2001 Dodge Truck Electrical

BAMA9238

MEMBER
2001 DODGE TRUCK
125,000 MILES

I have no spark from battery to ignition coil. Or to the distributor, I was driving 60 when I speed up it pop a few times then went dead. Will crank but no spark. Have replaced ignition coil, rotor cap and rotor with pickup sensor. Battery is charge up, plugs ok, 2001 ram sport 5.9 ext cab auto
If I could give a donation I would but I'm 70 years old and flat broke. If you can help would be thank full.

Image (Click to make bigger)

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Have you checked the crank sensor? The crank sensor, located on the back of the engine, runs off the flywheel/driveplate and provides the ECM with crankshaft position and engine speed. If it is bad, you won't get spark.

Here are directions to check the sensor and diagnostic if it is good. I found these directions and feel they are good.

Remove the engine cover.
Using the DRB-II scan tool or equivalent, plug into diagnostic connector and erase DTCs.
Turn ignition OFF and then ON again.
Crank engine until starts or for 10 seconds, whichever first. Monitor Crank Signal on scan tool. If Crank Signal is detected, CKP sensor is OK, if No Crank Signal is detected, proceed with diagnostics.
Inspect wiring and connectors and repair as necessary and retest. If the wiring and connectors are OK, proceed to the next step.
With the ignition OFF, unplug the CKP sensor signal. Using a voltmeter, check the supply voltage using supplied schematics.
On 1995 and earlier vehicles, it should be 7.0v or more; if not, repair circuit and retest. If voltage is OK, proceed to next step.
On 1996-98 vehicles, it should be 4.5v or more; if not, repair circuit and retest. If voltage is OK, proceed to the next step.
Using the scan tool, erase DTCs in the ECM, then turn the ignition OFF and install a jumper wire on the CKP signal circuit. Turn the ignition ON.
While observing the display on scan tool, tap the other end of the jumper wire to the sensor ground. If the scan tool shows No Cam Sync, replace the CKP sensor. If the scan tool shows a Cam Sync, proceed to next step.
With the ignition OFF, using an ohmmeter probe the ground signal on the CKP sensor connector, measure the resistance between the connector and ground. If it is less than 5.0 ohms, proceed to the next step; if it is more than 5.0v, repair the circuit and retest.
Disconnect the negative battery cable.
Disconnect the ECM wiring harness. Inspect for any damaged pins or connector terminals and repair and retest if necessary.
Using an ohmmeter, test the CKP signal circuit between CKP connector and ECM connector for resistance. If it is less than 5.0 ohms, proceed to next step, if it is more than 5.0 ohms, repair the circuit and retest.
Plug in the CKP sensor connector.
Using an ohmmeter, measure the resistance between the CKP signal circuit and CKP ground at the ECM connector. If resistance is less than 5ohms, repair the short in the CKP signal wire. If the resistance is more than 5 ohms, replace the CKP sensor.