Toyota Tundra. Manual — part 2494

INSPECTION PROCEDURE

1. INSPECT FUSE (CARGO LP)

a. Remove the CARGO LP fuse from the main body ECU.

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

Standard resistance

FUSE (CARGO LP)

NG: REPLACE FUSE

OK: Go to next step

2. PERFORM ACTIVE TEST BY TECHSTREAM (CARGO LIGHT)

a. Operate the Techstream according to the steps on the display and select "Active Test".

Techstream

Main Body ECU

MAIN BODY ECU - TECHSTREAM ACTIVE TEST CHART

OK: Cargo light turns on / off.

NG: Go to step 3

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE

3. READ VALUE OF TECHSTREAM (CARGO LIGHT SWITCH)

a. Operate the Techstream according to the display and select the "DATA LIST" or "Data List".

Techstream

Main Body ECU

MAIN BODY ECU - TECHSTREAM DATA LIST CHART

Tester Connection Condition Specified Condition

CARGO LP fuse

Always

Below 1 ohms

Tester Display Test Part Control Range

Diagnostic Note

Cargo Lgt

Cargo light

ON or OFF

Cargo light switch is DOOR or ON

Tester

Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

Cargo Light

Cargo light switch signal / ON or

ON: Cargo light switch
ON

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

OK: When cargo light switch operation is performed, the results are the same as above.

NG: Go to step 5

OK: Go to next step

4. CHECK HARNESS AND CONNECTOR (CARGO LIGHT - BATTERY AND BODY GROUND)

a. Disconnect the P8 light connector.

Fig. 83: Identifying Cargo Light Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard voltage

CARGO LIGHT - BATTERY AND BODY GROUND VOLTAGE

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

Standard resistance

CARGO LIGHT - BATTERY AND BODY GROUND RESISTANCE

OFF

OFF: Cargo light switch
OFF

Tester Connection

Switch Condition

Specified Condition

P8-3 (DL) - Body ground

Cargo light switch ON

11 to 14 V

Cargo light switch DOOR, door is open

Cargo light switch OFF

Below 1 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU

5. INSPECT CARGO LIGHT SWITCH

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

Fig. 84: Identifying Cargo 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

CARGO LIGHT SWITCH RESISTANCE

NG: REPLACE CARGO LIGHT SWITCH (see REMOVAL )

OK: Go to next step

Tester Connection

Switch Condition Specified Condition

P8-1 (E) - Body ground

Always

Below 1 ohms

Tester Connection

Switch Condition

Specified Condition

5 (FCTY) - 9 (FLON)

Cargo tight switch ON

Below 1 ohms

Cargo light switch DOOR

Cargo light switch OFF

10 kohms or higher

10 (FLMP) - 7 (E)

Cargo light switch ON

Below 1 ohms

Cargo light switch DOOR

10 kohms or higher

Cargo light switch OFF

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra

6. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY

GROUND)

a. Disconnect the J3 and J4 ECU connectors.

Fig. 85: Front View of Harness Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard voltage

MAIN BODY ECU - BATTERY AND BODY GROUND VOLTAGE

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

Standard resistance

MAIN BODY ECU - BATTERY AND BODY GROUND RESISTANCE

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Tester Connection

Switch Condition

Specified Condition

J4-14 (CGLP) -Body ground

Cargo light switch ON or DOOR

11 to 14 V

Cargo light switch OFF

Below 1 V

Tester Connection

Switch Condition

Specified Condition

J3-9 (CGSW) - Body ground

Cargo light switch ON

Below 1 ohms

Cargo light switch DOOR or OFF 10 kohms or higher

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Lighting - Tundra