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Subaru Crosstrek Service Manual: Dtc p0506 idle control system rpm - lower than expected

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0506 IDLE CONTROL SYSTEM RPM - LOWER THAN EXPECTED

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

Hard to start the engine.

Engine does not start

Improper idling

Engine stall

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode > PROCEDURE">.

STEPCHECKYESNO

1.CHECK FOR ANY OTHER DTC ON DISPLAY.

Is any other DTC displayed?

Check the appropriate DTC using the “List of Diagnostic Trouble Code (DTC)”. List of Diagnostic Trouble Code (DTC)">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0506 IDLE CONTROL SYSTEM RPM - LOWER THAN EXPECTED">Go to Step 2.

2.CHECK AIR CLEANER ELEMENT.

1) Turn the ignition switch to OFF.

2) Check the air cleaner element.

Is there excessive clogging on air cleaner element?

Replace the air cleaner element. Air Cleaner Element">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0506 IDLE CONTROL SYSTEM RPM - LOWER THAN EXPECTED">Go to Step 3.

3.CHECK ELECTRONIC THROTTLE CONTROL.

1) Remove the electronic throttle control. Throttle Body > REMOVAL">

2) Check the electronic throttle control.

Are foreign matter found inside electronic throttle control?

Remove foreign matter from electronic throttle control.

Perform the diagnosis of DTC P2101. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P2101 THROTTLE ACTUATOR "A" CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE">

1. OUTLINE OF DIAGNOSIS

Detect the malfunction that actual engine speed is not close to target engine speed during idling. Judge as NG when actual engine speed is not close to target engine speed during idling.

2. EXECUTION CONDITION

Secondary parameters

Execution condition

Battery voltage

≥ 10.9 V

Barometric pressure

≥ 75.1 kPa (563 mmHg, 22.2 inHg)

Lambda value (left and right)

≥ 0.85

and

< 1.151

Vehicle speed

0 km/h (0 MPH)

Engine coolant temperature

≥ 60 &#x00B0;C (140 &#x00B0;F)

Elapsed time after starting the engine

≥ 10 s

Accelerator pedal position

While idling

Elapsed time after gear position change

(P ←> D or N ←> D)

> 5 s

Cold start diagnosis

Not in operation

Main feedback

In operation

Idle speed control feedback

In operation

3. GENERAL DRIVING CYCLE

Perform the diagnosis continuously at idling after warming up engine.

4. DIAGNOSTIC METHOD

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment value

Malfunction Criteria

Threshold Value

Actual engine speed − Targeted engine speed

< −100 rpm

Time needed for diagnosis: 15 s ? 1 time(s)

Malfunction indicator light illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

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