2102 390BH starting issue

[dave-g]

Over the winter I had a slight starting issue- that I assumed was low battery voltage. I would turn the key on- let the glow plugs warm- battery voltage would drop to 11.7-12 volts and when I turned the key to engage the started nothing would happen. So i would turn the key off and then back on right to the starter and it would start fine.
But to day I have the same problem but the voltage was 12.6- 12.7. ( on dash display) and it took several time to get it started ( engine not tuning over).


do you think it could be a simple as a the ignition switch? of off to freightliner?

[ceedog]

Did you try battery boost when the engine wouldn't turn over? If it starts with battery boost, you may need chassis batteries.

[dave-g]

2012 39bh



So rv is at freightliner service center- 1st they tell me its a turbo actuator- then the turbo- now they have moved on to the tcm needs to be reprogrammed. I do not have a good feeling.

[dave-g]

Well freightliner was correct . It was the tcm.


They put a different tech on it, He found the neutral lock out relay chattering. Wiring was ok- and it gets the signal from the tcm.


New tcm- programing and labor $2500 +, but just took a 600 mile trip and it started every time.

[Eric B FR Diesel]

Originally Posted by dave-g

Well freightliner was correct . It was the tcm.


They put a different tech on it, He found the neutral lock out relay chattering. Wiring was ok- and it gets the signal from the tcm.


New tcm- programing and labor $2500 +, but just took a 600 mile trip and it started every time.

Good To hear they were able to find the issue...