Component Inspection

Engine Control
P0123 Throttle / Pedal Position Circuit High Input - Component Inspection

Component Inspection

1. Ignition "OFF".
2. Disconnect TPS connector.
3. Measure resistance between terminals 2 and 3 of the sensor connector(Component side).
Specification : Approx. 1.6 - 2.4 kOhms at all throttle position




4. With still TPS connector disconnected, measure resistance between terminals 1 and 2 of the sensor connector(Component side).
5. Operate the throttle valve slowly from the idle position to the full open position and check the resistance changes smoothly in proportion with the throttle valve opening angle.
Specification : 0.71 - 1.38 kOhms at closed throttle valve, 2.2 - 3.4 kOhms at wide open throttle




6. Is resistance within the specification?
YES
> Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
NO
> Check TPS for contamination, deterioration, or damage. Substitute with a known-good TPS and check for proper operation. If the problem is corrected, replace TPS and then go to "Verification of Vehicle Repair" procedure.