P1510

Circuit Description
The ECM controls the throttle blade by applying varying voltage to the throttle valve motor. The ECM monitors the pulse width modulation that is required to move the throttle blade. If an incorrect amount of pulse width modulation is required to operate the throttle valve motor a DTC will set.

Conditions for Running the DTC
^ The battery voltage must be greater than 7 volts.
^ The DTC learn procedure must not be active.

Conditions for Setting the DTC
The Pulse Width Modulation (PWM) is greater than 80 percent for longer than 6 seconds.

Action Taken When the DTC Sets
The ECM illuminates the Malfunction Indicator Lamp (MIL) and records the operating conditions in the Freeze Frame on the first drive trip that the diagnostic runs and fails. The vehicle will default to the limp home mode.

Conditions for Clearing the MIL/DTC
^ The ECM turns off the MIL after 3 consecutive drive trips that the diagnostic runs and does not fail.
^ A History DTC clears after 40 consecutive warm up cycles in which no failures are reported by this diagnostic or any other emission related diagnostic.
^ The ECM battery voltage is interrupted.
^ The scan tool clears the MIL/DTC.

Diagnostic Aids

Notice: Refer to J 35616-A Connector Test Adapter Kit Notice in Service Precautions.

Use the J 35616-A connector test adapter kit for any test that requires probing the ECM harness connector or a component harness connector.

Check for the following conditions:
^ Poor connections at the ECM or at the component-Inspect the harness connectors for a poor terminal to wire connection.
^ Damaged harness-Inspect the wiring harness for damage. If the harness appears to be OK, observe the scan tool while moving the related connectors and the wiring harnesses. A change in the display may help locate the fault.

Refer to Symptoms for the Intermittents. Symptom Related Diagnostic Procedures