FixVault

Service Data

WARNING: This page is about a different car, the 2005 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.
Service Data - Ignition [1GR-FE]

Spark plug Recommended spark plug NGK made LFR6C-11
  DENSO made K20HR-U11
Electrode gap Standard 1.0 to 1.1 mm (0.039 to 0.043 in.)
  Maximum 1.46 mm (0.057 in.)
Crankshaft position sensor Resistance Cold 1,630 to 2,740 Ω
  Hot 2,065 to 3,225 Ω