Bosch Evolution 300 Series Service Manual page 56

Gas Range Component Testing
If a component part that is controlled by the control module fails to
operate the cause could be due to a defect in the control module,
faulty wiring harness connections , or the nonfunctioning component.
Component parts such as elements, fan motors, lock motors, etc. can
be tested with a simple continuity check using an ohmmeter. Verify
the continuity of the component and the wiring circuit between the
component to the control module first.
If the component and wiring connections are good test the output
voltage from the control module to the component part.
3:8
GAS Range Component Resistance Chart
NOTE: Resistance measurments are approximate. Variations due to
temperature changes and other factors are normal.
COMPONENT
CONVECTION FAN MOTOR
WINDINGS
LOCK MOTOR WINDINGS
GAS SAFETY VALVE
BAKE IGNITER
BROIL IGNITER
OVEN TEMPERATURE SENSOR
PROBE ( AT ROOM TEMPERATURE)
** Never apply line voltage to the oven safety valve terminals.
RESISTANCE Ω
VOLTAGE
RATING ( OHMS)
108 / 232 15 Ω
108 / 232 2000 Ω
** 1.5 Ω
108 / 232 100 Ω
108 / 232 80 Ω
- 1100 Ω *
*( )
REFER TO RTD CHART