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Car Forum / Oldsmobile Cars / December 200596 Olds Achieva Still No START!! HELP!
I apperciate the reply for the possible ignition switch failure. Come to find out the switch has been replaced twice already! I remove the cluster and checked the 12 bat feed and the 12v ignition feed and they both are always there. Sometimes the lights all come on and it starts right up and sometimes it will not do a bulb check, you wait 5 minutes or so and they all come on and the car runs. I have noticed as I sit with the car it will sometimes just turn the dash lights on and be ok for few minutes and then shut them off and on and off? Does anyone have any idea where i should go next... Not even the dearler could figure it out! Thanks If you have 12 volts where you are supposed to then another possibility is the ground side of the circuitry is not intact. Can you check a common ground conductor in the dash area? With the key off you should measure extremely low resistance to a known good ground (such as the battery negative terminal). With the key on you should have very, very low voltage at the dash ground (like zero or a few tenths of a volt at most). >I apperciate the reply for the possible ignition switch failure. Come to >find [quoted text clipped - 13 lines] > > Thanks All of the grounds are ok. Are there any relays that would have to do with a bulb check? Is there a way to check the pcm? Or the instrument cluster? Thanks Mike On a '98 Achieva diagram it shows the bulb test being triggered when the ignition switch grounds terminal C7 on the cluster. No relays involved that year. Don't have a schematic for a '96. Do you have access to a scanner that can probe the computer's brain? If your machine is equipped with the PASSLOCK theft system it might be at the root of your problem. Here is a diagnosis chart for that system: Document ID# 487982 1998 Oldsmobile Achieva -------------------------------------------------------------------------------- Vehicle Theft Deterrent (VTD) Operation Changing VTD Components Important Due to component variability, the vehicle theft deterrent (VTD) system must have the learn procedure performed regardless, if the vehicle starts on the first ignition cycle after a VTD repair. All codes in the theft deterrent module must be cleared for a relearn. If various theft deterrent parts are changed the PASSLOCKT System is designed to prevent theft. Parts that cannot be changed without the possibility of going into a tamper mode are: PASSLOCKT Instrument Cluster Powertrain Control Module (PCM) If any of these parts are replaced, the vehicle may start and stall for 10 minutes (Long Tamper Mode). If this occurs, the system MUST go through a Long Tamper Mode cycle. The THEFT indicator will be flashing for 10 minutes. The instrument Cluster and Powertrain Control Module (PCM) require the 10 minutes to complete a learn cycle. The ignition switch MUST remain in the RUN position until the indicator stops flashing or the cycle will have to be repeated. Step Action Value(s) Yes No 1 Replace the failed component. Are all of the connections plugged in? -- Go to Step 2 -- 2 Start the vehicle. Did the vehicle continue to run? -- Go to Step 3 Go to Step 4 3 Did the Theft telltale turn off (may take 10 seconds)? -- System OK Go to Step 7 4 Is the Theft telltale flashing? -- Go to Step 5 Go to Step 2 5 Is the Theft telltale flashing for longer than 10 seconds? -- Go to Step 6 Go to Step 7 6 Leave the key in the run position until the telltale turns on solid--takes approximately 10 minutes. -- Go to Step 2 -- 7 Replace the vehicle Theft Deterrent Component. Is the repair complete? -- System OK -- > All of the grounds are ok. Are there any relays that would have to do with > a > bulb check? Is there a way to check the pcm? Or the instrument cluster? > > Thanks > Mike Hello again... Well I have no way to check the pass lock on this vehicle and the part is 250 bucks, but juding by the diagram the bulb check should still happen even if the pass lock was faulty. The theft light does not flash or stay illuminated. Is it possible that the cluster could be causing it not to start if it was bad? Can't answer your question about a bad cluster preventing a start. It communicates with other modules over the UART data line, so if that communication link is corrupted or disrupted perhaps strange behavior could ensue. Have you visually checked all the pertinent connectors for signs of burning, corrosion, or looseness on the individual pins, male and female (including the Powertrain Control Module)? You might try posting your problem on alt.autos.gm. There are people there who have far more expertise than I. They may be able to help you in short order. > Hello again... Well I have no way to check the pass lock on this vehicle > and [quoted text clipped - 4 lines] > to > start if it was bad? |
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