P1515

Schematic:

CIRCUIT DESCRIPTION
The commanded throttle position, based on accelerator pedal position and possibly other limiting factors, is compared to the actual throttle position. The PCM monitors the Commanded and actual throttle position. This DTC sets if the PCM detects the problem.

CONDITIONS FOR RUNNING THE DTC
^ No other ETC DTCs are set.
^ No PCM processor DTCs are present.
^ The ignition is in the crank or run position.
^ The ignition voltage is more than 8.5 volts with key ON engine OFF.
^ The ETC system is not in the battery saver mode.

CONDITIONS FOR SETTING THE DTC
The PCM detects that the commanded and actual throttle positions are not within a calibrated range of each other.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will illuminate the MIL during the first trip in which the diagnostic runs and fails.
^ It equipped with traction control, the PCM will command the EBTCM via the serial data circuit to turn OFF traction control and illuminate the TRACTION OFF lamp.
^ The PCM will store conditions which were present when the DTC set as Freeze Frame/Failure Records data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.
^ The History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
Inspect for the following:

IMPORTANT: Ensure that the starting and charging systems are operating properly. Low system voltage causes this DTC to set.

If you do not find any trouble, check for mechanical problems or binding that may be temperature related. Components may not move freely in extreme heat or cold due to the presence of contaminants or ice formation.

IMPORTANT: Remove any debris from the connector surfaces before servicing a component. Inspect the connector gaskets when diagnosing or replacing a component. Ensure that the gaskets are installed correctly. The gaskets prevent contaminate intrusion.

^ Poor terminal connection.
Inspect the harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, and faulty terminal to wire connection. Use a corresponding mating terminal to test for proper tension. Refer to Testing for Intermittent and Poor Connections and Connector Repairs in Diagrams.
^ Damaged harness.
Inspect the wiring harness for damage. If the harness appears to be OK, observe the display on the scan tool while moving connectors and wiring harnesses related to the sensor. A change in the display may indicate the location of the fault. Refer to Wiring Repairs in Diagrams.
^ Inspect the PCM and the engine grounds for clean and secure connections.

If the DTC is determined to be intermittent, reviewing the Failure Records can be useful in determining when the DTC was last set.

TEST DESCRIPTION

Steps 1 - 4:

Steps 5 - 18:

The numbers below refer to the step numbers on the diagnostic table.
3. If the TP indicated angle does not follow the movement of the throttle blade, and no TP sensor DTCs are set, there is a mechanical problem with the throttle shaft or the TP sensor. Replace the throttle body assembly. Re-install the air inlet duct after repairs are completed.
18. When the PCM detects a problem within the ETC System other DTCs may set due to the many redundant tests run continuously on this system. Locating and repairing one individual problem may correct more than one DTC. Keep this in mind when reviewing captured DTC info.