Toyota Venza: Power Mirror cannot be Adjusted with Power Mirror Switch

Toyota Venza Service Manual / Mirror (ext) / Power Mirror Control System(w/ Memory) / Power Mirror cannot be Adjusted with Power Mirror Switch

SYSTEM DESCRIPTION

The main body ECU (driver side junction block assembly) 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.

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.

GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

2.	READ VALUE USING TECHSTREAM (OUTER MIRROR SWITCH ASSEMBLY)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch ON.

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

(e) 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.

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

3.	INSPECT OUTER MIRROR SWITCH ASSEMBLY

(a) Remove the outer mirror switch assembly (See page ).

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
3 (M+) - 2 (E)	Mirror adjust switch pressed up*	90 to 110 Ω
	Mirror adjust switch pressed down*	437 to 503 Ω
	Mirror adjust switch pressed left*	744 to 856 Ω
	Mirror adjust switch pressed right*	225 to 275 Ω
1 (MSW) - 2 (E)	Mirror select switch R	Below 10 Ω
	Mirror select switch L	90 to 110 Ω
	Mirror select switch off	10 kΩ or higher

*: Set the mirror select switch to L or R.

Text in Illustration

*A	w/o Retract Mirror
*B	w/ Retract Mirror
*1	Mirror Adjust Switch
*2	Mirror Select Switch
*a	Component without harness connected (Outer Mirror Switch Assembly)

REPLACE OUTER MIRROR SWITCH ASSEMBLY

4.	CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY))

(a) Disconnect the D72 connector from the outer mirror switch assembly.

(b) Disconnect the D50 connector from the main body ECU (driver side junction block assembly).

Standard Resistance:

Tester Connection	Condition	Specified Condition
D72-2 (E) - D50-2 (MIRE)	Always	Below 1 Ω
D72-3 (M+) - D50-11 (MIRB)	Always	Below 1 Ω
D72-1 (MSW) - D50-12 (MIRS)	Always	Below 1 Ω
D72-2 (E) - Body ground	Always	10 kΩ or higher
D72-3 (M+) - Body ground	Always	10 kΩ or higher
D72-1 (MSW) - Body ground	Always	10 kΩ or higher

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY)

REPAIR OR REPLACE HARNESS OR CONNECTOR

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