1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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The PCM test is performed by making sure that all of its inputs: power, grounds and sensor/switch signals are present and that it's outputs to the relays, coil, injectors, etc are working. PCMs are usually the 'last house on the block' when testing for a 'no start' condition. Everything else, including wiring and connectors has to be ruled out first.
The coil and injectors are powered up (+) at 'key-on' and the PCM controls the ground (-) sides of them for both spark and fuel to the right cylinder at the right time.
A good OBD II code reader/scan tool should be able to tell you if the PCM is seeing these cam and crank signals.
If you lost gauges but the van still ran OK, then that may be a separate problem (like broken cluster solder joints or communications bus issues)? Has a 'no bus' message ever appeared in the odometer?
An 'Authorized Software Update' sticker is still your old PCM with new software: 80bbcfda.gif
Someone may have flashed it to try and remedy a problem. Possibly this current one? Reprogramming a PCM would probably not fix a 'no-start' issue.
The correct PCM part number for yours is 56040325AD for Federal emissions and 56040326AD for California emissions. Remanufactured PCMs would be R6040325AD and R6040326AD respectively.
P1492 is a battery temperature sensor (voltage high) code, and would not keep the engine from starting. The sensor itself may be broken or disconnected.
The coil and injectors are powered up (+) at 'key-on' and the PCM controls the ground (-) sides of them for both spark and fuel to the right cylinder at the right time.
A good OBD II code reader/scan tool should be able to tell you if the PCM is seeing these cam and crank signals.
If you lost gauges but the van still ran OK, then that may be a separate problem (like broken cluster solder joints or communications bus issues)? Has a 'no bus' message ever appeared in the odometer?
An 'Authorized Software Update' sticker is still your old PCM with new software: 80bbcfda.gif
Someone may have flashed it to try and remedy a problem. Possibly this current one? Reprogramming a PCM would probably not fix a 'no-start' issue.
The correct PCM part number for yours is 56040325AD for Federal emissions and 56040326AD for California emissions. Remanufactured PCMs would be R6040325AD and R6040326AD respectively.
P1492 is a battery temperature sensor (voltage high) code, and would not keep the engine from starting. The sensor itself may be broken or disconnected.