Difference between revisions of "Engine: Adjust Throttle Position Sensor (TPS)"
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[[Category:Engine]] | [[Category:Engine]] | ||
| − | == | + | == How to Adjust the Idle Position Switch and Throttle Position Sensor (TPS) on a 3000GT/Stealth == |
| − | It is | + | |
| − | #Disconnect the | + | '''TIP''': It is suggested that you use a [http://www.harborfreight.com/32-piece-sae-metric-feeler-gauge-32214.html Feeler Gauge] to ensure accurate calibration. |
| − | #:[[Image:TPS1.jpg]] | + | |
| − | # | + | # '''Disconnect the Throttle Position Sensor's connector''' |
| − | # | + | #: [[Image:TPS1.jpg]] |
| − | #:[[Image:TPS2.jpg]] | + | # On the Throttle Position Sensor, '''connect terminal #3 (idle position switch) and terminal #4 (sensor ground) using an ohmmeter''' (using a set of jumper wires) |
| − | #:[[Image:TPSconnector.jpg]] | + | #: [[Image:TPS2.jpg]] |
| − | #Insert a 0. | + | #: [[Image:TPSconnector.jpg]] |
| − | #:[[Image:TPS3.jpg]] | + | # '''Insert a 0.65mm thick Feeler Gauge blade between the Fixed SAS and Throttle Lever''', as shown in the diagram below: |
| − | #Loosen the | + | #: [[Image:TPS3.jpg]] |
| − | #:[[Image:TPS4.jpg]] | + | # '''Loosen the Throttle Position Sensor mounting bolts''' and '''turn the TPS body fully counter-clockwise''' |
| − | # | + | #: [[Image:TPS4.jpg]] |
| − | #Slowly turn the | + | # '''Check that there is continuity (a complete circuit) across terminals #3 and #4''' using the ohmmeter |
| − | #:[[Image:TPS5.jpg]] | + | # '''Slowly turn the Throttle Position Sensor clockwise''' until you find a point at which the circuit breaks across terminals #3 and #4. Then, '''tighten the throttle position sensor mounting bolt securely''' |
| − | # | + | #: [[Image:TPS5.jpg]] |
| + | # '''Reconnect the Throttle Position Sensor connector''' | ||
#When using the multi-use tester, connect it to the diagnosis connector. | #When using the multi-use tester, connect it to the diagnosis connector. | ||
#When not using the multi-use tester, proceed as follows: | #When not using the multi-use tester, proceed as follows: | ||
Revision as of 00:19, April 27, 2015
Contents
How to Adjust the Idle Position Switch and Throttle Position Sensor (TPS) on a 3000GT/Stealth[edit]
TIP: It is suggested that you use a Feeler Gauge to ensure accurate calibration.
- Disconnect the Throttle Position Sensor's connector
- On the Throttle Position Sensor, connect terminal #3 (idle position switch) and terminal #4 (sensor ground) using an ohmmeter (using a set of jumper wires)
- Insert a 0.65mm thick Feeler Gauge blade between the Fixed SAS and Throttle Lever, as shown in the diagram below:
- Loosen the Throttle Position Sensor mounting bolts and turn the TPS body fully counter-clockwise
- Check that there is continuity (a complete circuit) across terminals #3 and #4 using the ohmmeter
- Slowly turn the Throttle Position Sensor clockwise until you find a point at which the circuit breaks across terminals #3 and #4. Then, tighten the throttle position sensor mounting bolt securely
- Reconnect the Throttle Position Sensor connector
- When using the multi-use tester, connect it to the diagnosis connector.
- When not using the multi-use tester, proceed as follows:
- Disconnect the throttle position sensor connectors and connect the special tool, Test Harness Set, between the disconnected connectors.
- Connect a digital voltmeter between the throttle position sensor terminal 2 (sensor output) and teminal 4 (sensor ground).
- Turn the ignition switch ON (but do not start the engine).
- Check the throttle position sensor output voltage. When using the multi-use tester, select item No. 14 and read the throttle position sensor output voltage. Standard value: 400 - 1,000 mV
- If the voltage is out of specification, check the throttle position sensor and associated harnesses.
- Remove the feeler gauge.
- Turn the ignition switch OFF.
Checking the Throttle Position Sensor[edit]
It is a good idea to check the throttle position sensor to make sure it's functioning correctly.
- Disconnect the throttle position sensor connector
- Measure rsistance between terminal 4 (sensor Ground) and Terminal 1 (sensor power) Standard value 3.5 - 6.5 Kilo Ohms
- Connect a pointer type ohmmeter between terminal 4(sensor ground) and terminal 2 (sensor output).
- Operate the throttle valve slowly from the idle position to the full open position and check that the resistance changes smoothly in proportion with the throttle valve opening angle.
- If the resistance is out of specification, or fails to change smoothly, replace the throttle position position sensor. Torque to 2.0 Nm (1.5 ft.lbs.)
Checking the Throttle Position Switch[edit]
To check the throttle position switch in order to verify that it is functioning correctly:
The Idle postition switch is different from the sensor, The switch is only used to tell the ECU if the the car is at Idle or not.
- With the accelerator pedal released, check to be sure that the throttle valve lever or the fixed SAS is pushed, if not adjust the fixed SAS
- Disconnect the throttle sensor connector.
- Check the continuity across the throttle position sneosr connector terminal 4 (sensor ground) and 3 (idle position switch)
Additional Factory Service Manual Details (91-94 Models)[edit]
