Toyota Tundra. Manual — part 444

Fig. 21: Identifying N8 ECU And M6 Mirror Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE OUTER MIRROR CONTROL ECU (See DISASSEMBLY )

5. INSPECT OUTER MIRROR SWITCH ASSEMBLY

a. Remove the switch (see REMOVAL ).

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

Standard resistance

OUTER MIRROR SWITCH ASSEMBLY TESTER CONNECTION SPECIFIED
CONDITION CHART

N8-39(MHR)-M6-12 (MH)

Always

Below 1 ohms

N8-40 (MVR) - M6-10 (MV)

M6-11 (M+) - Body ground

Always

10 kohms or higher

M6-12 (MH) - Body ground

M6-10 (MV)-Body ground

Tester Connection

Switch Condition

Specified Condition

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Mirror - Tundra

Fig. 22: Inspecting Outer Mirror Switch Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE OUTER MIRROR SWITCH ASSEMBLY (see REMOVAL )

OK: Go to Next Step

6. CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - MAIN BODY ECU)

a. Disconnect the J4 ECU connector.

b. Disconnect the L6 switch connector.

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

Standard resistance

HARNESS AND CONNECTOR (OUTER MIRROR SWITCH - MAIN BODY ECU)
TESTER CONNECTION SPECIFIED CONDITION CHART

3 (M+) - 2 (E)

UP switch pushed

100 ohms

DOWN switch pushed

470 ohms

LEFT switch pushed

800 ohms

RIGHT switch pushed

250 ohms

1 (MSW) - 2 (E)

No switches pushed

10 kohms or higher

R switch pushed

Below 1 ohms

Tester Connection

Condition Specified Condition

J4-2 (MIRE) - L6-2 (E)

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Mirror - Tundra

Fig. 23: Identifying J4 ECU And L6 Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

POWER RETRACTABLE MIRRORS DO NOT OPERATE WITH POWER RETRACT MIRROR
SWITCH

SYSTEM DESCRIPTION

This circuit detects the conditions of the mirror retract switch.

The outer mirror switch sends information about the operating condition of the mirror retract switch (switch

J4-11 (MIRB) - L6-3 (M+)

Always

Below 1 ohms

J4-12 (MIRS) - L6-1 (MSW)

L6-2 (E) - Body ground

Always

10 kohms or higher

L6-3 (M+) - Body ground

L6-1 (MSW) - Body ground

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Mirror - Tundra

input signals) through the CAN communication line. Then the switch input signals are sent to the outer mirror
control ECU.

WIRING DIAGRAM

Fig. 24: Power Retractable Mirrors Do Not Operate With Power Retract Mirror Switch - Wiring
Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. CHECK DTC

a. Use the Techstream to check if the CAN communication system is functioning normally (see

DIAGNOSIS SYSTEM ).

Result

DTC RESULT CHART

Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Mirror - Tundra