1993 Lexus SC 400FACTORY OEM SERVICE PROCEDURE

Throttle Position Sensor

THROTTLE POSITION SENSOR RESISTANCE - ES300

Application & Throttle Plate Position (1)(2) TP Sensor Terminals Ohm Readings
Throttle Fully Closed VTA & E2 280-6400
.014" (.35 mm) IDL & E2 500 Or Less
.028" (.70 mm) IDL & E2 Infinite (Open)
Throttle Fully Open VTA & E2 2000-11,600
All Positions VC & E2 2700-7700
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
(2) When checking main TP sensor, disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat.
THROTTLE POSITION SENSOR RESISTANCE - GS300

Application & Throttle Plate Position (1)(2) TP Sensor Terminals Ohm Readings
Main TP Sensor
Throttle Fully Closed VTA1 & E2 340-6300
.016" (.40 mm) IDL1 & E2 500 Or Less
.024" (.60 mm) IDL1 & E2 Infinite (Open)
Throttle Fully Open VTA1 & E2 2400-11,200
All Positions VC & E2 3100-7200
Sub-TP Sensor (W/ TRAC)
Throttle Fully Closed VTA2 & E2 340-6300
.016" (.40 mm) IDL2 & E2 500 Or Less
.024" (.60 mm) IDL2 & E2 Infinite (Open)
Throttle Fully Open VTA2 & E2 2400-11,200
All Positions VC & E2 3100-7200
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
(2) When checking main TP sensor, disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat.
THROTTLE POSITION SENSOR RESISTANCE - LS400

Application & Throttle Plate Position (1) TP Sensor Terminals Ohm Readings
Main TP Sensor
Throttle Fully Closed VTA1 & E2 340-6300
.016" (.40 mm) IDL1 & E2 500 Or Less
.026" (.65 mm) IDL1 & E2 Infinite (Open)
Throttle Fully Open VTA1 & E2 2400-11,200
All Positions VC & E2 3100-7200
Sub-TP Sensor (W/ TRAC)
Throttle Fully Closed VTA2 & E2 340-6300
.016" (.40 mm) IDL2 & E2 500 Or Less
.026" (.65 mm) IDL2 & E2 Infinite (Open)
Throttle Fully Open VTA2 & E2 2400-11,200
All Positions VC & E2 3100-7200
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
THROTTLE POSITION SENSOR RESISTANCE - SC300

Application & Throttle Plate Position (1)(2) TP Sensor Terminals Ohm Readings
Main TP Sensor
Throttle Fully Closed VTA1 & E2 .20-.80
.018" (.45 mm) IDL1 & E2 2300 Or Less
.022" (.55 mm) IDL1 & E2 Infinite (Open)
Throttle Fully Open VTA1 & E2 3300-10,000
All Positions VC & E2 4000-9000
Sub-TP Sensor (W/ TRAC)
Throttle Fully Closed VTA2 & E2 .20-.80
.014" (.35 mm) IDL2 & E2 2300 Or Less
.020" (.50 mm) IDL2 & E2 Infinite (Open)
Throttle Fully Open VTA2 & E2 3300-10,000
All Positions VC & E2 4000-9000
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
(2) When checking main TP sensor, disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat.
THROTTLE POSITION SENSOR RESISTANCE - SC400

Application & Throttle Plate Position (1) TP Sensor Terminals Ohm Readings
Main TP Sensor
Throttle Fully Closed VTA1 & E2 .20-.80
.016" (.40 mm) IDL1 & E2 2300 Or Less
.026" (.65 mm) IDL1 & E2 Infinite (Open)
Throttle Fully Open VTA1 & E2 3300-10,000
All Positions VC & E2 4000-9000
Sub-TP Sensor (W/ TRAC)
Throttle Fully Closed VTA2 & E2 .20-.80
.012" (.30 mm) IDL2 & E2 2300 Or Less
.020" (.50 mm) IDL2 & E2 Infinite (Open)
Throttle Fully Open VTA2 & E2 3300-10,000
All Positions VC & E2 4000-9000
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
THROTTLE POSITION SENSOR ADJUSTMENT - ES300

Application & Throttle Plate Position (1)(2) Continuity Between Terminals IDL & E2
.014" (.35 mm) Yes
.028" (.70 mm) No
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
(2) If adjusting main TP sensor, disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat.
THROTTLE POSITION SENSOR ADJUSTMENT - GS300

Application & Throttle Plate Position (1)(2) Continuity Between Terminals IDL & E2
Main TP Sensor
.016" (.40 mm) Yes
.024" (.60 mm) No
Sub-TP Sensor (With TRAC)
.012" (.30 mm) Yes
.020" (.50 mm) No
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
(2) If adjusting main TP sensor, disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat.
THROTTLE POSITION SENSOR ADJUSTMENT - LS400

Application & Throttle Plate Position (1) Continuity Between Terminals IDL & E2
Main TP Sensor
.016" (.40 mm) Yes
.026" (.65 mm) No
Sub-TP Sensor (With TRAC)
.012" (.30 mm) Yes
.020" (.50 mm) No
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
THROTTLE POSITION SENSOR ADJUSTMENT - SC300

Application & Throttle Plate Position (1)(2) Continuity Between Terminals IDL & E2
Main TP Sensor
.018" (.45 mm) Yes
.022" (.55 mm) No
Sub-TP Sensor (With TRAC)
.014" (.35 mm) Yes
.020" (.50 mm) No
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
(2) If adjusting main TP sensor, disconnect vacuum hose from throttle opener. Apply vacuum to throttle opener to allow throttle to fully seat.
THROTTLE POSITION SENSOR ADJUSTMENT - SC400

Application & Throttle Plate Position (1) Continuity Between Terminals IDL & E2
Main TP Sensor
.016" (.40 mm) Yes
.026" (.65 mm) No
Sub-TP Sensor (With TRAC)
.012" (.30 mm) Yes
.020" (.50 mm) No
(1) Insert appropriate size feeler gauge between throttle lever and throttle stop screw.
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