QuestionQUESTION: I have a 98 Dakota, 2.5L, Manual Trans.
It was running fine, parked in garage overnight, next morning, would not crank. Turns over, but would not start. Realized that fuel pump was not coming on and replaced it, only to find out that it was not getting power. All fuses and relays are good. Can ground one prong of fuel pump relay with jumper wire and fuel pump will power on when key is turned.
Had "mechanic" come over and determined that I also was getting no spark and no communication with PCM using scan tool. He said it had to be either PCM or anti-theft system.
I believe I have no anti-theft system, so bought PCM online that is supposed to programmed with my VIN and mileage. Installed PCM, with no changes to symptoms.
I've recently seen some posts on other forums that mention "pick up coil" and "crankshaft position sensor". Are either of those likely candidates that would cause these symptoms? I am far from an expert mechanic, and am already kicking myself for wasting hundreds of $ trying to resolve myself, so any help would be greatly appreciated. THANKS.
ANSWER: give me your vin so i can see if u do have an alarm or not
NO: 08-24-00
SUBJECT: Engine Cranks But Does Not Start Or Starts And Stalls
DATE: Sept. 8, 2000
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A VEHICLE THEFT ALARM (VTA) SYSTEM (SALES CODE LSA).
DISCUSSION:
Part of "No Start" diagnosis on vehicles equipped with VTSS should include a verification check of the power supply to the Central Timer Module (CTM). The CTM provides the Powertrain Control Module (PCM) with an "OK To Start" message via the CCD bus. If the message is not received by the PCM, the PCM will not allow the engine to start. Initially, the engine may start and stall but will eventually not start at all. Most CTMs are supplied battery voltage through the power door lock fuse. An inspection of the fuse should be one of the initial diagnostic checks performed. If the fuse is operational, a verification check of the communication system from the CTM can be performed using the DRBIII®. Attempt to communicate to the CTM. If the CTM does not respond to the DRBIII®, the DRBIII® will identify a "No Response From Central Timer Module" message. A "No Response From Central Timer Module" message may indicate that the CTM is not powered up. Please refer to the "Communication" section of the appropriate Body Diagnostic Procedures Manual to assist in "No Start" diagnosis due to communication problems from the CTM. In addition, the "Vehicle Theft/Security" section will aid in the diagnosis of "No Start" issues involving the VTSS system.
POLICY: Information Only
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QUESTION: VIN#: 1B7FL22P5WS647935
Note: that "s" may be a "5".
THANKS for any info.
ANSWER: u dont have an alarm. Can u still not talk to the PCM?
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QUESTION: Thanks for checking on alarm. And that is correct, that I still can not communicate with this PCM either.
AnswerU have 2 commutation systems on the truck for the PCM the data link connector get a volt meter turn the key on and at pin 3 violet and brown u have 2.49 volts and same on pin 11 white and black. The check pin 6 light green and pin 7 pink for same voltage. Let me know what kinda voltages u get on those 4 wires. Plus check to make sure u have power and ground to the PCM itself.
