1988 Toyota Land CruiserFACTORY OEM SERVICE PROCEDURE

Throttle Position Sensor (TPS)

Turn ignition off and disconnect electrical connector at TPS. Note terminal identification. Insert specified thickness feeler gauge between throttle stop screw and throttle ever. See TPS RESISTANCE SPECIFICATIONSΒ  table. Using an ohmmeter, check for resistance or continuity. Replace or adjust TPS if not within specification. See TPS RESISTANCE SPECIFICATIONSΒ  table.

Fig 1: Checking Throttle Position Sensor
G95395Courtesy of Β© TOYOTA, LICENSE AGREEMENT TMS1002
TPS RESISTANCE SPECIFICATIONS

Clearance In. (mm) Terminal Ohmmeter Reading
0 (0) VTA & E2 300-6300
.030 (.76) IDL & E2 2300 or Less
.043 (1.09) IDL & E2 Infinity
Fully Open VTA & E2 3500-10,300
Fully Open VC & E2 4250-8250
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.