Measuring voltage
Z-GI-14prose procedureChecks
Measuring voltage at sample circuit points
- 1Use a voltmeter or test lamp to ascertain voltage at the measuring points.
Voltage at measuring points by circuit operation
A
Ignition switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: OFF12V (test lamp ON)
Ignition switch: ON / Thermo switch: ON12V (test lamp ON)
B
Ignition switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: OFF12V (test lamp ON)
Ignition switch: ON / Thermo switch: ON0V (test lamp ON)
C
Ignition switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: ON0V (test lamp ON)
D
Ignition switch: OFF12V (test lamp ON)
Ignition switch: ON / Thermo switch: OFF12V (test lamp ON)
Ignition switch: ON / Thermo switch: ON12V (test lamp ON)
E
Ignition switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: ON12V (test lamp ON)
F
Ignition switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: OFF0V (test lamp OFF)
Ignition switch: ON / Thermo switch: ON0V (test lamp OFF)
NOTE
Legend: ☼ = Test lamp ON; × = Test lamp OFF.
Precautions during checks
CAUTION
A voltmeter lead may momentarily connect a terminal when inserted into the connector and give an erroneous reading when checking for improperly engaged connectors, poor terminal contacts, or loose terminals.
Touch the voltmeter lead to the ground wire when checking the ground circuit.