Starting System: Overview Saab 9-3 II

Scheme 1

Scheme 2

1. Remove the battery cover.
2. Disconnect the negative battery cable.
3. Raise the car.
4. Disconnect the starter motor connecting cables.
5. Remove the starter motor retaining bolts.
6. Lower the starter motor and lift it out.

Scheme 3

Scheme 4

1. Lift the starter motor into place.
2. Fit the starter motor retaining bolts. Tightening torque 47 Nm (35 lbf ft)
3. Clean, apply Vaseline and connect the starter motor connecting cables.
4. Lower the car to the floor.
5. Connect the negative cable of the battery.
6. Fit the battery cover.
7. Reset the car; see «PROCEDURE AFTER BATTERY DISCONNECTION»(ref-275861-S35345021442007122900000) .

Scheme 5

1. Remove the battery cover.
2. Remove the negative battery cable.
3. Raise the car.
4. Remove the secondary air pump. See «SECONDARY AIR INJECTION PUMP MOTOR (326)»(ref-275849-S07408538862007122900000) .
5. Detach the starter motor connecting cables.
6. Remove the starter motor.

Scheme 6

1. Fit the starter motor. Tightening torque 47 Nm (35 lbf ft)
2. Connect the cables to the starter motor.
3. Fit the Secondary air pump.
4. Lower the car.
5. Fit the negative battery cable.
6. Fit the battery cover.
7. Reset the car; see «PROCEDURES AFTER BATTERY DISCONNECTION»(ref-275861-S35345021442007122900000) .

Starter motor, detailed description

The starter motor has permanent magnets to reduce the stress on the battery. The starter motor has a planet gear to increase the starting torque.

The starter motor circuit consists of two sub-circuits

1. the operating circuit.
2. the working circuit, and

Operation

When the ignition key is turned to start position, the starter relay will be activated provided the immobilization criteria are fulfilled and the control current circuit to the solenoid, connection 50, will be made. The solenoid engages the pinion with the gear ring on the engine flywheel and closes a switch so that the starter motor commutator is supplied with voltage via slip brushes from connection 30.

Scheme 7

Once the engine has started and the engine speed has exceeded the starter motor RPM, the pinion is disengaged from its shaft via a free wheel, preventing the starter motor from overrevving. Releasing the ignition key breaks the starting circuit and the operating circuit to the solenoid, whereby a spring returns the pinion to its rest position.

Scheme 8