With Throttle Actuator Control

DTC P0507 (WITH THROTTLE ACTUATOR CONTROL)

CIRCUIT DESCRIPTION
The electronic throttle control (ETC) system uses various inputs from the powertrain control module (PCM). This system uses these inputs to control the idle speed through serial data circuits to the throttle actuator control (TAC) module. The DC motor, which is located on the throttle body, activates the throttle plate. In order to decrease idle speed, the TAC module commands the throttle closed, reducing air flow into the engine, and the idle speed decreases. In order to increase the idle speed, the TAC module commands the throttle plate open, allowing more air in order to bypass the throttle plate. If the actual idle RPM does not match the desired idle RPM within a calibrated time, DTC P0507 sets.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC P0507 Idle Speed High

CONDITIONS FOR RUNNING THE DTC
- DTCs P0101, P0102, P0103, P0107, P0108, P0112, P0113, P0117, P0118, P0120, P0125, P0171, P0172, P0174, P0175, P0200, P0220, P0300, P0440, P0442, P0443, P0496, P0500, P0502, P0503, P2135 are not set.
- The engine is running for more than 60 seconds.
- The engine coolant temperature (ECT) is more than 60°C (140°F).
- The intake air temperature (IAT) is more than -10°C (+14°F).
- The barometric pressure (BARO) is more than 65 kPa.
- The system voltage is between 9-18 volts.
- The vehicle speed is less than 1.7 km/h (1 mph).
- The accelerator pedal position (APP) sensor is at 0 percent.
- DTC P0507 runs continuously once the above conditions are met.

CONDITIONS FOR SETTING THE DTC
The PCM detects that the actual idle speed is 200 RPM more than the desired idle speed for 5 continuous seconds.

ACTION TAKEN WHEN THE DTC SETS
- The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
- The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
- The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
- A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
- A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
- Clear the MIL and the DTC with a scan tool.

TEST DESCRIPTION

Steps 1 - 6:

The number below refers to the step number on the diagnostic table.
2. This test determines if the engine can achieve the commanded RPM.