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Home >> Saab >> 1996 >> 900 S Convertible L4-2290cc 2.3L DOHC >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Relays and Modules - A/T >> Control Module >> Description and Operation >> Control Module Power Supply
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Control Module Power Supply






BATTERY VOLTAGE (+30 CIRCUIT)
- 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)
- 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.
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