P0507

DTC P0507

DTC DESCRIPTORS

DTC P0506
Idle Speed Low

DTC P0507
Idle Speed High

DIAGNOSTIC FAULT INFORMATION
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Testing and Inspection

CIRCUIT/SYSTEM DESCRIPTION
The throttle actuator control (TAC) motor is a DC motor that is part of the throttle body assembly. The TAC motor drives the throttle valve. The engine control module (ECM) controls the TAC motor based on throttle position sensor input. The idle speed is controlled by the ECM based on various inputs. The ECM commands the TAC motor to open or close the throttle valve in order to maintain the desired idle speed.

CONDITIONS FOR RUNNING THE DTC
- The engine is idling.
- The engine run time is greater than 2 seconds.
- The evaporative emission (EVAP) purge flow is less than 100 percent.
- The barometric pressure (BARO) is greater than 72 kPa.
- The intake air temperature (IAT) is greater than -20°C (-4°F).
- The engine coolant temperature (ECT) is greater than -10°C (14°F).
- The ignition voltage is between 11-16 volts.
- The DTCs run when the above conditions are met for 3 seconds.

CONDITIONS FOR SETTING THE DTC

P0506
The actual engine speed is less than the desired idle speed by at least 100 RPM for 10 seconds.

P0507
The actual engine speed is more than the desired idle speed by at least 200 RPM for 10 seconds.

ACTION TAKEN WHEN THE DTC SETS
DTCs P0506, and P0507 are Type B DTCs.

CONDITIONS FOR CLEARING THE DTC
DTCs P0506, and P0507 are Type B DTCs.

CIRCUIT/SYSTEM VERIFICATION
1. Allow the engine to idle within the conditions for running the DTCs for 1 minute. DTCs P0506 or P0507 should not set.
2. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.

CIRCUIT/SYSTEM TESTING
Engine idling, command the engine speed up to 1,400 RPM, down to 600 RPM, up to 1,400 RPM with a scan tool. Verify that the engine speed is within 100 RPM of the commanded speed.
- If the engine speed parameter is above the commanded speed inspect for the following:
- The engine for vacuum leaks
- The throttle valve for the correct operation-A throttle valve that does not close correctly sets this DTC.
- The crankcase ventilation system for the correct operation-Inspect for the following conditions:
- The correct positive crankcase ventilation (PCV) valve is used.
- The routing of the PCV system
- Vacuum leaks in the PCV system
- If the engine speed parameter is below the commanded speed inspect for the following:
- Excess deposits in the throttle body
- A parasitic load on the engine-For example, a transmission condition, a belt driven accessory condition

REPAIR INSTRUCTIONS
Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests