wiring trouble shooting 101 need help

NYSpeed Automotive
1

problem no VSS signal. here is what I got so far.

Turn meter on

test meter

this is a old VSS I had laying around from over 3 years ago. all data says the following

Is resistance between 190 and 250 ohms?
the meter is showing a near short correct? in other words a bad sensor.

this is the VSS I just removed from the car and is about a year old. This also shows the same thing as the last sensor. does this mean I have two bad sensors in my possession?

PCM harness pin 3 and pin 6

again PCM harness pin 3 and pin 6. the other side of the harness is disconnected so shouldn’t the meter show nothing or open circuit?

this is what alldata has to say.

  • Key “OFF”.
  • Disconnect Powertrain Control Module (PCM) . Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
  • Install breakout box, PCM disconnected.
  • Disconnect Vehicle Speed Sensor (VSS) .
  • Measure resistance between test pin 3 at the breakout box and VSS (+) circuit at the VSS vehicle harness connector.
  • Measure resistance between test pin 6 at the breakout box and VSS (-) circuit at the VSS vehicle harness connector.
  • Is each resistance less than 5.0 ohms?

Yes – Go to DP3. See: DP3 - Check VSS Signal Harness For Shorts to Power or Ground
No – Service open circuit. Remove breakout box. Reconnect all components. Repeat test step DP1 drive cycle to verify elimination of Diagnostic Trouble Code (DTC) or drive complaint. See: DP1 - Complete VSS Drive Cycle

same pic from above just with less harry arm and more meter.

I must be reading this meter wrong because i’m seeing about 22ohm right? help me out here

2

kinda looks like the sensor is bad.

for the wiring test. they are saying to measure the resistance of each wire from the ECM connector to the VSS connector. i dont have a wiring diagram to determine what else might be connected to that circuit to cause what appears to be a 22 ohm resistance across those terminals.

Brian

3

that is what I don’t get. There is nothing inline and nothing connected at the other end unless something is built into the connector which would be odd. here is the diagram for the circuit.

4

the first thing i would do is get a nice digital multimeter.

5

i dont see a wiring diagram?

Brian