9-3 Convertible (9400) L4-2.0L Turbo (2.0 HOT) (2003)
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Diagnosis
There are no diagnostics for the main relay. The symptom could be that the pump motor is inactive when operating the ROOF switch. The STC control
module will generate a diagnostic trouble code for one of the switches or microswitches.
When the soft top cover is to be opened, an oil pressure is required on the "pull side" of the oil pump. The STC control module sends B+ to pin 27 and
the "pull" pump motor relay feeds the pump motor, which is grounded through the "push" pump motor relay.
When the soft top cover is to be closed, an oil pressure is required on the "push side" of the oil pump. The STC control module sends B+ to pin 42 and
the "push" pump motor relay feeds the pump motor, which is grounded through the "pull" pump motor relay.
The motor is provided with overheating protection to prevent overheating.
