You can see an example of a wire piercing probe here: Wire-Piercing Probe. Coil boots on your Nissan Altima, sometimes called ignition boots or spark plug boots, connect the coil pack to the spark plug and insulate the voltage from the coil to prevent it from arcing to the engine.
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Use an appropriate tool to back probe or pierce the wire to get to the voltage within the wire. RockAuto ships auto parts and body parts from over 300 manufacturers to customers doors worldwide, all at warehouse prices. Shop for the best Ignition Coil for your 2005 Nissan Altima, and you can place your order online and pick up for free at your local OReilly Auto Parts. NOTE: It's important that you do not probe the front of the connector (or you run the risk of damaging the female terminal). Power (in the form of 10 to 12 Volts DC) is fed to the ignition coil by the wire labeled with the number 1 in the photo above. These all pulse the grounds and are triggered by the ignition pulse. pin 102 (1 inj) red and black, pin 107 (2 inj) yellow and black, pin 104 (3 inj) green and black and pin 09 (4 inj)blue and black. Coming off the ECM, are four wires which are numbered as followed. Testing the power (12 Volts) circuit of the ignition coil on your Nissan Altima or Sentra can be accomplished using a multimeter or a 12 Volt test light. ECM makes and breaks the ground to pulse the injectors. TEST 2: Testing The Power Circuit (12 Volts) For this test go to: TEST 2: Testing The Power Circuit (12 Volts). When a part of this system, such as the canister purge valve, fails, it can lead to rough idle, difficult starting, or you may notice the Check Engine light on your Altima's dash. In about 90% of the time, this test result lets you know that the ignition coil is fried and that replacing it will solve the misfire condition.īut, just to make sure that no other issues exists to cause this no-spark result on this ignition coil, the next step is to make sure that this particular ignition coil is getting power. The vapor canister and purge valve trap fuel vapors, and then release the vapors to the engine at the appropriate time to burn them off in the cylinder. Since your Altima (or Sentra) is suffering a cylinder misfire, take a look at the suggestions found here: TEST 6: Carbon Tracks And Other Stuff.ĬASE 2: The spark tester DID NOT spark. This test result tells you that the ignition coil is fine. Between terminal 2 and 8 got 41.6 K ohms OK from page EC-1904 checked distributor cap. from page EC-1904 checked power transistor. Repeat the test for all of the remaining Coil-On-Plug ignition coils on your Nissan Altima or Sentra.ĬASE 1: The spark tester sparked. Discovered the ignition coils and cam sensor are.
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