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Ignition System (1ZZ-FE): Inspection

  1. SPARK PLUG 
    NOTE:
    • Never use a wire brush for cleaning.
    • Never attempt to adjust the electrode gap on used spark plug.
    • Spark plug should be replaced every 192,000 km (120,000 miles).
    1. Clean the spark plugs.
      Fig 1: Cleaning Spark Plugs
      G00922936Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Air pressure: Below 588 kPa (6.0kg/cm 2  ,85psi) 
      2. Duration: 20 seconds or less 
    2. Check the spark plug for thread damage and insulator damage.
      Fig 2: Checking Spark Plug For Thread Damage & Insulator Damage
      G00922937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: If abnormal, replace the spark plug.
      1. Recommended spark plug: 
        1. SK 16R11 (DENSO made) 
        2. IFR5A11 (NGK made) 
    3. Check the spark plug electrode gap.
      Fig 3: Checking Spark Plug Electrode Gap
      G00922938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Electrode gap: 1.1 mm (0.043in.) 
  2. CRANK POSITION SENSOR NO. 1 
    1. Using an ohmmeter, measure the resistance between terminals.
      1. RESISTANCE: 
        1. At cold: 835 - 1,400 Ω 
        2. At hot: 1,060 - 1,645 Ω 
    NOTE: "Cold" and "Hot" on the table express the temperature of the coils themselves. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).
    NOTE: If the resistance is not as specified, replace the crank position sensor No. 1.
  3. CRANK POSITION SENSOR 
    1. Using an ohmmeter, measure the resistance between terminals.
      1. RESISTANCE: 
        1. At cold: 1,630 - 2,740 Ω 
        2. At hot: 2,065 - 3,225 Ω 
    NOTE: "Cold" and "Hot" on the table express the temperature of the coils themselves. "Cold" is from -10°C (14°F) to 50°C (122°F) and "Hot" is from 50°C (122°F) to 100°C (212°F).
    NOTE: If the resistance is not as specified, replace the crank position sensor.
  4. IGNITION RELAY 
    Fig 4: Identifying Ignition Relay Terminals
    G00922939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Continuity inspection.
      1. Using an ohmmeter, check that continuity exists between each terminal.
        1. Specified condition: 
          1. Between terminal 1 and 2: Continuity 
          2. Between terminal 3 and 5: No continuity 
      2. Using an ohmmeter, check that continuity exists between terminals 3 and 5 when the battery voltage is applied across terminals 1 and 2.
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