Hello everyone,
my name is Martin and I am from Germany, reading on this Forum for quite a while, I decided to get active due to a tech. Problem on my LS400, I hope there is some help here as this seems to be the most qualified Forum, great!
Problem is as follows.
On a big service on my car I made the ultimate 'beginner's mistake' and tried to clean the AFM, which killed it instantly. I got the error code 31, so spent 400 USD for a new AFM.
As the new AFM arrived, I assembled everything, but the CEL is still on with code 31, as I thought the new spare part could be faulty as well, I replaced it, but the replacement didn't change anything. Still CEL on with code 31, rough idle and stalling engine when warm. I checked all the wires from the AFM wiring to the ECU, everything fine, the two brown cables have proper ground, the blue cable is connected correctly to the TPS. The AFM itself is in spec by measuring the resistance according the workshop manual.
I checked also the Idle control valve, which is working fine, as well as the TPS. But they would cause another error code, right? Searched also for vacuum leaks, all hoses and connections OK.
To be honest, I am at the end of my knowledge, so help is very appreciated.
Many thanks for your answers in advance and best regards,
Martin.
my name is Martin and I am from Germany, reading on this Forum for quite a while, I decided to get active due to a tech. Problem on my LS400, I hope there is some help here as this seems to be the most qualified Forum, great!
Problem is as follows.
On a big service on my car I made the ultimate 'beginner's mistake' and tried to clean the AFM, which killed it instantly. I got the error code 31, so spent 400 USD for a new AFM.
As the new AFM arrived, I assembled everything, but the CEL is still on with code 31, as I thought the new spare part could be faulty as well, I replaced it, but the replacement didn't change anything. Still CEL on with code 31, rough idle and stalling engine when warm. I checked all the wires from the AFM wiring to the ECU, everything fine, the two brown cables have proper ground, the blue cable is connected correctly to the TPS. The AFM itself is in spec by measuring the resistance according the workshop manual.
I checked also the Idle control valve, which is working fine, as well as the TPS. But they would cause another error code, right? Searched also for vacuum leaks, all hoses and connections OK.
To be honest, I am at the end of my knowledge, so help is very appreciated.
Many thanks for your answers in advance and best regards,
Martin.
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