Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.

Verify the following conditions do not exist:
- Accessory drive bracket - Defective/Loose/Visible Damage
- Belt Driven Device - Defective/Loose/Visible Damage
- Brake Rotor - Excessive runout
- Component Malfunction - Transmission
- Drive Belt - Defective/Loose/Visible Damage
- Drive Shaft - Excessive runout
- During certain road conditions: Rough
- Fuel - Contaminated/Dirty/Fill Level = Low - Refer to: Contaminants-in-Fuel Diagnosis
- Fuel Pressure - Low - Refer to: Fuel System Diagnosis
- High resistance in the circuits of the component may set DTC P0300 without setting the DTC for the component: Q17 Fuel Injector
- If the condition is intermittent, wiggle the related wiring harnesses and connectors, with the ignition/vehicle on or engine running, while monitoring the scan tool circuit status parameters for the component. The parameters will display if there is a condition with the circuit or a connection.
- Tire and wheel assemblies which exhibit excessive runout can produce vibrations even if the assemblies are balanced.
- If a condition exists
  Repair or replace as necessary.
- Go to next step: If no conditions exist
Perform the following procedure/test: Fuel Injector Balance - Refer to: Fuel Injector Balance Test with Scan Tool
Verify the procedure/test passes.
- If the procedure/test does not pass
  Replace the component that failed the test: Q17 Fuel Injector
- Go to next step: If the procedure/test passes
Verify the condition does not exist: An engine mechanical condition. - Refer to: Symptoms - Engine Mechanical
- If a condition exists
  Repair or replace as necessary.
- Go to next step: If no condition exists
All OK.