Inspection And Verification
WARNING: This page is about a different variant/trim than selected.
CAUTION:
Diagnosis by substitution from a donor vehicle is NOT
acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle.
NOTE:
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
- Verify the customer concern.
- Visually inspect for obvious signs of mechanical or electrical damage.VISUAL INSPECTION
MECHANICAL ELECTRICAL - Gasoline particulate filter
- Differential pressure sensor hoses
- Differential pressure sensor metal pipes and unions
- Differential pressure sensor mounting position integrity
- Damaged gasoline particulate filter
- Gasket failure
- Flexible coupling
- Leaks
- Metal fatigue
- Pipes
- Catalytic converter
- Muffler(s)
- Joints
- Mountings
- Clearance around components
- Differential pressure sensor
- Differential pressure sensor connector
- Differential pressure sensor wiring harness
- Fuses
- Wiring harness
- Electrical connector(s)
- Sensor(s)
- Powertrain Control Module (ECM)
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.