Throttle Position Sensor (TPS)

Turn ignition off. Disconnect TPS connector. Using a DVOM, measure resistance between specified TPS terminals in appropriate TPS SPECIFICATIONS table below. See Fig 1.

ES250 TPS SPECIFICATIONS

TPS Terminals

Conditions

Ohms

VTA & E2

⁽¹⁾ Zero

300-6300

IDL & E2

⁽¹⁾ .012" (.30 mm)

2300 or Less

IDL & E2

⁽¹⁾ .028" (.71 mm)

.Infinity

VTA & E2

Throttle Valve Fully Open

3500-10,300

VC & E2

N/A

4250-8250

⁽¹⁾	Clearance between throttle lever and stop screw.

LS400 TPS SPECIFICATIONS

TPS Terminals

Conditions

Ohms

VTA & E2

⁽¹⁾ Zero

200-1200

IDL & E2

⁽¹⁾ .016" (.41 mm)

2300 or Less

IDL & E2

⁽¹⁾ .034" (.86 mm)

Infinity

VTA & E2

Throttle Valve Fully Open

3300-10,000

VC & E2

N/A

4000-9000

⁽¹⁾	Clearance between throttle lever and stop screw.

Fig 1: TPS Connector Terminal ID (ES250 Shown; LS400 Similar)