Ignition System: 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.
  Air pressure: Below 588 kPa (6.0 kg/cm ² , 85 psi) Duration: 20 seconds or less
  
  Fig 1: Identifying Clean Spark Plugs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the spark plug for thread damage and insulator damage.
  HINT:
  
  If abnormal, replace the spark plug.
  
  Recommended spark plug:
  
  SK16R11 (DENSO made)
  
  IFR5A11 (NGK made)
  
  Fig 2: Checking Spark Plug For Thread Damage And Insulator Damage
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check the spark plug electrode gap.
  Electrode gap: 1.1 mm (0.043 in.)
Fig 3: Checking Spark Plug Electrode Gap
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CRANK POSITION SENSOR NO. 1
1. Using an ohmmeter, measure the resistance between terminals.
  RESISTANCE:
  
  At cold 835 -1,400 Ω
  
  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).

HINT:

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.
  RESISTANCE:
  
  At cold 1,630 -2,740 Ω
  
  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).

HINT:

If the resistance is not as specified, replace the crank position sensor.
IGNITION RELAY
1. Continuity inspection.
  1. Using an ohmmeter, check that continuity exists between each terminal.
    Specified condition:
    
    Between terminal 1 and 2 Continuity
    
    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.
Fig 4: Checking Continuity Exists Between Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002