crankshaft position sensor
 

I have a 1994 Jeep Cherokee "Country" I have been unable to start iti for the past couple of days. I am quite sure the problem lies with the crankshaft position sensor. Does anyone know how to properly test the sensor to determine if it is faulty? My Haynes manual says that there should be no continuity between the "B" and "C" terminals which they say are marked on the connector, however I have no markings on mine. Has any body come across the same problem?
Thanks for any help.:confused:

Re: crankshaft position sensor
 

Hi and welcome to the forum.
First off did you try checking to see if any codes are displayed?

To display codes, cycle the ignition key On-Off-On-Off-On within three seconds. Count the number of flashes, first digit, pause then second digit will be displayed in a series of flashes. (2 flashes, pause, 1 flash = 21)

11 - No Crank Reference Signal At PCM (Crankshaft Position Sensor)
12 - Battery Disconnected Within last 50 Key-on cycles
13 - No Change In MAP Sensor
14 - MAP Voltage Too Low Or Too High
15 - No Vehicle Speed Sensor Signal
17 - Engine Is Cold Too Long
21 - O2 Sensor Signal At Center Or Signal Shorted To Voltage
22 - ECT Sensor Voltage Too Low Or Too High (ECT = Engine Coolant Sensor)
23 - Charge Air Temperature Sensor Voltage Too High Or Low (Intake Air Temp Sensor)
24 - Throttle Position Sensor Voltage Too High Or Too Low
25 - Idle Air Control Motor Circuit Shorted
27 - Injector Control Circuit Signal Not Responding Correctly.
31 - EVAP Purge Solenoid Circuit Open Or Shorted
32 - EGR System Failure
33 - A/C Clutch Relay Circuit Open Or Shorted
34 - Speed Control Solenoid Circuit Open Or Shorted (Vacuum Or Vent)
37 - Torque Converter Clutch Solenoid Circuit Open Or Shorted
41 - Generator Field Not Switching Properly
42 - Auto Shutdown Relay Control Circuit Open Or Shorted Or No ASD Voltage
44 - Battery Temp Sensor Voltage Out Of Limit
45 - Overdrive Solenoid Circuit Open Or Shorted
46 - Charging System Voltage Too High
47 - Charging System Voltage Too Low
51 - O2 Sensor Signal Stays Below Center (Lean)
52 - O2 Sensor Signal Stays Above Center (Rich)
53 - Internal PCM Failure
54 - Sync Pick-Up Signal Not Detected (Camshaft Position Sensor/Ignition Pickup)
62 - PCM Failure SRI Miles Not Stored
63 - PCM Failure EEProm Write Denied

55 End Of Codes
Try this to see if any codes are displayed,it will help localize the problem.

Re: crankshaft position sensor
 

Thanks for the reply, I have tried a new cranshaft position sensor and it has solved my problem. I checked the new one and found that there should be no continuity between any of the leads on the connector. My U/S one had continuity between the 2nd and 3rd lead.
Thanks again. Dave.

Re: crankshaft position sensor
 

My jeep runs fine but has a code of 36? Any idea what that code is?

Thanks Kevin