I jumped the crank switch. same effect
You jumpered crank pulse sensor? Why?
Don’t make
any changes to system to troubleshoot, you’ll fry something and/or introduce additional errors into system. Passive measurements only and let
numbers tell you exactly what’s wrong and how to fix it.
It’s like going to doctor, “
We think your tiredness is because of weak heart. Let’s swap in another one to see if you feel better!” Nah, first up is always series of tests to gather numbers like BP, RHR, BMI, A1C, BUN, etc. Then based upon numbers, fault is identified 1st, before any corrective actions are taken.
These are not reed-switches like old-style speedos. They’re VR - variable reluctance sensors that have voice-coil over magnet and outputs an analogue waveform when trigger teeth flies past them.
Looks like this on oscilloscope:
ECU uses combination of cam & crank VR sensors to determine engine position and speed.
Codes 18 & 19 are for following conditions on CMP/CKP sensors:
1. loose or poor contact on cam/ignition pulse generator (high ohms out of range)
2. open or short-circuit in cam/ignition pulse generator (infinite ohms/OL or
zero ohms)
3. faulty cam/ignition pulse generator (improper signal)
By jumpering crank sensor connector, you’ve created fault #2 in circuit on top of any existing errors.
Common failure point on these bikes, check the wiring and the sensor.
By this, he means pull out meter, follow procedure in manual and
measure.
1. Since this isn't a switch, sensors have coils with measurable impedance. Measure resistance of sensor at its connector, should be 400-600 ohms.
2. Measure sensor resistance again at ECM connector. This verifies wiring is OK between sensor and ECM. Doesn't matter one bit if sensor is perfectly OK if signal never makes it to ECM
3. Measure resistance of each sensor-wire to chassis-ground to verify it's not frayed and shorted to metal nearby. Some of these wires run across very hot metal and may have contacted something to melt insulation off.
4. measure peak VAC output of sensor at ECM connector when cranking. Should be > 0,7 VAC
These measurements being out-of-spec are possible causes behind error #18 & 19. When resistance-measurement of sensor is outside of normal range, ECM throws code. Or if signal doesn't meet minimum output levels.