200SX L4-1998cc 20L DOHC MFI (SR20DE) Idle Speed/Throttle Actuator - Electronic Diagrams
NOTE: In the illustration there is an excessive 4.1 volt drop between the battery and the bulb.
Measuring Voltage Drop - Step By Step
A step by step voltage drop test can be used to identify a component or wire which is operating under too much resistance. It is most useful in isolating
excessive drops in low voltage/current systems such as those in Computer Controlled Systems..
Circuit Inspection
1.
Connect the voltmeter as described in illustration, starting at the battery and working your way around the circuit.
2.
An unusually large voltage drop will indicate a component or wire that needs to be repaired. As you can see in the illustration above, the poor
connection causes a 4 volt drop.
The chart that follows illustrates some maximum allowable voltage drops. These values are given as a guideline, the exact value for each component
may vary.
COMPONENT
VOLTAGE DROP
Wire
<.001 volts
Ground Connections
Approx. 0.1 volts
Switch Contacts
Approx. 0.3 volts
Starter Solenoids
Approx. 0.5 volts
How to Follow This Flowchart
How To Follow This Flowchart-Work And Diagnostic Procedure