Diagnostic Test

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

CHECK FOR OTHER DTCS
1. Refer to the recorded DTCs.
  Are there any other circuit related HP EGR DTCs (P245A-00, P245C-00, P245D-00, or P04DA-00) active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DTC INDEX (1 OF 2) and/or DTC INDEX (2 OF 2) .
  No
  - Go To 2
CHECK THE HP EGR VACUUM SUPPLY HOSES FOR CLOGGING, LEAKS, OR OTHER DAMAGE
NOTE:
This DTC is very often set due to damage to one of the Vacuum Supply Hoses.
1. Turn the ignition off.
2. Inspect the HP EGR Vacuum Supply Hose from the HP EGR to the HP EGR Cooling Bypass Solenoid.
3. Inspect the Vacuum Supply Hose from the HP EGR Cooling Bypass Solenoid to the HP EGR Cooling Bypass Actuator.
  Are either HP EGR Vacuum Supply Hose kinked, pinched, leaking, or otherwise damaged?
  
  Yes
  - Replace the damaged HP EGR Vacuum Supply Hose in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE HP EGR VACUUM SUPPLY
1. Start the engine.
2. Run the engine until it reaches normal operating temperature.
3. Disconnect the HP EGR Vacuum Supply Hose (from the engine) at the HP EGR Cooling Bypass Solenoid.
4. Connect a vacuum gauge to the disconnected hose.
  Does the vacuum gauge detect any vacuum coming from the engine?
  
  Yes
  - Go To 4
  No
  - Determine the loss of HP EGR vacuum to the HP EGR Cooling Bypass Solenoid and repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK THE HP EGR COOLING BYPASS SOLENOID FOR PROPER OPERATION
1. Turn the ignition off.
2. Reconnect the HP EGR Vacuum Supply Hose (from the engine) back to the HP EGR Cooling Bypass Solenoid.
3. Disconnect the Vacuum Supply Hose at the HP EGR Cooling Bypass Solenoid. This is the hose routed from the HP EGR Cooling Bypass Solenoid to the HP EGR Cooling Bypass Actuator.
4. Start the engine.
5. Connect a vacuum gauge to the HP EGR Cooling Bypass Solenoid outlet nozzle.
6. Using a jumper wire connected to ground, back probe the HP EGR Bypass Valve (K670) Signal circuit.
  Does the vacuum gauge detect any vacuum at the HP EGR Cooling Bypass Solenoid outlet nozzle?
  
  Yes
  - Go To 5
  No
  - Replace the HP EGR Cooler Bypass Valve Solenoid in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
INSPECT THE HP EGR COOLER FOR AN INTERNAL ISSUE
1. Turn the ignition off.
2. Inspect the HP EGR Cooler for a blockage and/or a internal bypass flap operation issue.
  Were any issues found with the HP EGR Cooler internally?
  
  Yes
  - Replace the HP EGR Cooler in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
INSTALL A NEW HP EGR COOLING BYPASS VALVE ACTUATOR AND RETEST FOR DTC
1. Install a new HP EGR Cooling Bypass Valve Actuator in accordance with the Service Information.
2. Turn the ignition on.
3. With the scan tool, erase DTCs.
4. Start the engine and test drive the vehicle.
5. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 7
  No
  - Installing a new HP EGR Cooling Bypass Valve Actuator repaired the fault.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Connect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .