Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, erase DTCs.
3. Turn the ignition off, wait 30 seconds.
4. Test drive the vehicle.
5. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE AIR FILTER FOR EXCESSIVE DIRT OR DEBRIS
1. Turn the ignition off.
2. Remove and inspect the Air Filter for soiling or excessive dirt and debris which may cause air flow restriction.
  Were any of these problems found?
  
  Yes
  - Replace the Air Filter element.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE INTAKE AIR SYSTEM FOR RESTRICTIONS
NOTE:
Inspect all air intake and Turbocharger related tubes for damage, restriction or poor/loose connection. Any of these conditions can cause a this DTC to set.
1. Inspect all air intake and Turbocharger related tubes and connections.
  Were any problems found?
  
  Yes
  - Repair or replace as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK FOR HIGH RESISTANCE IN THE (K37) BOOST PRESSURE SENSOR SIGNAL CIRCUIT
1. Disconnect the Boost Pressure Sensor harness connector.
2. Disconnect the PCM C2 harness connectors.
3. Measure the resistance of the (K37) Boost Pressure Sensor Signal circuit between the Boost Pressure Sensor harness connector and the PCM C2 harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (K37) Boost Pressure Sensor Signal circuit for high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK FOR HIGH RESISTANCE IN THE SENSOR GROUND CIRCUIT
1. Measure the resistance of the Sensor Ground circuit between the Boost Pressure Sensor harness connector and the PCM harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the Sensor Ground circuit for high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK FOR HIGH RESISTANCE IN THE (F856) 5-VOLT SUPPLY CIRCUIT
1. Measure the resistance of the (F856) 5-Volt Supply circuit between the Boost Pressure Sensor harness connector and the PCM harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Replace the Boost Pressure Sensor in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Repair the (F856) 5-Volt Supply circuit for high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .