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Control Module: Diagnostics

WARNING: This page is about a different car, the 2007 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.

In the event an internal fault in the control module, diagnostic trouble code B1605 is generated



If there is no power supply then background lighting does not come on when the ignition is switched on.

Fig 1: Control Module Power Supply Circuit Diagram
G05044817Courtesy of SAAB-SCANIA OF AMERICA, INC.


If ground is not present, the display will not light up when the ignition is turned on.

If sensor ground is short-circuited to 5 V or B+ then diagnostic trouble code B2945 is generated.

Fig 1: Sensor Ground Circuit Diagram
G05044819Courtesy of SAAB-SCANIA OF AMERICA, INC.
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