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Home >> Jeep >> 2018 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (3.0L Diesel - DTCS P0403-00 To P061C-00) >> DTC Troubleshooting >> P0506-00-Idle Speed Performance Lower Than Expected >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. CHECK THE ENGINE ACCESSORIES 
    1. Visually inspect the engine accessories for damage, binding or dragging.

      Were any problems found?

      Yes 

      • Repair as necessary in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go To  2
  2. CHECK FOR OTHER DTCS 
    1. Refer to the recorded DTCs.

      Are there any Transmission DTCs present involving the Torque Converter or lock up operation, or Intake Air System DTCs, or Fuel Delivery DTCs active or pending?

      Yes 

      No 

      • Go To  3
  3. CHECK THE INTAKE SYSTEM FOR A RESTRICTION 
    1. Visually inspect the entire Intake System for a restriction.

      Were any restrictions found?

      Yes 

      • Repair as necessary in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE EXHAUST SYSTEM FOR A RESTRICTION 
    1. Visually inspect the entire Exhaust System for a restriction.

      Were any restrictions found?

      Yes 

      • Repair as necessary in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE FUEL DELIVERY SYSTEM 
    1. Refer to CHECKING THE FUEL DELIVERY SYSTEM and perform the CHECKING THE FUEL DELIVERY SYSTEM diagnostic procedure.

      Were any problems found?

      Yes 

      • Repair as necessary in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .