Keeping the 1G-FE "hot" and running smoothly requires attention to these known vulnerabilities:

: 135 PS, standard multi-point fuel injection. 2nd Gen (1996) : Increased output to 140 PS.

While the 1GR-FE is different (V6), some general assembly procedures are similar, found in this FJ Cruiser Manual . Key Torque Specifications

Since the "timing belt" is the most common reason people need this manual, here is a quick workflow using your PDF: