Diagnosis Procedure
1.
CHECK LIN COMMUNICATION SIGNAL
Ignition switch OFF.
Disconnect sunroof motor assembly harness connector.
Ignition switch ON.
Check signal between sunroof motor assembly harness connector and ground using an oscilloscope.
(+)
(−)
Signal
Sunroof motor assembly
Connector
Terminal
R4
9
Ground
Is the inspection result normal?
INSPECTION END
.
2.
CHECK LIN COMMUNICATION CIRCUIT
Ignition switch OFF.
Disconnect BCM connector.
Check continuity between BCM harness connector and sunroof motor assembly harness connector.
BCM
Sunroof motor assembly
Continuity
Connector
Terminal
Connector
Terminal
M18
24
R4
9
Existed
Is the inspection result normal?
Replace BCM. Refer to
Removal and Installation
.
Repair or replace harness.