Throttle Position Sensor/Switch: Testing and Inspection

MEASURE VOLTAGE SIGNAL FROM TCM

Measure TCM Input Signal Voltage:

1. Ignition switch ON (engine not running).
2. Measure signal voltage input from throttle position sensor with accelerator pedal fully depressed.

Connector & Terminal Voltage
(B53) 20 - (B52) 14 0.3 - 0.7V (throttle fully closed)
3.9 - 4.3V (throttle fully open)

Select Monitor Function Mode F09
Condition: Ignition switch ON (engine OFF)
Specified data: THV F09
0.3 - 0.7V (throttle fully closed)
3.9 - 4.3V (throttle fully open)
(Must be changed corresponding with accelerator pedal operation [from "released" to "depressed" position.])

CHECK HARNESSES AND CONNECTORS BETWEEN TCM AND TPS AND BETWEEN TCM AND ECM

Check Harness And Connectors Between TPS, TCM And ECM:

1. Unplug TCM connector.
2. Unplug connector from ECM.
3. Unplug connector from throttle position sensor.
4. Measure resistance between TCM connector and throttle position sensor connector.

Connector & Terminal Resistance
(B53) 20 - (E10) 2 0 ohms
(B53) 20 - body 1 M ohms, min.
(B53) 1 - (E10) 3 0 ohms
(B53) 1 - body 1 M ohms, min.

Check Harness And Connectors Between TPS, TCM And ECM:

5. Measure resistance between TCM and ECM connectors.

Connector & Terminal Resistance
(B53) 1 - (E30) 15 0 ohms

CHECK VOLTAGE OF POWER SUPPLY LINE

Check Power Supply Voltage:

1. Ignition switch ON (engine not running).
2. Measure voltage of throttle position sensor connector.

Connector & Terminal Voltage
(E10) 3 - 1 4.8 - 5.7V

Select Monitor Function Mode F14
Condition: Ignition switch ON (engine OFF)
Specified data: THVCC F14
4.8 - 5.7V
(Throttle position sensor power supply voltage is indicated.)

CHECK THROTTLE POSITION SENSOR

Check Throttle Position Sensor:

1. Unplug connector from throttle position sensor.
2. Measure resistance between throttle position sensor terminals.

Connector & Terminal Resistance
(E10) 1 - 2 500 ohms (throttle fully closed)
(E10) 1 - 3 5 K ohms (throttle fully open)