900 S Hatchback L4-2290cc 2.3L DOHC EFI (1997)
Control Module: Description and Operation
Control Module Power Supply
BATTERY VOLTAGE (+30 CIRCUIT)
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The transmission control module is continuously supplied with battery voltage (+30 circuit) on pin 18. The control module uses this voltage as a
back-up for the memory. Current consumption on back-up is less than 1 mA.
BATTERY VOLTAGE (+15 CIRCUIT)
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When the ignition switch is in the Drive position, the transmission control module is supplied with current (+15 circuit) on pin 17. This current is
necessary in order to activate the control module.