Toyota Tundra. Manual — part 2493

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

Standard resistance

FOOT LIGHT - MAIN BODY ECU AND BATTERY RESISTANCE

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

6. INSPECT ROOM LIGHT SWITCH

a. Remove the room light switch (see REMOVAL ).

Fig. 79: Identifying Room Light Switch Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

ROOM LIGHT SWITCH

NG: REPLACE ROOM LIGHT SWITCH (see REMOVAL )

OK: Go to next step

Tester Connection Condition Specified Condition
J51-2-DD-51 (ILE)

Always

Below 1 ohms

J51-2 - Body ground Always

10 kohms or higher

Tester Connection

Switch Condition

Specified Condition

5 (FCTY) - 10 (FLMP) Room light switch DOOR

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

7. INSPECT ROOF CONSOLE BOX ASSEMBLY

a. Remove the roof console box (see REMOVAL ).

Fig. 80: Identifying Roof Console Box Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Roof console box switch is DOOR.

c. Connect the battery's positive (+) lead to terminal 2 (B) and the negative (-) lead to terminal 1

(CTY), and then check that the light turns on.

OK: Map light turns on.

NG: REPLACE ROOF CONSOLE BOX ASSEMBLY (see REMOVAL )

OK: Go to next step

8. CHECK HARNESS AND CONNECTOR (ROOF CONSOLE BOX - MAIN BODY ECU AND

BATTERY)

a. Disconnect the W7 box connector.

b. Disconnect the DD ECU connector.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

Fig. 81: Identifying Roof Console Box And Main Body ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard voltage

ROOF CONSOLE BOX - MAIN BODY ECU AND BATTERY VOLTAGE

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

Standard resistance

ROOF CONSOLE BOX - MAIN BODY ECU AND BATTERY RESISTANCE

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

CARGO LIGHT CIRCUIT

Tester Connection

Condition Specified Condition

W7-2 (B) - Body ground Always

11 to 14 V

Tester Connection

Switch Condition

Specified Condition

W7-1 (CTY) - DD-51 OLE) Room light switch DOOR

Below 1 ohms

W7-1 (CTY) - Body ground Room light switch DOOR 10 kohms or higher

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

DESCRIPTION

The main body ECU receives a cargo light information signal from the cargo light switch and door courtesy
light switch, and illuminates the cargo light.

WIRING DIAGRAM

Fig. 82: Identifying Cargo Light - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra