outer mirror switch assembly. Mirror adjust switch Mirror R and L signals are sent to each outer mirror control ECU assembly from the mirror select switch. After selecting the R or L switch, the right, left, up and down control switches can be operated to change the angle of the mirror. Retractable outer mirror switch* Retracts and returns the outer rear view mirror assemblies. Mirror retract and return signals are sent to each outer mirror control ECU assembly from the main body ECU (multiplex network body ECU). Seat memory switch When the seat memory M1, M2 or M3 switch is pressed while the SET switch is being pressed, or the M1, M2 or M3 switch is pressed within 3 seconds of the SET switch being pressed, a signal is sent to the outer mirror control ECU assembly (driver side), which records the mirror surface position. When the seat memory switch is pressed, a signal is sent to the outer mirror control ECU assembly (driver side) and sent to the main body ECU (multiplex network body ECU), which changes the mirror surface position to the memorized position. Outer mirror control ECU assembly Operates each mirror motor based on signals from the mirror select switch and mirror adjust switch. Based on information from the mirror position sensor, 3 different mirror surface positions can be stored. By operating a seat memory switch, the mirror surface moves to the stored position. *: w/ Retract mirror
3. SYSTEM OPERATION The remote control mirror has the following features. Function Outline Electrical remote control mirror function When the outer mirror switch assembly is operated, this function moves the mirror surface vertically or horizontally to enable the driver to attain an optimal mirror angle. Setting the mirror select switch to the R position operates the right mirror, and setting it to the L position operates the left mirror. Memory and reactivation function Stores the adjusted mirror position in the outer mirror control ECU assembly. Power retract mirror function* Retracts and returns the outer rear view mirror assemblies when the retractable outer mirror switch is pressed. AUTO power retract mirror function* Retracts and returns each outer rear view mirror assembly together with the following operations while the retractable outer mirror switch is in the AUTO position. Manual lock/unlock Key-linked lock/unlock Wireless door lock/unlock Wireless 30 seconds auto lock Entry lock/unlock Smart 30 seconds auto lock Reverse shift-linked function of mirrors Directs the mirror surface downward to improve visibility when driving in reverse and all the conditions below are met: The power switch is on (IG). Shift lever is moved to R. The mirror select switch is in the R or L position. Mirror heater function Automatically turns on the mirror heaters when the rear window defogger switch is turned on. The rear window defogger and mirror heaters automatically turn off after 15 min. Automatic glare-resistant EC mirror function Reduces glare/reflection in the mirror during nighttime driving for safe driving conditions. Glare/reflection from vehicle headlights behind could blind the driver and cause dangerous driving conditions. *: w/ Retract mirror

When the mirror adjust switch is operated, the main body ECU (multiplex network body ECU) detects the switch operation and sends the mirror adjust switch signal to the outer mirror control ECU assembly (driver side) via CAN communication. On receiving the signal, the outer mirror control ECU assembly (driver side) operates the vertical and horizontal mirror motors, which are built into the outer mirror actuator assembly LH, to adjust the mirror surface position.

Scheme 65

When the mirror adjust switch is operated, the main body ECU (multiplex network body ECU) detects the switch operation and sends the mirror adjust switch signal to the outer mirror control ECU assembly (front passenger side) via CAN communication. On receiving the signal, the outer mirror control ECU assembly (front passenger side) operates the vertical and horizontal mirror motors, which are built into the outer mirror actuator assembly RH, to adjust the mirror surface position.

Scheme 66

The main body ECU (multiplex network body ECU) detects the mirror adjust switch status and sends the signal to the outer mirror control ECU assembly via CAN communication. On receiving the signal, each outer mirror control ECU assembly operates the vertical and horizontal mirror motors to adjust the mirror surface position.

Scheme 67

Scheme 68

1. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM . OK CAN communication DTC is not output. NG --> See step 5 OK: Go to next step
2. READ VALUE USING TECHSTREAM (OUTER MIRROR SWITCH ASSEMBLY) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the Data List according to the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Mirror Selection SW (R) Mirror select switch signal for RH mirror / ON or OFF ON: Mirror select switch in R position OFF: Mirror select switch off or in L position - Mirror Selection SW (L) Mirror select switch signal for LH mirror / ON or OFF ON: Mirror select switch in L position OFF: Mirror select switch off or in R position - Mirror Position SW (R) Mirror adjust switch signal (Right) / ON or OFF ON: Mirror adjust switch pressed right OFF: Mirror adjust switch not pressed right Check with the mirror select switch in any position except neutral Mirror Position SW (L) Mirror adjust switch signal (Left) / ON or OFF ON: Mirror adjust switch pressed left OFF: Mirror adjust switch not pressed left Check with the mirror select switch in any position except neutral Mirror Position SW (Up) Mirror adjust switch signal (Up) / ON or OFF ON: Mirror adjust switch pressed up OFF: Mirror adjust switch not pressed up Check with the mirror select switch in any position except neutral Mirror Position SW (Dwn) Mirror adjust switch signal (Down) / ON or OFF ON: Mirror adjust switch pressed down OFF: Mirror adjust switch not pressed down Check with the mirror select switch in any position except neutral OK On the Techstream screen, ON or OFF is displayed for each item according to the table above. NG --> See step 3 OK --> See step 7
3. INSPECT OUTER MIRROR SWITCH ASSEMBLY w/ Retract mirror: Remove the outer mirror switch assembly. Refer to REMOVAL . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition H136-8 (M+) - H136-6 (E) Mirror adjust switch pressed up 90 to 110 ohms Mirror adjust switch pressed down 437 to 503 ohms Mirror adjust switch pressed left 744 to 856 ohms Mirror adjust switch pressed right 225 to 275 ohms H136-3 (MSW) - H136-6 (E) Mirror select switch R Below 10 ohms Mirror select switch L 90 to 110 ohms Mirror select switch off 10 kohms or higher TEXT IN ILLUSTRATION *1 Mirror Adjust Switch *2 Mirror Select Switch *a Component without harness connected (Outer Mirror Switch Assembly) w/o Retract mirror: Remove the outer mirror switch assembly. Refer to REMOVAL . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition H37-16 (M+) - H37-14 (E) Mirror adjust switch pressed up 90 to 110 ohms Mirror adjust switch pressed down 437 to 503 ohms Mirror adjust switch pressed left 744 to 856 ohms Mirror adjust switch pressed right 225 to 275 ohms H37-13 (MSW) - H37-14 (E) Mirror select switch R Below 10 ohms Mirror select switch L 90 to 110 ohms Mirror select switch off 10 kohms or higher TEXT IN ILLUSTRATION *1 Mirror Adjust Switch *2 Mirror Select Switch *a Component without harness connected (Outer Mirror Switch Assembly) NG --> See step 8 OK: Go to next step
4. CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - MAIN BODY ECU) w/ Retract mirror: Disconnect the H17 connector from the main body ECU (multiplex network body ECU). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H136-6 (E) - H17-15 (MIRE) Always Below 1 ohms H136-8 (M+) - H17-13 (MIRB) Always Below 1 ohms H136-3 (MSW) - H17-14 (MIRS) Always Below 1 ohms H136-6 (E) - Body ground Always 10 kohms or higher H136-8 (M+) - Body ground Always 10 kohms or higher H136-3 (MSW) - Body ground Always 10 kohms or higher w/o Retract mirror: Disconnect the H17 connector from the main body ECU (multiplex network body ECU). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H37-14 (E) - H17-15 (MIRE) Always Below 1 ohms H37-16 (M+) - H17-13 (MIRB) Always Below 1 ohms H37-13 (MSW) - H17-14 (MIRS) Always Below 1 ohms H37-14 (E) - Body ground Always 10 kohms or higher H37-16 (M+) - Body ground Always 10 kohms or higher H37-13 (MSW) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (OUTER MIRROR SWITCH - MAIN BODY ECU) OK --> See step 6
5. GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to DIAGNOSTIC TROUBLE CODE CHART
6. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL
7. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL
8. REPLACE OUTER MIRROR SWITCH ASSEMBLY. Refer to REMOVAL

DESCRIPTION

When the rear defogger switch is operated, the mirror heater signal is sent to the A/C amplifier assembly and then to each outer mirror control ECU assembly via CAN communication. Based on the signal, each outer mirror control ECU assembly operates the mirror heater.

Scheme 69

The main body ECU (multiplex network body ECU) receives the retractable outer mirror switch signal from the retractable outer mirror switch. The main body ECU then sends the mirror retract/return signal to each outer mirror control ECU assembly via CAN communication. Based on the signal, each outer mirror control ECU assembly retracts or returns the outer rear view mirror assembly.

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1. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM . OK CAN communication DTC is not output. NG --> See step 8 OK: Go to next step
2. READ VALUE USING TECHSTREAM (RETRACTABLE OUTER MIRROR SWITCH) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the Data List according to the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Outer Mirror Fold SW Retractable outer mirror switch signal / ON or OFF ON: Retractable outer mirror switch in retract position OFF: Retractable outer mirror switch in driving position - OK On the Techstream screen, ON or OFF is displayed for each item according to the above. NG --> See step 6 OK: Go to next step
3. PERFORM ACTIVE TEST USING TECHSTREAM (MIRROR RETRACT FUNCTION) Enter the following menus: Body Electrical / Mirror L or Mirror R / Active Test. Perform the Active Test according to the display on the Techstream. MIRROR L / MIRROR R Tester Display Test Part Control Range Diagnostic Note Mirror Fold/Return Mirror retract operation Fold / Return This test causes vehicle parts to move. Please watch your hands and feet. Confirm that the vehicle is stopped. Result Result Proceed to Outer rear view mirror assemblies operate normally A Outer rear view mirror assembly RH does not operate normally B Outer rear view mirror assembly LH does not operate normally C B --> See step 4 C --> See step 5 A --> See step 13
4. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH Remove the outer rear view mirror assembly RH. Refer to INSPECTION . When checking each mirror position, set the mirror position by hand. Apply auxiliary battery voltage and check the mirror movement. NOTE: Disconnect and reconnect the auxiliary battery for each mirror position check. The mirror position cannot be changed manually when the auxiliary battery is connected. To change the mirror position manually, the auxiliary battery must be disconnected first. OK Measurement Condition Mirror Position Specified Condition Auxiliary battery positive (+) --> Terminal z7-3 (MR+) Auxiliary battery negative (-) --> Terminal z7-11 (MR-) Forward position (A) Moves from (A) to retracted position (E) Auxiliary battery negative (-) --> Terminal z7-3 (MR+) Auxiliary battery positive (+) --> Terminal z7-11 (MR-) Forward position (A) Does not move Auxiliary battery positive (+) --> Terminal z7-3 (MR+) Auxiliary battery negative (-) --> Terminal z7-11 (MR-) Between forward position (A) and driving position (C) Moves from (B) to retracted position (E) Auxiliary battery negative (-) --> Terminal z7-3 (MR+) Auxiliary battery positive (+) --> Terminal z7-11 (MR-) Between forward position (A) and driving position (C) Moves from (B) to forward position (A) Auxiliary battery positive (+) --> Terminal z7-3 (MR+) Auxiliary battery negative (-) --> Terminal z7-11 (MR-) Driving position (C) Moves from (C) to retracted position (E) Auxiliary battery negative (-) --> Terminal z7-3 (MR+) Auxiliary battery positive (+) --> Terminal z7-11 (MR-) Driving position (C) Does not move Auxiliary battery positive (+) --> Terminal z7-3 (MR+) Auxiliary battery negative (-) --> Terminal z7-11 (MR-) Between driving position (C) and retracted position (E) Moves from (D) to retracted position (E) Auxiliary battery negative (-) --> Terminal z7-3 (MR+) Auxiliary battery positive (+) --> Terminal z7-11 (MR-) Between driving position (C) and retracted position (E) Moves from (D) to driving position (C) Auxiliary battery positive (+) --> Terminal z7-3 (MR+) Auxiliary battery negative (-) --> Terminal z7-11 (MR-) Retracted position (E) Does not move Auxiliary battery negative (-) --> Terminal z7-3 (MR+) Auxiliary battery positive (+) --> Terminal z7-11 (MR-) Retracted position (E) Moves from (E) to driving position (C) TEXT IN ILLUSTRATION *a Component without harness connected (Outer Rear View Mirror Assembly RH) *b (A) Forward Position *c (B) *d (C) Driving Position *e (D) *f (E) Retracted Position NG --> See step 9 OK --> See step 12
5. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH Remove the outer rear view mirror assembly LH. Refer to REMOVAL . When checking each mirror position, set the mirror position by hand. Apply auxiliary battery voltage and check the mirror movement. NOTE: Disconnect and reconnect the auxiliary battery for each mirror position check. The mirror position cannot be changed manually when the auxiliary battery is connected. To change the mirror position manually, the auxiliary battery must be disconnected first. OK Measurement Condition Mirror Position Specified Condition Auxiliary battery positive (+) --> Terminal z6-3 (MR+) Auxiliary battery negative (-) --> Terminal z6-11 (MR-) Forward position (A) Moves from (A) to retracted position (E) Auxiliary battery negative (-) --> Terminal z6-3 (MR+) Auxiliary battery positive (+) --> Terminal z6-11 (MR-) Forward position (A) Does not move Auxiliary battery positive (+) --> Terminal z6-3 (MR+) Auxiliary battery negative (-) --> Terminal z6-11 (MR-) Between forward position (A) and driving position (C) Moves from (B) to retracted position (E) Auxiliary battery negative (-) --> Terminal z6-3 (MR+) Auxiliary battery positive (+) --> Terminal z6-11 (MR-) Between forward position (A) and driving position (C) Moves from (B) to forward position (A) Auxiliary battery positive (+) --> Terminal z6-3 (MR+) Auxiliary battery negative (-) --> Terminal z6-11 (MR-) Driving position (C) Moves from (C) to retracted position (E) Auxiliary battery negative (-) --> Terminal z6-3 (MR+) Auxiliary battery positive (+) --> Terminal z6-11 (MR-) Driving position (C) Does not move Auxiliary battery positive (+) --> Terminal z6-3 (MR+) Auxiliary battery negative (-) --> Terminal z6-11 (MR-) Between driving position (C) and retracted position (E) Moves from (D) to retracted position (E) Auxiliary battery negative (-) --> Terminal z6-3 (MR+) Auxiliary battery positive (+) --> Terminal z6-11 (MR-) Between driving position (C) and retracted position (E) Moves from (D) to driving position (C) Auxiliary battery positive (+) --> Terminal z6-3 (MR+) Auxiliary battery negative (-) --> Terminal z6-11 (MR-) Retracted position (E) Does not move Auxiliary battery negative (-) --> Terminal z6-3 (MR+) Auxiliary battery positive (+) --> Terminal z6-11 (MR-) Retracted position (E) Moves from (E) to driving position (C) TEXT IN ILLUSTRATION *a Component without harness connected (Outer Rear View Mirror Assembly LH) *b (A) Forward Position *c (B) *d (C) Driving Position *e (D) *f (E) Retracted Position NG --> See step 11 OK --> See step 10
6. INSPECT RETRACTABLE OUTER MIRROR SWITCH Remove the retractable outer mirror switch. Refer to REMOVAL . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition H137-2 (MR) - H137-3 (E) Retract position Below 1 ohms H137-2 (MR) - H137-3 (E) AUTO position 10 kohms or higher H137-2 (MR) - H137-3 (E) Return position 10 kohms or higher NG --> See step 14 OK: Go to next step
7. CHECK HARNESS AND CONNECTOR (RETRACTABLE OUTER MIRROR SWITCH - MAIN BODY ECU) Disconnect the H17 connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H137-2 (MR) - H17-28 (RET) Always Below 1 ohms H137-2 (MR) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (RETRACTABLE OUTER MIRROR SWITCH - MAIN BODY ECU) OK --> See step 15
8. GO TO CAN COMMUNICATION SYSTEM. Refer to DIAGNOSTIC TROUBLE CODE CHART
9. REPLACE OUTER MIRROR ACTUATOR ASSEMBLY RH. Refer to DISASSEMBLY
10. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE). Refer to REMOVAL
11. REPLACE OUTER MIRROR ACTUATOR ASSEMBLY LH. Refer to DISASSEMBLY
12. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER SIDE). Refer to REMOVAL
13. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL
14. REPLACE RETRACTABLE OUTER MIRROR SWITCH. Refer to REMOVAL
15. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL

The retractable outer mirror switch sends a voltage signal to the main body ECU (multiplex network body ECU) in accordance with switch operation (switch input signal). The main body ECU (multiplex network body ECU) uses CAN communication to send this information to the outer mirror control ECU assembly, which then controls the mirrors.

When the outer mirror control ECU assembly receives a door lock output signal from the main body ECU (multiplex network body ECU) while the retractable outer mirror switch is in the AUTO position, the outer mirror control ECU assembly operates the retract motors built into the outer rear view mirror assemblies to retract or return the outer rear view mirror assemblies.

Scheme 74

1. CHECK POWER RETRACT MIRROR FUNCTION Check power retract mirror function. Refer to OPERATION CHECK . OK Power retract mirror function is normal. NG --> See step 15 OK: Go to next step
2. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM . OK CAN communication DTC is not output. NG --> See step 9 OK: Go to next step
3. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM Check the wireless door lock control system. Refer to OPERATION CHECK . OK Wireless door lock control system is normal. NG --> See step 14 OK: Go to next step
4. CHECK SMART ACCESS SYSTEM WITH PUSH-BUTTON START (ENTRY FUNCTION) Check the smart access system with push-button start (entry function). Refer to OPERATION CHECK . OK Smart access system with push-button start (entry function) is normal. NG --> See step 10 OK: Go to next step
5. READ VALUE USING TECHSTREAM Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Main Body / Data List. Read the Data List according to the display on the Techstream. MAIN BODY Tester Display Measurement Item/Range Normal Condition Diagnostic Note Auto Mirror SW Retractable outer mirror switch signal / ON or OFF ON: Retractable outer mirror switch in AUTO position OFF: Retractable outer mirror switch in except AUTO position - OK On the Techstream screen, ON or OFF is displayed for each item according to the table above. NG --> See step 7 OK: Go to next step
6. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY Replace the outer mirror control ECU assembly. Refer to REMOVAL . NG --> See step 12 OK --> See step 11
7. INSPECT RETRACTABLE OUTER MIRROR SWITCH Remove the retractable outer mirror switch. Refer to REMOVAL . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Switch Condition Specified Condition H137-8 (MF) - H137-3 (E) AUTO position Below 1 ohms H137-8 (MF) - H137-3 (E) Except AUTO position 10 kohms or higher NG --> See step 13 OK --> See step 8
8. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - RETRACTABLE OUTER MIRROR SWITCH) Disconnect the H17 connector from the main body ECU (multiplex network body ECU). Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition H137-8 (MF) - H17-27 (AMR) Always Below 1 ohms H137-8 (MF) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - RETRACTABLE OUTER MIRROR SWITCH) OK --> See step 16
9. GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to DIAGNOSTIC TROUBLE CODE CHART
10. GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (PROBLEM SYMPTOMS TABLE). Refer to PROBLEM SYMPTOMS TABLE
11. END (OUTER MIRROR CONTROL ECU ASSEMBLY WAS DEFECTIVE). Refer to REMOVAL
12. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL
13. REPLACE RETRACTABLE OUTER MIRROR SWITCH. Refer to REMOVAL
14. GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (PROBLEM SYMPTOMS TABLE). Refer to PROBLEM SYMPTOMS TABLE
15. GO TO OTHER FLOW CHART (Retract Mirror do not Operate with Retract Switch). Refer to Power Retractable Mirrors do not Operate with Power Retract Mirror Switch
16. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL

If any of the M1, M2 or M3 seat memory switches is pressed, the outer mirror control ECU assembly (driver side) detects the switch operation and sends the seat memory switch signal to the main body ECU (multiplex network body ECU) via CAN communication. On receiving the seat memory switch signal, the main body ECU (multiplex network body ECU) sends the memory request signal to each outer mirror control ECU assembly via CAN communication. When receiving this signal, each outer mirror control ECU assembly stores the mirror surface position based on information from the mirror position sensor, which is built into the outer mirror actuator assembly.

HINT

Each outer mirror actuator assembly has a built-in mirror vertical position sensor and mirror horizontal position sensor.

Note. The mirror surface position will not be memorized if the power switch is not on (IG). The mirror surface position will not be stored if the seat memory SET switch and 2 or more of the seat memory switches (for example, M1 switch and M2 switch) are pressed simultaneously. If the operation fails, the mirror surface position will not be memorized until the seat memory SET switch is turned off. The mirror surface position will not be memorized when the mirror is operated manually.

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1. CHECK CAN COMMUNICATION SYSTEM Use the Techstream to check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM . OK CAN communication DTC is not output. NG --> See step 11 OK: Go to next step
2. READ VALUE USING TECHSTREAM (SEAT MEMORY SWITCH) Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / Mirror L / Data List. Read the Data List according to the display on the Techstream. MIRROR L Tester Display Measurement Item/Range Normal Condition Diagnostic Note Seat Memory Switch1 Seat memory switch M1 signal/ ON or OFF ON: Seat memory switch M1 on OFF: Seat memory switch M1 off - Seat Memory Switch2 Seat memory switch M2 signal/ ON or OFF ON: Seat memory switch M2 on OFF: Seat memory switch M2 off - Seat Memory Switch3 Seat memory switch M3 signal/ ON or OFF ON: Seat memory switch M3 on OFF: Seat memory switch M3 off - Seat Memory Set SW Seat memory switch SET signal/ ON or OFF ON: Seat memory switch SET on OFF: Seat memory switch SET off - OK The Techstream display changes between ON and OFF according to the switch operations. NG --> See step 5 OK: Go to next step
3. CHECK SEAT MEMORY SWITCH FUNCTION When any seat memory switch (M1, M2 or M3 switch) is pressed, check that the driver side seat moves to the memorized position. OK The driver side seat moves to the memorized position. NG --> See step 12 OK: Go to next step
4. CHECK MEMORY AND REACTIVATION FUNCTION Turn the power switch on (IG). Using the outer mirror switch assembly, turn the mirror surface to the fully left position. Press the M1 switch while the SET switch is being pressed. Check that the buzzer sounds for 0.5 seconds and the mirror surface position is memorized. Using the outer mirror switch assembly, turn the mirror surface to the fully right position. Press the M1 switch. Check that the buzzer sounds for 0.1 seconds and the outer mirror automatically moves to the recorded fully left position. Result Result Proceed to Memory and reactivation functions on both mirrors are not normal A Memory and reactivation function on RH side mirrors is not normal B Memory and reactivation function on LH side mirror is not normal C TEXT IN ILLUSTRATION *a Turn to Left Fully B --> See step 7 C --> See step 9 A --> See step 13
5. CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH - OUTER MIRROR CONTROL ECU ASSEMBLY) Disconnect the K7 connector from the outer mirror control ECU assembly. Disconnect the Z1 connector from the seat memory switch. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Z1-1 (MRY) - K7-1 (MM) Always Below 1 ohms Z1-2 (M1) - K7-2 (M1) Always Below 1 ohms Z1-3 (M2) - K7-3 (M2) Always Below 1 ohms Z1-4 (M3) - K7-4 (M3) Always Below 1 ohms Z1-5 (E) - K7-13 (MSWE) Always Below 1 ohms Z1-1 (MRY) - Body ground Always 10 kohms or higher Z1-2 (M1) - Body ground Always 10 kohms or higher Z1-3 (M2) - Body ground Always 10 kohms or higher Z1-4 (M3) - Body ground Always 10 kohms or higher Z1-1 (MRY) - Body ground Always 10 kohms or higher NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR (SEAT MEMORY SWITCH - OUTER MIRROR CONTROL ECU ASSEMBLY) OK: Go to next step
6. INSPECT SEAT MEMORY SWITCH Remove the seat memory switch. Refer to REMOVAL . Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition Z1-2 (M1) - Z1-5 (E) M1 Switch off --> on 10 kohms or higher --> Below 1 ohms Z1-3 (M2) - Z1-5 (E) M2 Switch off --> on 10 kohms or higher --> Below 1 ohms Z1-4 (M3) - Z1-5 (E) M3 Switch off --> on 10 kohms or higher --> Below 1 ohms Z1-1 (MRY) - Z1-5 (E) SET Switch off --> on 10 kohms or higher --> Below 1 ohms TEXT IN ILLUSTRATION *a Component without harness connected (Seat Memory Switch) NG --> See step 16 OK --> See step 14
7. REPLACE OUTER MIRROR ACTUATOR ASSEMBLY RH Replace the outer mirror actuator assembly RH. Refer to DISASSEMBLY . NEXT: Go to next step
8. CHECK MEMORY AND REACTIVATION FUNCTION Turn the power switch on (IG). Using the outer mirror switch assembly, turn the mirror surface to the fully left position. Press the M1 switch while the SET switch is being pressed. Check that the buzzer sounds for 0.5 seconds and the mirror surface position is memorized. Using the outer mirror switch assembly, turn the mirror surface to the fully right position. Press the M1 switch. Check that the buzzer sounds for 0.1 seconds and the outer mirror automatically moves to the recorded fully left position. OK Memory and reactivation function is normal. TEXT IN ILLUSTRATION *a Turn to Left Fully NG --> See step 17 OK --> END (OUTER MIRROR ACTUATOR ASSEMBLY RH WAS DEFECTIVE)
9. REPLACE OUTER MIRROR ACTUATOR ASSEMBLY LH Replace the outer mirror actuator assembly LH. Refer to DISASSEMBLY . NEXT: Go to next step
10. CHECK MEMORY AND REACTIVATION FUNCTION Turn the power switch on (IG). Using the outer mirror switch assembly, turn the mirror surface to the fully left position. Press the M1 switch while the SET switch is being pressed. Check that the buzzer sounds for 0.5 seconds and the mirror surface position is memorized. Using the outer mirror switch assembly, turn the mirror surface to the fully right position. Press the M1 switch. Check that the buzzer sounds for 0.1 seconds and the outer mirror automatically moves to the recorded fully left position. OK Memory and reactivation function is normal. TEXT IN ILLUSTRATION *a Turn to Left Fully NG --> See step 15 OK --> END (OUTER MIRROR ACTUATOR ASSEMBLY LH WAS DEFECTIVE)
11. GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART). Refer to DIAGNOSTIC TROUBLE CODE CHART
12. GO TO POWER SEAT CONTROL SYSTEM (Power Seat does not Return to Memorized Position). Refer to Power Seat does not Return to Memorized Position
13. REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL
14. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE). Refer to REMOVAL
15. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER SIDE). Refer to REMOVAL
16. REPLACE SEAT MEMORY SWITCH. Refer to REMOVAL
17. REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER SIDE). Refer to REMOVAL

If any of the M1, M2 or M3 seat memory switches is pressed, the outer mirror control ECU assembly (driver side) detects the seat memory switch status and sends the switch signal to the main body ECU (multiplex network body ECU) via CAN communication. The main body ECU (multiplex network body ECU) sends back reproduction signals to each outer mirror control ECU assembly via CAN communication. When receiving the reproduction signals, each outer mirror control ECU assembly operates the vertical and horizontal mirror motors, which are built into the outer mirror actuator assembly, to adjust the mirror surface to the stored position.

Scheme 79

On receiving a reverse signal from the shift lever position sensor, the power management control ECU 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. Each outer mirror control ECU assembly then performs control in response to the reverse signal.

HINT

The reverse shift-linked function will not activate when the mirror select switch is in the neutral position (off).

Scheme 80

The key ID can be registered to be linked with each of the M1, M2 and M3 seat memory switches. The key ID registration procedure should be performed while the electrical key transmitter is in the vehicle, the power switch is on (IG), and the driver door is closed. When the registration is completed, the buzzer will sound as an answerback.

When the vehicle doors are unlocked through wireless unlock or entry unlock operation, the certification ECU (smart key ECU assembly) sends the key ID signal and smart memory call request signal to the main body ECU (multiplex network body ECU). When the main body ECU (multiplex network body ECU) receives the signal and the driver door is opened, the ECU sends the memory call command signal for the received key ID to each outer mirror control ECU assembly. On receiving the memory call command signal, each outer mirror control ECU assembly moves the mirror surface to the stored position.

See also:
• INSPECTION
• REMOVAL
• REMOVAL