P0510

Diagnostic Chart:

Wiring Diagram:

Circuit Description

The Throttle Position (TP) sensor has a Closed Throttle Position (CTP) switch that sends a signal to the Powertrain Control Module (PCM). The PCM applies 6 volts to the CTP switch. The CTP switch is closed when the throttle valve is closed, and the CTP switch is open when the throttle valve is open The PCM receives a low voltage signal from the CTP switch when the engine is idling, and receives a high voltage signal from the CTP switch when the engine is above idle.

Conditions for Setting the DTC

The following conditions are present for 10 seconds, and occur 3 times

- High voltage input at the PCM indicated with the engine running at idle.

- Engine speed is less than 1000 RPM

- The CTP switch is open (Not Idle).

OR

The following conditions are present for 3 seconds.

- Greater than 300 throttle valve opening.

- Engine speed is greater than 2300 RPM.

- The CTP switch is closed (Idle).

- Engine load greater than 40%.

Action Taken When the DTC Sets

- The Malfunction Indicator Lamp (MIL) will illuminate.

- The PCM will record operating conditions at the time the diagnostic tails. This information will be stored in the Freeze Frame buffer.

Conditions for Clearing the MIL/DTC

- The MIL will turn off after three consecutive drive cycles without a fault present.

- A DTC will clear after 40 consecutive warm-up cycles without a fault.

- The DTCs can be cleared by using a scan tool or by disconnecting the PCM battery feed.

Diagnostic Aids

Check for any of the following conditions:

- A poor connection at the PCM. Inspect the harness connectors for backed out terminal, improper mating, broken locks, improperly formed or damaged terminals, and a poor terminal to wire connection.

- A damaged wiring harness. Inspect the wiring harness for damage and repair as necessary.

- An incorrectly adjusted TP sensor could cause a DTC P051 0 to set. Refer to TP sensor Replacement /Adjustment.

If the DTC P0510 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions since the DTC was last set. This may assist in determining how often the DTC sets.

If any wiring repairs need to be made, Refer to Repair Procedures in Diagrams/Electrical.

Test Description

The numbers below refer to the step numbers in the Diagnostic Table.

1. The Powertrain (OBD) System Check prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.

4. Review the Freeze Frame data to determine when the DTC set. Always record this information.

5. The CTP switch is located inside the TP sensor. When a faulty CTP switch is determined, replace the TP sensor.