ecm grounds 2004 nissan murano
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Filed Under (Nissan) by admin on 21-09-2010
ENGINE WILL NOT START NVIS/NATS SYSTEM DESCRIPTION/KEY REGISTRATION This version of NTB03-031 amends the Applied Vehicles. Please discard all paper copies of the earlier versions. APPLIED VEHICLES: 2005 and later Altima (L31), Pathfinder (R51), Frontier (D40), Xterra (N50), 350Z (Z33) 2004 and later Maxima (A34), Quest (V42), Armada (TA60), Titan (A60), Murano (Z50) 2004 350Z (Z33) built after the following:NOTE: ^ For 2003 Murano, and 2003-2004 350Z built before the above Date and VIN’s, see NTB02-071 ^ This bulletin does NOT cover 2002-2004 Altima. SERVICE INFORMATION ^ This bulletin covers the latest version of the Nissan Vehicle Immobilizer System/Nissan Anti-Theft System (NVIS/NATS). This system, referred to as “NATS”, is standard equipment on the Applied Vehicles listed above. ^ This version of NATS uses advanced anti-theft functions which are “password protected”. This helps prevent “unauthorized access” into the NATS registration procedure. ^ To obtain the password from ASIST, first use CONSULT-II to get the “BCM-specific” 5-digit number (PIN) code from the vehicle. ^ Unlike earlier NATS systems, this NATS system DOES NOT need to be Re-Initialized if the Electronic Control Unit (ECM) is replaced. NOTE: The ECM and Body Control Module (BCM) do work together, but the BCM in this system controls the information necessary to “tell” the ECM to start the vehicle. IMPORTANT: The NATS Procedure in this bulletin is for the Applied Vehicles only. Do not use this procedure on other NATS-equipped vehicles.
Filed Under (Nissan) by admin on 21-12-2010
Vehicle Application: Customer Concern: Tests/Procedures: Potential Causes: Tech Tips: 2004 Nissan Murano 3.5L, USA/Canada Malfunction Indicator Light (MIL) is ON. Bank 1 catalytic converter code P0420. 1. Check scan data for fuel trims to see if the system is in proper fuel control – look for 0% plus or minus 10% in generic or 90 – 110 % alpha in manufacture specific. 2. Verify there are no exhaust leaks. 3. Drive the vehicle and check the bank 1 rear O2 sensor activity on the scan tool or with a voltmeter to see if the bank 1 rear O2 sensor is cross counting like a typical front O2 sensor would. Catalytic Converter If in manufacture specific with the scan tool, Nissan displays fuel trims in alpha. 100% alpha is the same as 0% fuel trim. This vehicle has front air fuel ratio sensors – not O2 sensors. Bank 1 is the firewall bank. Bank 2 is the radiator bank. Before the catalytic converter lights off, the rear O2 sensor voltage is usually down around 0.2 – 0.4 volts or so but when the catalytic converter lights off, it uses up a lot of the oxygen so the rear O2 sensor voltage will typically reads around 0.6 – 0.7 volts and have some movement but not a lot of movement and should not cross count above and below 0.5 volts. The catalytic converter is covered under the 8 year 80,000 mile federal emissions warranty. 2004 Nissan Quest 3.5L, USA/Canada
Filed Under (Audi) by admin on 15-09-2009
Check the following wire connection for open circuit according to wiring diagram:Relay carrier in E-box, plenum chamber, position 3Terminal Harness connector atignition coils Terminal 8 1 Specified value: Wire resistance max 1.5 – If necessary, repair wire connection. Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 – 1.8 Liter 4-Cyl. 5V Turbo Generic Scan Tool, Engi…Page 5 24-158 If no malfunctions are found in wires: – Check voltage supply of Motronic Engine Control Module (ECM) voltage supply relay – J271 – Page 24-158 . – Check activation of Motronic Engine Control
Module (ECM) voltage supply relay – J271 – Page 24-159 . Checking voltage supply If specified value is not obtained:
- Connect multimeter for voltage measurement as follows. Relay carrier in E-box, plenum chamber, position 3
Filed Under (Ford) by admin on 11-05-2010
Some 1999-2004 Navigator, 2002-2003 Blackwood, 2003-2005 Aviator, 2003-2004 Marauder and 2003-2004 Mustang vehicles built before 12/19/2004 equipped with 4.6L 4V/5.4 4V engine may exhibit a runs rough, lacks power, and engine misfire, prompted by a MIL light and DTC codes P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0316. ACTION Diagnose engine for engine misfire concern. If diagnostics determine an engine misfire which is characterized by leakage through exhaust valve(s), only replace the affected cylinder head(s). SERVICE PROCEDURE
Filed Under (Nissan) by admin on 27-11-2010
some 2000-2002 model year Nissan Sentra vehicles equipped with the 1.8 liter engine and some 2002-2003 model year Nissan Sentra vehicles equipped with the 2.5 liter engine may have a defect which relates to motor vehicle safety. The engine might stop running while being driven due to contamination of the Engine Control Module (ECM) by the inner lining material. This may also result in the “Service Engine Soon” light coming on or poor driveability. If the engine stops running while driving, this could result in a crash without warning. SERVICE PROCEDURE Remove/discard the Foam from the inside of the ECM Case Holder as follows. The ECM Case Holder will have to be re-positioned (moved) to do this procedure. NOTE: • Use suitable covers to protect vehicle paint, trim, etc. when doing this procedure. • Step one (below) only applies to vehicles equipped with a Strut Tower Cross Bar. • Doing step one will allow clearance for removing the ECM Case Holder from the engine room wall. 1. If equipped, re-position the Strut Tower Cross Bar and remove the Strut Tower Cross Bar Mounting Bracket as follows: a. Remove the nut/bolt that holds the Strut Tower Cross Bar to the Strut Tower Cross Bar Mounting Bracket (see Figure 1). b. Reposition the Strut Tower Cross Bar UP and OUT of the way. c. Take off three Nuts and remove the Strut Tower Cross Bar Mounting Bracket (see Figure 2). 2. Remove two Screws that hold the Main Wiring Harness Support Bracket to the Strut Tower (see Figure 3). 3. Disconnect the Rubber Vent Tube from the ECM Case Holder (see Figure 4). 4. If equipped, remove two Screws and re-position the Manifold Absolute Pressure (MAP) Sensor (see Figure 5). 5. Re-position the Throttle Cable Guide by removing it from the Metal Tab (see Figure 5).