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DTC P0506 or P0507

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0506 00: Idle Speed Low

DTC P0507 00: Idle Speed High

Circuit/System Description

The throttle actuator control (TAC) motor is controlled by the engine control module (ECM). The DC motor located in the throttle body drives the throttle blade. In order to decrease idle speed, along with spark and fuel delivery changes the ECM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the ECM commands the throttle plate open allowing more air to pass the throttle plate.

Conditions for Running the DTC
    • DTCs P0016 00, P0068 00, P0106 00, P0107 00, P0108 00, P0117 00, P0118 00, P0122 00, P0123 00, P0171 00, P0172 00, P0222 00, P0223 00, P0261 00, P0262 00, P0264 00, P0265 00, P0267 00, P0268 00, P0270 00, P0271 00, P0335 00, P0336 00, P0340 00, P0341 00, P0458 00, P0459 00, P0502 00, P2101 00, P2122 00, P2123 00, P2127 00, P2128 00 or P2138 00 are not set.
    • The engine has been running for more than 60 s.
    • The long term fuel trim is learned.
    • The vehicle speed is less than 3 km/h (2 MPH).
    • The engine coolant temperature (ECT) is between 70-109°C (160-228°F).
    • The intake air temperature (IAT) is between -7 to +105°C (+19 to +221°F).
    • The barometric pressure (BARO) is more than 72 kPa (10.4 PSI).
    • The ignition voltage is between 11-18 V.
    • DTC P0506 00 and P0507 00 run continuously when the above conditions are met.

Conditions for Setting the DTC

P0506 00

    • The actual idle speed is approximately 100 RPM lower than the desired idle speed.
    • The above condition is present for 15 s.

P0507 00

    • The actual idle speed is approximately 200 RPM greater than the desired idle speed.
    • The above condition is present for 15 s.

Action Taken When the DTC Sets

DTCs P0507 00 and P0507 00 are Type B DTCs.

Conditions for Clearing the DTC

DTCs P0506 00 and P0507 00 are Type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics

Connector End View Reference

Component Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

DTC Type Reference

Engine Controls Schematics

Scan Tool Reference

Control Module References

Circuit/System Verification
  1. If there are any other DTCs set, diagnose those first.
  2. Using a scan tool compare the desired engine idle speed to the actual engine idle speed.
    3. • Actual engine idle speed should be no greater than 100 RPM below desired.
    • Actual engine idle speed should be no greater than 200 RPM above desired.
  3. Operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.

Circuit/System Testing
  1. Inspect for any condition that can reduce idle speed by increasing engine load.
    2. • Incorrect torque converter clutch operation
    • Accessories that require additional torque to operate
    • Excessive deposits in the throttle body
    • Restricted exhaust
    • Mechanical conditions that limit engine speed
         ⇒If a condition is found, repair or replace as necessary.
  2. Inspect for the following conditions:
    3. • Vacuum leaks
    • A faulty positive crankcase ventilation (PCU) system
         ⇒If a condition is found, repair or replace as necessary.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

   


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