SUNROOF SWITCH INSPECTION

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1.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)])

2.  Remove the front map light. (See FRONT MAP LIGHT REMOVAL/INSTALLATION [(E)])

3.  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)])

4.  Measure the voltage at each terminal.

•  If the voltage is not as specified in the Terminal Voltage Table (Reference), inspect the parts under “Inspection item (s)” and related wiring harnesses.
―  If the system does not work properly even though the inspection items or related wiring harnesses do not have any malfunction, replace the sunroof switch. (See SUNROOF SWITCH REMOVAL/INSTALLATION)


Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Measured condition

Voltage (V)

Inspection item(s)
1A
GND
Body ground
Under any condition
Approx. 0
•  GND point
•  Related wiring harnesses
1B
LIN
BCM
Terminal used for communication therefore determination based on terminal voltage is not possible.
1C
—
—
—
—
—
1D
—
—
—
—
—
1E
SR_CLOSE
Sunroof motor
Sunroof is closed
B+
•  Sunroof motor
•  Related wiring harnesses
Except above.
1.0 or less
1F
SR_TILT
Sunroof motor
Sunroof is tilted
B+
•  Sunroof motor
•  Related wiring harnesses
Except above.
1.0 or less
1G
SR_OPEN
Sunroof motor
Sunroof is opened
B+
•  Sunroof motor
•  Related wiring harnesses
Except above.
1.0 or less
1H
Power supply (IG1)
F50 15A fuse
Switch the ignition ON (engine on or off)
B+
•  F50 15A fuse
•  Related wiring harnesses
Switch the ignition OFF (LOCK)
1.0 or less