Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » Technical Service Bulletins » All Technical Service Bulletins » Emissions - System Readiness Test (SRT) Drive Patterns » Service Procedure » Step 7: Confirm All SRTs "Complete"  
 
 
  Step 7: Confirm All SRTs "Complete"  
 

Step 7: Confirm All SRTs "COMPLETE"

If all SRT items indicate "COMPLETE," the inspection is complete.

^ If Catalyst and/or O2 Sensor Monitors show "INCOMPLETE" perform step A or B below.

A. Check Self Learning Value (Long Term Fuel Trim (LTFT)) and A/F ALPHA (Short Term Fuel Trim (STFT)). If either value is +10% or more above target of 100%, clear Self Learning Value.

^ Perform DTC diagnosis for P0171 or P0174 and check for the following possible causes:

> Intake air leaks

> Front heated oxygen sensors

> Injectors

> Exhaust gas leaks

> Incorrect fuel pressure

> Lack of fuel

> Mass air flow sensor

B. Check Self Learning Value (Long Term Fuel Trim (LTFT)) and A/F ALPHA (Short Term Fuel Trim (STFT)). If either value is -10% or more below target of 100%, clear Self Learning Value.

^ Perform DTC diagnosis for P0172 or P0175 and check for the following possible causes:

> Intake air leaks

> Front heated oxygen sensors

> Injectors

> Exhaust gas leaks

> Incorrect fuel pressure

> Lack of fuel

> Mass air flow sensor

^ After repairs have been made, run the prescribed drive pattern and check that A/F ALPHA is within +/-10% of the target of 100% during the steady state portions of the drive cycle. If it is not, then continue repairs. If it is, return to STEP 5.