Toyota Tundra Service Manual: Sliding Roof ECU Power Source Circuit

Toyota Tundra Service Manual / Vehicle Interior / Sliding Roof / Sliding Roof System / Sliding Roof ECU Power Source Circuit

DESCRIPTION

If the sliding function and tilt function do not operate, there may be a malfunction in the sliding roof ECU power source circuit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	READ VALUE USING TECHSTREAM (IGNITION SWITCH SIGNAL)

(a) Use the Data List to check if the ignition switch signal is functioning properly.

Click here

Sliding Roof

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

OK:

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

REPLACE SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY (SLIDING ROOF ECU)

2.	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:

Tester Connection	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

Standard Resistance:

Tester Connection	Condition	Specified Condition
W3-8 (E) - Body ground	Always	Below 1 Ω

REPLACE SLIDING ROOF GLASS SUB-ASSEMBLY (SLIDING ROOF ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

Sliding Roof Control Switch Circuit

System Description

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