The ECM, or personal computer, on the 1995 Nissan Altima receives instruction from sensors. In turn, the pc provides instruction to other sensors and adjusts the ignition timing and injector timing for air-to-fuel ratio. Provided one of the sensors malfunctions, the machine Testament letter a law. This Testament turn the "test engine" burnished on to warn the Chauffeur something is malfunctioning. Whether there are too many codes, the computer is suspect. If the code scanner gives you a code or several codes that do not exist, the computer is suspect.3.
Plug the code scanner into the information link Harbour under the Chauffeur's side sprint. Turn the primary to the "On" position. Press the "Study" Press-stud on the statute scanner. Copy down the codes.
2. Compare the codes to the statute phase. You can test to contemplate provided the ECM works properly in a sporadic clean steps.
Instructions
1.Remove the negative battery cable, using the appropriate wrench. Set it aside, ensuring that it does not touch metal. Ground yourself by touching metal. Even the smallest static shock from your fingers could render a good computer bad.
4. Remove the wiring harness connectors on the back of the computer, using the appropriate socket. The bolt is in the center of the connectors. Most Altimas have three connectors on the back of the computer. Pull the connectors straight off the back of the computer, taking care not to bend the pins.
5. Unbolt the computer from its bracket. Remove the back cover on the underside of the computer, using the appropriate socket. Stare at the circuit board inside. If the board looks burned near any of the solder joints, that circuit is bad, and the computer must be replaced.
