Why am I getting crazy votage readings from my TPS?
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Why am I getting crazy votage readings from my TPS?
I got a new TPS because my old one was way out of spec. At WOT the votage on the bottom wire was double what it should be and the top wire just maxed out the needle on the voltometer. I replaced it and its not any different. Why am I getting crazy voltage readings? Is it my actual wiring harness?
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1993 Mazda RX7 2RTR-1308cc 80
Vehicle Level Powertrain Management Fuel Delivery and Air Induction Throttle Position Sensor Testing and Inspection
Testing and Inspection
Notes
Throttle Sensor Adjustment
Warm engine to operating temperature and run at idle. Verify that throttle is off fast idle cam and stop engine.
Connect SST's, or equivalent, as shown. Turn ignition ON.
Throttle Sensor Specifications
Rotate throttle link by hand and verify voltage is within specification.
If not, adjust sensor and check again. If still not correct, replace sensor.
Vehicle Level Powertrain Management Fuel Delivery and Air Induction Throttle Position Sensor Testing and Inspection
Testing and Inspection
Notes
Throttle Sensor Adjustment
Warm engine to operating temperature and run at idle. Verify that throttle is off fast idle cam and stop engine.
Connect SST's, or equivalent, as shown. Turn ignition ON.
Throttle Sensor Specifications
Rotate throttle link by hand and verify voltage is within specification.
If not, adjust sensor and check again. If still not correct, replace sensor.
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Originally Posted by Gamezilla
I got a new TPS because my old one was way out of spec. At WOT the votage on the bottom wire was double what it should be and the top wire just maxed out the needle on the voltometer. I replaced it and its not any different. Why am I getting crazy voltage readings? Is it my actual wiring harness?
TPS Connector Leads (4 lined up vertically) and Required Voltages:
(1) 2nd from top (green wire with red stripe), this goes to the
3F ECU connector. Closed throttle +V range is 0.75 to 1.25.
Fully opened throttle +V range is 4.8 to 5.0.
(2) Bottom (black wire with green stripe), this goes to the 3G
ECU connector. Closed throttle +V range is 0.1 to 0.7.
Fully opened throttle +V range is 4.2 to 4.6.
These are the positive connections. The negative goes to engine or chassis ground.
Now tell us what the your meter reads instead of saying high/low/pegged!
Last edited by cewrx7r1; 09-18-04 at 03:15 PM.
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the connections and specifications are listed in the pics. I f you are not getting anything close to what the specs are you are probably not tapped into the proper wire. Look closely at the diagram and you will see the tps and the color codes for the connections. This is Mazda info.
Be sure to set the voltage scale on the dvom to 12v dc
Be sure to set the voltage scale on the dvom to 12v dc
Last edited by xb2002; 09-18-04 at 03:09 PM.
#7
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With my new TPS sensor I get perfect readings with the throttle closed. Tapping the right wires. At WOT the bottom black wire reads just over 8v and the top one goes past 10 (my multimeter only reads to 10)
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#8
Different readings from TPS
1993 Mazda RX7 2RTR-1308cc 80
Vehicle Level Powertrain Management Fuel Delivery and Air Induction Throttle Position Sensor Testing and Inspection
Testing and Inspection
Notes
Throttle Sensor Adjustment
Warm engine to operating temperature and run at idle. Verify that throttle is off fast idle cam and stop engine.
Connect SST's, or equivalent, as shown. Turn ignition ON.
Throttle Sensor Specifications
Rotate throttle link by hand and verify voltage is within specification.
If not, adjust sensor and check again. If still not correct, replace sensor.
Vehicle Level Powertrain Management Fuel Delivery and Air Induction Throttle Position Sensor Testing and Inspection
Testing and Inspection
Notes
Throttle Sensor Adjustment
Warm engine to operating temperature and run at idle. Verify that throttle is off fast idle cam and stop engine.
Connect SST's, or equivalent, as shown. Turn ignition ON.
Throttle Sensor Specifications
Rotate throttle link by hand and verify voltage is within specification.
If not, adjust sensor and check again. If still not correct, replace sensor.
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