Ignition System (1ZZ-FE): Inspection

INSPECT 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.
  Air pressure: Below 588 kPa (6.0 kgf/cm ² , 85 psi) Duration: 20 seconds or less
  
  Fig 1: Cleaning Spark Plugs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the spark plug for any damage on its thread and insulator.
  HINT:
  
  If damaged, replace the spark plug.
  1. Recommended spark plug:
  2. SK16R11 (DENSO made)
  3. IFR5A11 (NGK made)
  Fig 2: Checking Spark Plug For Damage On Thread And Insulator
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the spark plug electrode gap.
  Electrode gap: 1.0 to 1.3 mm (0.039 to 0.051 in.)
  
  Fig 3: Checking Spark Plug Electrode Gap
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT CAMSHAFT POSITION SENSOR
1. Using an ohmmeter, measure the resistance between the terminals.
  RESISTANCE:
  
  835 to 1400 Ω at cold
  
  1060 to 1645 Ω at hot
  
  NOTE: Cold and Hot mean 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).
  
  HINT:
  
  If the resistance is not as specified, replace the camshaft position sensor.
INSPECT CRANKSHAFT POSITION SENSOR
1. Using an ohmmeter, measure the resistance between the terminals.
  RESISTANCE:
  
  1630 to 2740 Ω at cold
  
  2065 to 3225 Ω at hot
  
  NOTE: Cold and Hot mean 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).
  
  HINT:
  
  If the resistance is not as specified, replace the crankshaft position sensor.

INSPECT IGNITION RELAY NO.1

Check the resistance.

Using an ohmmeter, measure the resistance between the terminals.

IGNITION RELAY NO 1 TERMINALS RESISTANCE

Tester Connection	Specified Condition
3-5	10kΩ or higher
3-5	Below 1Ω (Apply battery voltage to terminals 1 and 2)

Fig 4: Measuring Resistance Between Ignition Relay No. 1 Terminals

If the result is not as specified, replace the ignition relay.