Ignition System (1ZZ-FE): Inspection

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
  Courtesy 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
  Courtesy 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
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Electrode gap: 1.1 mm (0.043in.)
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.
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.
IGNITION RELAY

Fig 4: Identifying Ignition Relay Terminals
Courtesy 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.