Toyota Venza: Power Mirror Surface Position is not Memorized

SYSTEM DESCRIPTION

If either the M1 or M2 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 (driver side junction block assembly) via CAN communication. On receiving the seat memory switch signal, the main body ECU (driver side junction block assembly) 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 rear view mirror assembly.

HINT:

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

WIRING DIAGRAM

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Use the Techstream to check if the CAN communication system is functioning normally (See page ).

OK:

CAN communication DTC is not output.

NG

GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

OK

2.	READ VALUE USING TECHSTREAM (SEAT MEMORY SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Mirror L / Data List.

(e) Read the Data List according to the display on the Techstream.

Mirror L / Mirror R

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	Not applicable
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

GO TO STEP 5

OK

3.	CHECK SEAT MEMORY SWITCH FUNCTION

(a) When any seat memory switch (M1 or M2 switch) is pressed, check that the driver seat moves to the memorized position.

OK:

The driver seat moves to the memorized position.

NG

GO TO POWER SEAT CONTROL SYSTEM (Power Seat does not Return to Memorized Position)

OK

4.	CHECK MEMORY AND REACTIVATION FUNCTION

(a) Turn the ignition switch ON.

(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 recorded fully left position.

Result	Proceed to
Memory and reactivation functions on both mirrors are not normal	A
Memory and reactivation functions on driver door mirror are not normal	B
Memory and reactivation functions on front passenger door mirror are not normal	C

Text in Illustration

*a	Turn to Left Fully

A

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

B

GO TO STEP 7

C

GO TO STEP 9

5.	CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH - OUTER MIRROR CONTROL ECU ASSEMBLY)

(a) Disconnect the I13 connector from the outer mirror control ECU assembly.

(b) Disconnect the I10 connector from the seat memory switch.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
I10-2 (MRY) - I13-1 (MM)	Always	Below 1 Ω
I10-4 (M1) - I13-2 (M1)	Always	Below 1 Ω
I10-3 (M2) - I13-3 (M2)	Always	Below 1 Ω
I10-1 (U) - I13-13 (MSWE)	Always	Below 1 Ω
I10-2 (MRY) - Body ground	Always	10 kΩ or higher
I10-4 (M1) - Body ground	Always	10 kΩ or higher
I10-3 (M2) - Body ground	Always	10 kΩ or higher
I10-1 (U) - Body ground	Always	10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.	INSPECT SEAT MEMORY SWITCH

(a) Remove the seat memory switch (See page ).

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
4 (M1) - 1 (U)	M1 Switch off → on	10 kΩ or higher → Below 1 Ω
3 (M2) - 1 (U)	M2 Switch off → on	10 kΩ or higher → Below 1 Ω
2 (MRY) - 1 (U)	SET Switch off → on	10 kΩ or higher → Below 1 Ω

Text in Illustration

*a	Component without harness connected (Seat Memory Switch)

OK

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR)

NG

REPLACE SEAT MEMORY SWITCH

7.	REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR)

(a) Replace the outer rear view mirror assembly (driver door) (See page ).

NEXT

8.	CHECK MEMORY AND REACTIVATION FUNCTION

(a) Turn the ignition switch ON.

(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 recorded fully left position.

OK:

Memory and reactivation function is normal.

Text in Illustration

*a	Turn to Left Fully

OK

END (OUTER REAR VIEW MIRROR ASSEMBLY (DRIVER DOOR) WAS DEFECTIVE)

NG

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (DRIVER DOOR)

9.	REPLACE OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR)

(a) Replace the outer rear view mirror assembly (front passenger door) (See page ).

NEXT

10.	CHECK MEMORY AND REACTIVATION FUNCTION

(a) Turn the ignition switch ON.

(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 recorded fully left position.

OK:

Memory and reactivation function is normal.

Text in Illustration

*a	Turn to Left Fully

OK

END (OUTER REAR VIEW MIRROR ASSEMBLY (FRONT PASSENGER DOOR) WAS DEFECTIVE)

NG

REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY (FRONT PASSENGER DOOR)