Toyota Tundra. Manual — part 902

Fig. 18: Sliding Roof ECU Power Source - Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

INSPECTION PROCEDURE

1. READ VALUE USING TECHSTREAM (IGNITION SWITCH SIGNAL)

a. Use the Data List to check if the ignition switch signal is functioning properly (see DATA LIST /

ACTIVE TEST ).

Sliding Roof

TECHSTREAM SLIDING ROOF - DATA LIST

OK: The Techstream displays as shown in the table according to the operation of each switch.

NG: Go to step 2

OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) (see
DISASSEMBLY )

2. INSPECT FUSE (S/ROOF, ECU-IG No. 1)

a. Remove the S/ROOF and ECU-IG No. 1 fuses from the main body ECU.

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

Tester Display

Test Part

Control Range

Diagnostic

Note

Ignition (MPX)

Ignition switch signal (MPX
signal)/ON or OFF

ON: Ignition switch
ON
OFF: Ignition switch
OFF

-

Ignition (Direct

Signal)

Ignition switch signal/ON or OFF

ON: Ignition switch
ON
OFF: Ignition switch
OFF

-

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Sliding Roof - Tundra

Standard resistance

INSPECT FUSE (S/ROOF, ECU-IG No. 1) RESISTANCE SPECIFICATION

NG: REPLACE FUSE

OK: Go to Next Step

3. CHECK HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY

GROUND)

a. Disconnect the W3 ECU connector.

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

Standard voltage

HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY
GROUND) VOLTAGE SPECIFICATION

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

Standard resistance

HARNESS AND CONNECTOR (SLIDING ROOF ECU - BATTERY AND BODY
GROUND) RESISTANCE SPECIFICATION

Tester Connection Condition Specified Condition

S/ROOF fuse

Always

Below 1 ohms

ECU-IG No. 1 fuse Always

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

W3-9 (IG) - Body ground Ignition switch ON

11 to 14 V

W3-9 (IG) - Body ground Ignition switch OFF

Below 1 V

W3-10(B) - Body ground

Always

11 to 14 V

Tester Connection

Condition Specified Condition

W3-8 (E) - Body ground Always

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Sliding Roof - Tundra

Fig. 19: Identifying W3 ECU Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU) (see
DISASSEMBLY )

SLIDING ROOF HOUSING (FOR CREWMAX)

COMPONENTS

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Sliding Roof - Tundra

Fig. 20: Identifying Sliding Roof Housing Replacement Components With Torque Specifications (For
CrewMax) (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Sliding Roof - Tundra