Dodge 2004 Neon SX2 Diagnostic Manual page 527

P0506-IDLE SPEED LOW PERFORMANCE —
TEST
1 Ignition on, engine not running.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Refer to the INTERMITTENT CONDITION symptom in the
No
2 Visually and Physically inspect the PCV system.
Check for the PCV valve disconnected.
Check for an incorrect PCV valve. The PCV valve must meet OEM specifications.
Damage vacuum hose.
Were any of the above condition found?
Yes → Repair as necessary.
→ Go To 3
No
3 Turn the ignition off.
Remove the IAC Motor.
Inspect the IAC Motor and passages for any obstructions or damage to motor.
Were any problems found?
Yes → Repair as necessary.
→ Go To 4
No
4 Start the engine.
Inspect the vehicle for external vacuum leaks.
Inspect the engine for internal vacuum leaks.
Were any vacuum leaks found?
Yes → Repair the vacuum leak as necessary.
→ Go To 5
No
5 Inspect the Air Induction System for the following problems.
Restrictions: Dirty Air Cleaner, Foreign material trapped in the air intake tube, etc.
Leaks: Air Intake tube connection, Air Cleaner housing, etc.
Were any problems found?
Yes → Repair or replace as necessary.
→ Go To 6
No
6 Inspect the throttle body plate carbon build up or other restrictions.
Inspect the throttle linkage for binding and smooth operation.
Ensure the throttle plate is resting on the stop at idle.
Were any problems found?
Yes → Repair or replace as necessary.
→ Test Complete.
No
ACTION
Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
Perform POWERTRAIN VERIFICATION TEST VER - 5 - NGC.
DRIVEABILITY - NGC
Continued
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APPLICABILITY
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