SLIDING ROOF / CONVERTIBLE: SLIDING ROOF SYSTEM: DESCRIPTION (2008 LX570)

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Last Modified: 11-27-2007		1.6 J
Service Category: Vehicle Exterior	Section: Sliding Roof/Convertible
Model Year: 2008	Model: LX570	Doc ID: RM000001VJT00IX
Title: SLIDING ROOF / CONVERTIBLE: SLIDING ROOF SYSTEM: DESCRIPTION (2008 LX570)

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.

1.	READ VALUE USING TECHSTREAM (ENGINE SWITCH SIGNAL)

Tester Display

Test Part

Control Range

Diagnostic Note

Ignition (Direct Signal)

Engine switch signal/ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off

Ignition (MPX)

Engine switch signal (MPX signal)/ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off

OK:

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

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

(a) Remove the S/ROOF and ECU-IG No. 2 fuses from the main body ECU.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
S/ROOF fuse	Always	Below 1 Ω
ECU-IG No. 2 fuse	Always	Below 1 Ω

3.	CHECK HARNESS AND CONNECTOR (SLIDING ROOF DRIVE GEAR - BATTERY AND BODY GROUND)

(a) Disconnect the R5 drive gear connector.

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

Standard Resistance:

Standard Voltage

Tester Connection	Condition	Specified Condition
R5-2 (E) - Body ground	Always	Below 1 Ω