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Car Forum / Chrysler Cars / September 200498 Voyager Service engine lamp on but no codes?
Hi- The Service engine lamp on our 98 Grand Voyager came on and I had the computer scanned at the local parts store. The OBDII tester says nothing is wrong, but the light is lit and apparently because there are no codes, OBDII won't allow a lamp reset. Anyone ever run in to this? Thanks- Carl > Hi- > The Service engine lamp on our 98 Grand Voyager came on and I had the [quoted text clipped - 4 lines] > > Thanks- Carl I'd say take it to a dealer or qualified repair shop that knows what they are doing and has the right equipment to diagnose your problem The MIL lamp doesn't come on for no reason. Matt > > Hi- > > The Service engine lamp on our 98 Grand Voyager came on and I had the [quoted text clipped - 10 lines] > > Matt You would think so, but the OBDII tester shows that the processor believes the light is "off"- in other words, as far as the processor is concerned, there is 'no reason' for the light to be "on". -Carl It may not be a good enough unit. Also there are "driveline specific" codes that only an DRB from mopar can pick up or a snap on unit. Take it in to a qualified tech with a mopar scanner. Larry > > > Hi- > > > The Service engine lamp on our 98 Grand Voyager came on and I had [quoted text clipped - 19 lines] > > -Carl By any chance did this vehicle just pass the 60,000 mile mark? > It may not be a good enough unit. Also there are "driveline specific" > codes [quoted text clipped - 25 lines] >> >> -Carl > By any chance did this vehicle just pass the 60,000 mile mark? About 53000 miles ago <g>. -Carl >>>Hi- >>>The Service engine lamp on our 98 Grand Voyager came on and I had [quoted text clipped - 23 lines] > believes the light is "off"- in other words, as far as the processor > is concerned, there is 'no reason' for the light to be "on". Then it appears that one of two things is wrong: 1. The right tester isn't being used or it is being used incorrectly. 2. The computer itself is bad and may have a failed output. I'm pretty sure my 96 Voyager has problem number two on the pin that controls the rear washer. The washer came on and stayed on. I had to unhook the pump to kill it. The dealer couldn't find the problem and was blaming a short in the wiring. Well, I unplugged the big connector to the BCM that holds the pin for the rear washer and then it stopped pumping. The pump is activated by switching the ground lead as the pump(s) are powered directly from the power distribution center. It appears that the output has either failed with a short to ground internally, or the software otherwise things the pump is being commanded to be on. Since the HVAC switch panel talks to the computer via a bus rather than discrete signals, I didn't have the equipment to troubleshoot it any further. However, unplugging the HVAC/wiper controls didn't have any affect on the status of the output pin on the BCM so I'm fairly confident that the issue isn't bogus commands from the washer switch switch. It could be that you have the same problem. Matt > >>>Hi- > >>>The Service engine lamp on our 98 Grand Voyager came on and I had [quoted text clipped - 47 lines] > > Matt That makes more sense than the "it's a cheap tester" theory (But, I'm going to take it over to my friend's garage and see what his megadollar scan tool says). I was always under the impression that OBDII was developed to eliminate the need for manufacturer-specific scan tools. The transmission shifts just fine and all the accessories work but the van has 100K plus Central New York miles on it, so there is a good chance that I'm looking at a corrosion or loose plug problem. -Carl > > >>>Hi- > > >>>The Service engine lamp on our 98 Grand Voyager came on and I had [quoted text clipped - 65 lines] > OBDII was developed to eliminate the need for manufacturer-specific > scan tools. No, not at all. OBDII was developed with the idea to make the car computer smart enough so that it can self-diagnose the emissions control systems, so that inspection stations can plug in a tester that talks to any car computer and decides if the car is a polluter or not. It was also thought a good idea to define many of the codes common to all vehicles. But the manufacturers can and do add codes that are far in advance of the stuff that ODB defines. Ted well thats the problem the ns van is a obd3 emission configuration > > > Hi- > > > The Service engine lamp on our 98 Grand Voyager came on and I had [quoted text clipped - 19 lines] > > -Carl there is the trans controller. which can turn on the lite and some scan tools the (cheaper one's)can't access the codes take it in before it's too late > Hi- > The Service engine lamp on our 98 Grand Voyager came on and I had the [quoted text clipped - 4 lines] > > Thanks- Carl |
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