Hej. Har en v70 som får felkod och går slött på felkod.

Felkoden är 135F Alltså lmm.
Denna är bytt och adapaterad, problemet kvarstår.

Bytt Tmapsensorn på intercoolern
Felkoden kvarstår.

Virvelspjäll fungerar och bilen sätter ingen egen felkod på det.

Symptomen är att efter nollat felkod kan bilen gå som ett skott utan felkod i allt från 5min - 50 min. Men då felkoden kommer så känns det som att den klipper på turbon, "limp mode"

Luftmassan mätt i mg så utan felkod är värdena bra, Men på felkod får den tuppjuck och visar 100 - 200mg mer på tomgång än börvärde och på fullgas 100 - 200 för lite.

Laddtryck ligger bra tills felkod kommer.

Lambdan kan däremot få riktigt spel och ligga på typ 9.0 - 10.09 på felkod och med nollade felkoder 1-2,

Insugstemp var med gamla mapsensorn stadiga 69grader, Nu med den nya 79grader.

Detta är vad jag kommit fram till. Luftläckage till turbon borde jag ha en felkod på 1507 som betyder lågt turbotryck vilket jag inte har. Utan har endast felkod 135F Luftmassemätare signal felaktig.

Vad har jag missat? Vart går jag vidare? Känns som att jag måste börja om från början och vara mer nogrann.

Vad mer lirar med lmm och kan få den att sätta fel värden?

Ingen som vet?

http://www.motor-talk.de/forum/fehlerco … 68859.html

284: ECM-135F Mass air flow (MAF) sensor. Signal too low



Diagnostic trouble code (DTC) information ECM-135F



Condition

The engine control module (ECM) continuously monitors the mass air flow sensor signal for plausibility and follows the characteristics of the mass air flow sensor.

If the engine control module (ECM) detects that the signal from the mass air flow (MAF) sensor is incorrect the diagnostic trouble code (DTC) is generated.

Note that malfunction of the swirl valve can cause the diagnostic trouble code to be generated.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.



Substitute value

Torque limitation

An estimated mass air value is used.

Possible source

If diagnostic trouble code ECM-135F has been stored together with ECM-1507, the fault is probably due to a leak on the hose or connection between the turbocharger and intake valves.

Incorrect camshaft position.

Damaged mass air flow (MAF) sensor.



Fault symptom

Driving/Poor performance/lacks power Poor performance.

Message in information display
Zitat:





284: ECM-135F Mass air flow (MAF) sensor. Signal too high, D5244T4

Print



Diagnostic trouble code (DTC) information ECM-135F



Condition

The engine control module (ECM) continuously monitors the mass air flow sensor signal for plausibility and follows the characteristics of the mass air flow sensor.

If the engine control module (ECM) detects that the signal from the mass air flow (MAF) sensor is incorrect the diagnostic trouble code (DTC) is generated.

Note that malfunction of the swirl valve can cause the diagnostic trouble code to be generated.

The diagnostic trouble code (DTC) can be diagnosed when the engine is running.



Substitute value

Torque limitation

An estimated mass air value is used.

Possible source

Note! If any of the following diagnostic trouble codes on the swirl damper have been stored, fault-trace these before diagnostic trouble code ECM-135F.

ECM-18B0.

ECM-1890.

ECM-1870.

ECM-18A0.

ECM-1870.

ECM-1880.

If diagnostic trouble code ECM-135F has been stored together with ECM-1507, the fault is probably due to a leak on the hose or connection between the mass air flow sensor (MAF) and turbocharger.

Contact resistance or oxidation in the terminals.

Clogged air filter.

Faulty air temperature sensor inlet.

The EGR-valve has jammed in open position.

Incorrect camshaft position.

Damaged mass air flow (MAF) sensor.



Fault symptom

Driving/Poor performance/lacks power Poor performance.

Message in information display
Zitat:

284: ECM-28E0 Heated oxygen sensor (HO2S). Signal too high, D5244T4

Print



Diagnostic trouble code (DTC) information ECM-28E0



Condition

The engine control module (ECM) receives information from the heated oxygen sensor (HO2S) about the fuel / air mixture.

If the engine control module (ECM) detects that the heated oxygen sensor's signal for oxygen content is incorrect, the diagnostic trouble code (DTC) is generated.

The diagnostic trouble code (DTC) can be diagnosed when driving under specific driving conditions. Lightly loaded engine.



Substitute value

None.

Possible source

Signal too high

Short-circuit to supply voltage in the signal cable.

Damaged heated oxygen sensor (HO2S).

Internal fault in the control module.

Signal too low

Short-circuit to ground in the signal cable.

Damaged heated oxygen sensor (HO2S).

Internal fault in the control module.



Fault symptom

Message in information display



Signal too high

Checking the component and wiring

Ignition off.



Disconnect the connector to the Engine Control Module (ECM).



Check the terminals. Check for contact resistance. Check for loose connections. Check for oxidation.



Check the signal cable. Check for a short-circuit to supply voltage.



Take readings between:

The Engine Control Module (ECM) #A80 (#B20) and heated oxygen sensor #1.



Engine control module (ECM) #A6 (#A6) and heated oxygen sensor #5.



Engine control module (ECM) #A31 (#A31) and heated oxygen sensor #6.



Remedy as necessary.



Other information

Connecting the breakout box, engine control module (ECM)



Signal specification, engine control module (ECM)



Heated oxygen sensor (HO2S), replacing



Engine control module (ECM), replacing



Checking wiring and terminals:Contents
Zitat:

284: ECM-28E0 Heated oxygen sensor (HO2S). Signal too low, D5244T4

Print



Diagnostic trouble code (DTC) information ECM-28E0



Condition

The engine control module (ECM) receives information from the heated oxygen sensor (HO2S) about the fuel / air mixture.

If the engine control module (ECM) detects that the heated oxygen sensor's signal for oxygen content is incorrect, the diagnostic trouble code (DTC) is generated.

The diagnostic trouble code (DTC) can be diagnosed when driving under specific driving conditions. Lightly loaded engine.



Substitute value

None.

Possible source

Signal too high

Short-circuit to supply voltage in the signal cable.

Damaged heated oxygen sensor (HO2S).

Internal fault in the control module.

Signal too low

Short-circuit to ground in the signal cable.

Damaged heated oxygen sensor (HO2S).

Internal fault in the control module.



Fault symptom

Message in information display





Signal too low

Checking the component and wiring

Ignition off.



Disconnect the connector to the Engine Control Module (ECM).



Check the terminals. Check for contact resistance. Check for loose connections. Check for oxidation.



Check the signal cable. Check for a short-circuit to ground .



Take readings between:



Engine control module (ECM) #A6 (#A6) and heated oxygen sensor #5.



The Engine Control Module (ECM) #A80 (#B20) and heated oxygen sensor #1.



Engine control module (ECM) #A31 (#A31) and heated oxygen sensor #6.



Remedy as necessary.



Other information

Connecting the breakout box, engine control module (ECM)



Signal specification, engine control module (ECM)



Heated oxygen sensor (HO2S), replacing



Engine control module (ECM), replacing



Checking wiring and terminals:Contents