New PCM install and Code P1637
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Teching In
Joined: Sep 2005
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New PCM install and Code P1637 Can EFILive V2 Commercial be used to flash a new PCM purchased from a GM dealer? I have a 2001 Corvette with a modified tune for a Magnacharger and cam that I want to flash to a new PCM. Also will it use up one of my licenses? I am getting a P1637 code for my alternator and going through the troubleshooting described in the owner’s manual points to the PCM being the fault. If I disconnect the three-conductor terminal on the alternator, turn the ignition to on without starting the engine I read 10.6 VDC at the L terminal. According to the manual this should be about 5 VDC. Disconnecting the connector at the PCM and checking the continuity between it and the L terminal at the alternator the continuity is good. Also, here are no shorts to ground on the lead. There are no shorts between the L terminal of the connector and the other two terminals. With the engine running voltage output randomly jumps around from 12.9 to 15.2 VDC. With the engine running voltage at the L terminal of the alternator is 4.9 VDC. With the engine running I believe the L terminal voltage should be zero. If anyone out there has any other Ideas please let me know.
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Originally Posted by C3vette75
Can EFILive V2 Commercial be used to flash a new PCM purchased from a GM dealer? I have a 2001 Corvette with a modified tune for a Magnacharger and cam that I want to flash to a new PCM. Also will it use up one of my licenses? I am getting a P1637 code for my alternator and going through the troubleshooting described in the owner’s manual points to the PCM being the fault. If I disconnect the three-conductor terminal on the alternator, turn the ignition to on without starting the engine I read 10.6 VDC at the L terminal. According to the manual this should be about 5 VDC. Disconnecting the connector at the PCM and checking the continuity between it and the L terminal at the alternator the continuity is good. Also, here are no shorts to ground on the lead. There are no shorts between the L terminal of the connector and the other two terminals. With the engine running voltage output randomly jumps around from 12.9 to 15.2 VDC. With the engine running voltage at the L terminal of the alternator is 4.9 VDC. With the engine running I believe the L terminal voltage should be zero. If anyone out there has any other Ideas please let me know.
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As for the PCM, yes EFI LIve can flash the new PCM, and yes it will require another one of your licenses to do so.
