P0506 - Idle Control System RPM Lower Than Expected
On Board Diagnostic Logic
• Self-diagnosis detection logic.
• If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
DTC NO. DTC DEFINITION
DTC DETECTION
CONDITION
DTC SET
CONDITION
POSSIBLE CAUSE
P0506
Idle control system
RPM lower than
expected
• Engine is running
• With the engine
idling, the brake
applied, engine run
time below a
calibrated minimum
value, and no VSS,
MAF/MAP, ECT,
TPS, ETC,
Crankshaft Position
sensor, fuel system,
or injector DTCs
present.
ECM detected that
the idle speed is
less than the
acceptable range.
• Electronic throttle
control actuator
• Intake air leak
• ECM
DTC Confirmation Procedure:
Before performing the following procedure, confirm that battery voltage is more than 12 V.
• Turn ignition switch off.
• Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available.
• Turn ignition switch on.
• With the scan tool, record and erase stored DTCs in the ECM.
• Start the engine and warm it to normal operating temperature.
• With the scan tool, select view DTCs in the ECM.
• If the DTC is detected, the condition is current. Go to Diagnostic Procedure - Step 1.
• If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou-
bleshooting in Section 03 Electronic Engine Controls for more information).
NOTE :
While performing electrical diagnosis & testing, always refer to the electrical schematics for specific circuit
and component information.
Diagnostic Procedure
1.
CHECK INTAKE AIR LEAK
• Start the engine and let it idle.
• Listen for an intake air leak after the mass air flow sensor.
Is the check result normal?
Yes
>> Go to the next step.
No
>> Repair the air leak as necessary.
DIAGNOSIS & TESTING
03–140
Chery Automobile Co., Ltd.
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