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 plug.
  Air pressure: Below 588 kPa (6.0 kg/cm ² , 85 psi)
  
  Duration: 20 seconds or less
  
  Fig 1: Cleaning Spark Plug
  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.
  
  Recommended spark plug:
  
  SK16R11 (DENSO made)
  
  IFR5A11 (NGK made)
  
  Fig 2: Checking Spark Plug For Any Damage On Its 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:
  
  to 1400 Ω at cold
  
  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.
1. Using an ohmmeter, measure the resistance between the terminals.
Standard:

TESTER CONNECTION - SPECIFIED CONDITION

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

Fig 4: Measuring Resistance Between Terminals Using Ohmmeter

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