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">.
| STEP | CHECK | YES | NO |
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 °C (140 °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.
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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