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    1995 Nissan/Datsun Altima 2.4L SFI DOHC 4cyl

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    Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

    Diagnosis and Testing

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    PRECAUTIONS





    Do not allow the ignition switch to be ON for more than ten minutes if the engine will not start.
     
    When a tachometer is connected to the system, always connect the tachometer positive lead to the ignition coil negative terminal. Some tachometers are not compatible with this system; it is recommended that you consult with the manufacturer.
     
    NEVER allow the ignition coil terminals to touch ground as it could result in damage to the igniter and/or the ignition coil itself.
     
    Do not disconnect the battery when the engine is running.
     
    Make sure that the igniter is always properly grounded to the body
     

    SPARK TEST



    The spark test is used to see if the ignition system is delivering electricity through the coil wire to the distributor. Use this test a s a preliminary test if the engine cranks but won't start. Its a simple test, but can give a nasty shock if not performed correctly.

    1. Disconnect the end of the coil wire at the distributor.
    2.  
    3. Use a well-insulated tool (such as ignition wire pliers) to hold the exposed end of the wire about 1 / 2 inch (13mm) from the metal of the engine block.
    4.  


    CAUTION
    Do not attempt to hold the wire with your bare hand. Use as much insulation as possible between the wire and the tool holding it. Do not stand on wet concrete while testing. Do not lean on the bodywork of the car while testing. The electrical charge will pass through the easiest path to ground, make certain its not you. Make sure the metal ground point nearest the cable end is safe; don't choose components that might contain fluids or electronic components.

    1. Have an assistant crank the engine by turning the ignition switch to the START position, but only for 1 or 2 seconds. Keep clear of moving parts under the hood, and keep clothing and hair well out of the way. If the cable end is the correct distance from solid metal, a distinct, blue-white spark should jump to the metal as the engine cranks.
    2.  
    3. The engine may be cranked in the 1-2 seconds bursts. Longer cranking will cause the fuel injectors to deliver fuel into the cylinders, flooding the engine or at least fouling the spark plugs.
    4.  
    5. If no spark is present, turn the ignition switch OFF and proceed to check the resistance of the of the coil wire, the voltage supply to the coil (12 volts with the ignition ON ), the coil resistance, the resistance of the pickup coil and the air gap within the distributor.
    6.  

    IGNITION COIL

    1. With th1 ignition switch OFF , carefully remove the high-tension cable (coil-to-distributor wire) from the coil.
    2.  
    3. Carefully unplug the smaller electrical connector from the coil. The 1989-90 Land Cruisers and all 4 cylinder trucks and 4Runners do not have this small connector; battery wires run to external terminals on the coil. These terminals do not need to be undone.
    4.  
    5. Use an ohmmeter to test primary side resistance. Connect the probes to the 2 terminal pins of the small electrical connector or the two external terminals on each side of the coil.
    6.  
    7. Perform the check before running the engine. All the following values are on cold engines.
    8.  

    Resistance should be:


    1989-91-22R engine: 0.4-0.5 ohms
     
    1989-92-22R-E engine: 0.52-0.64 ohms
     
    1993-95-22R-E engine: 0.36-0.55 ohms
     
    1994-96-2RZ-FE and 3RZ-FE engines: 0.36-0.55 ohms
     
    1989-91-3VZ-E engine: 0.4-0.5 ohms
     
    1992-95-3VZ-E engine: 0.3-0.6 ohms
     
    1989-90-3F-E engine: 0.52-0.64 ohms
     
    1991-3F-E engine: 0.41-0.50 ohms
     
    1992-96-1FZ-FE engine: 0.3-0.6 ohms
     

    1. Check the secondary circuit resistance with the ohmmeter. Make certain the meter is set to a much higher scale than the previous test. Connect one probe of the meter to the positive coil terminal and the other to the high-tension terminal.
    2.  
    3. Correct resistances for a cold coil are:
    4.  



    1989-91-22R engines: 8.5-11.5k ohms
     
    1989-92-22R-E engines: 11.4-15.6k ohms
     
    1993-95-22R-E engine: 9.0-15.4k ohms
     
    1989-91-3VZ-E engine: 10.2-13.8k ohms
     
    1992-95-3VZ-E engine: 9-15k ohms
     
    1994-96-2RZ-FE and 3RZ-FE engines: 9.0-15.4k ohms
     
    1989-90-3F-E engine: 11.5-15.5k ohms
     
    1991-3F-E engine: 10.2-13.8k ohms
     
    1992-96-1FZ-FE engine: 9-15k ohms
     

    1. If either resistance is not within specifications, the coil must be replaced.
    2.  
    3. For the 1989 22R engine, measure resistance from the negative coil terminal to the body of the igniter. Resistance should be infinite (no continuity). If any continuity is found, replace the coil.
    4.  

    PICK-UP COIL(S)



    1989-91 Models
    1. Detach the distributor connector.
    2.  
    3. Remove the distributor cap without removing the sparkplug wires.
    4.  
    5. Remove the rotor.
    6.  
    7. With the ignition OFF , carefully detach the connector in the harness coming from the side of the distributor.
    8.  
    9. For 2-pin connectors, measure the resistance between the two terminals. Resistance for all 1989-90 vehicles is 140-180 ohms. For 1991 vehicles, resistance should be 205-255 ohms.
    10.  
    11. The 3-pin connectors are used on the Land Cruisers. Hold the connector so that the empty section of the 4-pin housing is in the lower left. The terminal in the lower right is called G-. Test each of the other terminals to G-, looking for resistance of 140-180 ohms on 1989-91 vehicles.
    12.  
    13. Four-pin connectors require you to hold the connector so that the square part of the housing is at the bottom. Viewing the connector in this position, the terminal on the lower right is called G-. Use the ohmmeter to check each other terminal to G-. Correct resistance for 1989-90 vehicles is 140-180 ohms; for 1991, it's 205-255 ohms.
    14.  
    15. If any resistance is out of specification, the distributor housing assembly must be replaced.
    16.  

    1992-95 Models22R-E, 2RZ-FE and 3RZ-FE

    1. Detach the distributor connector.
    2.  
    3. Remove the distributor cap without removing the sparkplug wires.
    4.  
    5. Remove the rotor.
    6.  
    7. With the ignition OFF , carefully detach the connector in the harness coming from the side of the distributor.
    8.  
    9. Using an ohmmeter, check the resistance of the signal generator (pick-up coil). With the engine cold, the reading should be 185-275 ohms; hot reading is 240-325 ohms.
    10.  
    11. If the resistance is not within specifications, replace the distributor housing assembly.
    12.  

    3VZ-E and 1FZ-FE

    See Figures 1, 2 and 3

    1. Detach the distributor connector.
    2.  
    3. Remove the distributor cap without removing the sparkplug wires.
    4.  



    Click image to see an enlarged view

    Fig. Fig. 1: Attach the ohmmeter to the terminals as shown



    Click image to see an enlarged view

    Fig. Fig. 2: Pick-up coil resistance on the 3VZ-FE engine

    1. Remove the rotor.
    2.  



    Click image to see an enlarged view

    Fig. Fig. 3: Pick-up coil resistance on the 1FZ-FE engine

    1. Using an ohmmeter, check the resistance of the pick-up coil. Refer to the chart for specifications.
    2.  
    3. If the resistance is not within specifications, replace the distributor housing assembly.
    4.  

     
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