Hello.
This is my first post here and I could not find ANY information on this fault code at all. The truck is a 2014 Freightliner Cascadia day cab, with a Detroit DD13. It is throwing multiple codes for the aftertreatment system such as NOx sensor codes and a regeneration cannot complete code. The main one I am trying to fix at the moment is coming from the ACM21T module (aftertreatment module), SPN 1669 FMI 9. The only thing I know about the code is that it means "CAN4 No Signal". Detroit is being switched over to new computers at the shop so I cannot access PSL until tomorrow night. I measured continuity on the aftertreatment wiring harness and everything is okay there. No fuses are blown. I couldn't seem to find any terminating resistors on the aftertreatment side, but I reading the resistance through the diagnostic connector is reading okay. Any ideas? any help is appreciated.
Thanks.
Freightliner ACM CAN4 no signal
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by lawnman18596, Jan 5, 2021.
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I am not seeing spn1669 in the GHG14 troubleshooting manual. I found it in the GHG17 manual though. I am attaching the fault diagnostic steps.
Attached Files:
Volvoowner007 and lawnman18596 Thank this. -
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any update on this, what was the resolve?
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