No Start, No Spark, No Injector Pulse (faulty crank sensor)
No Start No Spark Case Study
1997 Lincoln Continental 4.6
How to test a VR type crank sensor. (VRS)
This is a great video if you are looking for tips on finding direction on
any no spark problem.
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like to be part of my on-line class.
No Crank Diagnosis (how to troubleshoot starting system problems)
2000 Dodge Neon Case Study. This video contains theory and operation of the
starting system as well as troubleshooting on the vehicle. Even though this
is a vehicle specific case study, the information in this video is useful
for troubleshooting all starting systems.
Crank Sensor Quick Fix
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Crank Sensor Quick-Fix
There are two types of crank sensors, and two types of tests, the 2 and 3
wire sensors. Here are the flash points for the crank sensor testing.
1) The 2 wire crank sensor generates a voltage, and is quick tested with a
2) To test the two wire sensor, disconnect the crank sensor, ignition key
on, hook the test light to battery power, and tap at each crank sensor
terminal repeatedly. A spark click and injector pulse should be seen.
3) The 3 wire sensor has its own circuit, with 5 to 8 volt power, ground,
and signal wires. Identify the signal wire using volt meter or diagram.
4) Take the test light and connect to battery ground. With key on,
disconnect crank sensor, and repeatedly tap on the signal wire. You should
hear a spark click and injector noid pulse.
These are to test the ECM crank sensor circuit response. On both tests, you
should see a spark click and injector pulse. Crank sensor is the main input
to the ECM. If ECM working, then the crank is the only other issue. There
are other ways to test, but involve an oscilloscope and more complex. This
concludes the cranks sensor Quick-Fix.
How to identify a bad main relay on a Honda (PGM-FI)
1999 Honda Accord No Start (case study)
For more on Engine Performance Diagnostics go to my website at
I am doing field work in this video on a 1999 Honda Accord with an
intermittent no start complaint. Other symptoms include: stalling, long
crank times, surging, bucking, poor transmission shifting.