How do you check the resistance on a crankshaft sensor?
In case the car’s manual states a resistance value, you can check the sensor without having to crank the engine as well. Set the meter to ohms and check the resistance with what is specified in the service manual.
How to test the crank sensor on a 4.3L engine?
SUGGESTION 2: It’s very important that the Spider’s fuel injector’s connector be disconnected while performing the crankshaft position sensor test. Unplugging this connector will disable the computer from injecting fuel into the engine. You don’t need any expensive tools to test the crank sensor on your 4.3L, 5.0L, 5.7L engine. Multimeter.
When does a crank sensor go bad PCM?
The PCM will usually NOT set a specific bad crankshaft position sensor diagnostic trouble code (DTC) when the crank sensor goes rogue (goes bad). But, every now and then it does, and when it does you’ll get:
How does the crank sensor work on the ignition module?
When the engine starts to crank, the crankshaft position sensor starts to produce and send its signal to the ignition control module (ICM). The ignition control module upon receiving this AC Volts crank signal, converts it into a DC digital signal and sends it to the ECM.
What does a bad crankshaft sensor reading mean?
Set up the scanner to read engine RPM and crank the engine. The scan tool should read between 100 and 500 RPM. A bad reading indicates that the crankshaft sensor isn’t working right. A reading of zero indicates that the crankshaft sensor has failed completely.
What does infinite resistance mean on a crankshaft sensor?
Infinite resistance means there is an open circuit. Either one of those readings indicates that the sensor is not working. For any other reading, check it against the manufacturer’s specifications. If your reading is not close to the recommended resistance, then you should replace the sensor.
What should the crank sensor be at 68 degrees F?
Your meter must be acting weird, the crank sensor should measure about 1k ohms at 68 degrees f. What resistance scale are you using? x1, x10 x 100 x1000 ?? Like I said before, if you are getting a voltage reading when crank over the engine , about 1 -2 volt pluses, then the sensor has to have continuity.
How do you test a crank sensor?
Another way to test the crankshaft sensor with a multimeter is by checking the output voltage with the engine cranking. You will need an assistant to do this. Be very careful around moving parts as you do this. Probe the wiring connectors and measure the output voltage in AC millivolts.