cummins hard to start
#1
cummins hard to start
When i want to start my truck in the morning or even let it sit for like an hour its very hard to start and i have to bump the key to let the fass run then it will start. i put it in the shop and they said it needed a new computer so i did that and it still didnt fix the problem it has a brand new vp-44, it has 20 psi on the fuel when running. imput please i am beating my head against the wall trying to figure this out.
#6
#7
Diesel Bomber
iTrader: (1)
P1693 (M) DTC Detected in PCM/ECM or DTC
Detected in ECM
A 9Companion DTC9 was set in both the ECM and PCM.
P1694 Fault In Companion Module No CCD/J1850 messages received from the powertrain
control module-Aisin transmission
P1694 (M) No CCD Messages received from
ECM
Bus communication failure to PCM.
Detected in ECM
A 9Companion DTC9 was set in both the ECM and PCM.
P1694 Fault In Companion Module No CCD/J1850 messages received from the powertrain
control module-Aisin transmission
P1694 (M) No CCD Messages received from
ECM
Bus communication failure to PCM.
#9
Diesel Bomber
iTrader: (1)
The fault code that we need to be concerned about is P1694, it means that there is a communication problem between the ECM(Cummins controller) and the PCM(powertrain control module) . The modules communicate over the ccd bus. The ccd bus is a two wire communication system that allows the computers to talk to each other. This ccd bus is going down and causing your problems.
The first thing I would check is the main large connector in the fuse box in the engine compartment. Make sure the connector is bolted down all the way and you can't pull it up. I am thinking we are losing a power or ground to the ECM and we need to start by checking that connector and make sure all the fuses are inserted all the way.
The first thing I would check is the main large connector in the fuse box in the engine compartment. Make sure the connector is bolted down all the way and you can't pull it up. I am thinking we are losing a power or ground to the ECM and we need to start by checking that connector and make sure all the fuses are inserted all the way.
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