Measuring continuity/resistance
Z-GI-15prose procedureChecking switches
Touch the ohmmeter leads to the switch terminals to check continuity.
CAUTION
Verify the operating state of the switch before checking continuity because readings vary accordingly.
Checking diodes
Continuity is checked according to the direction of the positive (+) and negative (–) leads of the ohmmeter in the circuit containing the diode.
Diode continuity by ohmmeter lead connection
Ohmmeter (+) lead to diode cathode, (–) lead to diode anode (forward biased per ohmmeter internal-battery polarity)
ContinuityYes
Ohmmeter (+) lead to diode anode, (–) lead to diode cathode (reverse biased)
ContinuityNo
NOTE
Remark: The negative (–) lead of the ohmmeter is connected to the positive terminal of the internal ohmmeter battery. The positive (+) lead to the negative terminal of the battery.
Checking sensors, solenoid valves
Connect the ohmmeter leads to the sensor or solenoid valve terminals to check resistance.
CAUTION
Verify the operating state of the sensor before checking resistance because readings vary accordingly.
Checking condensers
Checking condensers (capacitors)
- 1Short between the terminals with a jumper wire to discharge the capacitor.
- 2Set the ohmmeter range to ×10kΩ and connect it to the capacitor terminals.
- 3The capacitor is good if the needle of the ohmmeter swings once and returns to its original position.
