Your Vehicle: 2009 Nissan-Datsun Altima V6-3.5L (VQ35DE)
 
Vehicle » Service Precautions » Technician Safety Information » Multiport Fuel Injection System Or Engine Control System  
 
 
  Multiport Fuel Injection System Or Engine Control System  
 

PRECAUTIONS

Multiport Fuel Injection System or Engine Control System

  

  • Before connecting or disconnecting any harness connector for the multiport fuel injection system or ECM: Turn ignition switch to "OFF" position.

Disconnect negative battery terminal.
Otherwise, there may be damage to ECM.

  • Before disconnecting pressurized fuel line from fuel pump to injectors, be sure to release fuel pressure.
  • Be careful not to jar components such as ECM and mass air flow sensor.