QuestionQUESTION: I have a 1996 t/c van. just stopped running while I was driving. have checked everything I can find on the net.. I found that the 4 wires going to the coil pack read as follows. #1 pulses, # stays at a staedy 12v. #3 pulses. #4 has a steady 12v. .. Acording to what I've read, #2 wire should pulse. It goes to driver 1. Can you tell me what is driver 1 or where to look next?
ANSWER: Hi Mike,
The dark green/orange is 12V from the ASD which is good because it shows the sensors are working. The other three wire are from the pcm but because I am unclear as to what your numbers refer to (the manual show the dark green/orande to be on #3 not #2) let me tie it to wire color, with the warning that the pin #'s depend upon whether you have a single 60-pin plug at your pcm or two 40-pin plugs (the design changed sometime between '95 and '98): red/yellow goes to pin 2, the dark blue/tan goes to pin 3, and the gray/red goes to pin 11, if you have the 2-plug set-up; otherwise they go to pins 18,17,19, respectively, of the 1-plug set up. All three should show pulsing as you crank the engine. If one doesn't pulse then either the winding of that primary coil or the wire is open or shorted to ground, or you may not have a good connection to the wire for the meter to read it.
You also could check for fault codes using the ignition key:'on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then watch the check engine light which remains 'on' to see it begin to flash, pause, flash, etc. Count the number of flashes before each pause. Then repeat to be sure of an accurate set of flash counts. Combine the counts in pairs in the order of appearance. The two set are always 5 in each, i.e. the number 55, which is the code for 'end of readout'. The other codes are relevant: go to www.allpar.com/fix/codes.html for a code translation. Let me know what the numbers are for a detailed suggestion as to what to do.
Roland
---------- FOLLOW-UP ----------
QUESTION: It is the pin with the gray wire. can you tell me what to go look at next
AnswerHappy New Year, Mike!
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If it is the gray/red wire, then I would check to see if the wire is connected to the pin # I listed for it in my answer (which depends upon whether you have a 1- or a 2-plug set up at the pcm). If it is, then you could check the resistance between the pin at the coil pack that received the steady 12V (dark green/orange) and the pin for the gray/red wire. That is primary winding of that coil in the coil pack. It should about 0.5 ohms. If it reads infinite then the primary coil is 'open' and you need a new coil pack. It it reads ok then it suggests that the pcm may be bad. But do the ignition key test first to see if there is another possible reason for the engine dieing. I find it unlikely that you could have 4 of the cylinders running and the van just die, rather than run badly.
Roland
