Control module power supply
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Control module power supply
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The main relay, fuel pump relay and fuse 17 are supplied with current from the +30 circuit via maxifuse 2. Control module pin 23 is supplied with current from fuse 17.
The control module uses +30 for its memory.
Control module pin 43 is supplied with current from the +15 circuit via fuse 27. The control module is activated when current from the +15 circuit is applied to pin 43.
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If no current from either the +30 or +15 circuits is present, the engine will not start and the system cannot be contacted with the diagnostic tool.
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When the ignition is ON, the main relay is operated.
Control module pin 1 is supplied with current from pin 87 of the main relay via fuse 14. This connection is used internally to supply the throttle motor with current.
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If no current is supplied to the control module from the main relay, diagnostic trouble code P1640 will be generated, the throttle will close and the engine will stop.
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