Wednesday, December 30, 2020

TNA-signal (rpm) at CFI control module illogical

My LED diagnostics for my 91 500sl's CFI system, pins 1/16/3 is showing a 7 count, TNA-signal (rpm) at CFI control module illogical. Can I please get some guidance on what this means? I understand that CFI refers to the Continuous Fuel Injection module. I've tried clearing the error and it keep returning. I read the codes with the engine running and with the engine off but the ignition on. Thanks in advance!
My LED diagnostics for my 91 500sl's CFI system, pins 1/16/3 is showing a 7 count, TNA-signal (rpm) at CFI control module illogical.

Can I please get some guidance on what this means? I understand that CFI refers to the Continuous Fuel Injection module. I've tried clearing the error and it keep returning. I read the codes with the engine running and with the engine off but the ignition on.

Thanks in advance!

---------------------------------------------------------------------------
Visit this link to stop these emails: http://zpr.io/t5iAW