9-5 Aero Wagon (9600) L4-2.3L Turbo (B235) HO (2001)
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When the ignition is turned to the "OFF" position1 the main relay will operate for a further 10 seconds to enable adaptation of the throttle valve to fully
closed position.
Diagnostics
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If There is an open circuit or short circuit to ground, diagnostic trouble code P1652 will be generated.
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If There is a short circuit to B+, diagnostic trouble code P1653 will be generated.
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If the current to Control module pin 1 is missing, diagnostic trouble code P1640 will be generated, the throttle will close and the engine will stop.
NOTE: In Trionic T7, the main relay is always active when the ignition on. The current from the main relay can be read with the diagnostic tool.
