Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read Powertrain Control Module 1 (PCM-1) DTCs and Freeze Frame Data and record on the repair order.
  NOTE:
  If there are any ASD/Main Relay or system voltage DTCs present, diagnose those DTCs.
2. Using the recorded Freeze Frame Data and the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
3. With the scan tool, read PCM-1 DTCs.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE FUEL PRESSURE SENSOR (K181) PRESSURE SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Fuel Pressure Sensor harness connector.
3. Disconnect the PCM C2 harness connector.
4. Check for continuity between ground and the Fuel Pressure Sensor (K181) Pressure Signal circuit at the Fuel Pressure Sensor harness connector.
  Is there continuity between ground and Fuel Pressure Sensor (K181) Pressure Signal circuit?
  
  Yes
  - Repair Fuel Pressure Sensor (K181) Pressure Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK FOR THE FUEL PRESSURE SENSOR (K181) PRESSURE SIGNAL CIRCUIT SHORTED TO THE FUEL PRESSURE SENSOR (K917) SENSOR GROUND
1. Check for continuity between Fuel Pressure Sensor (K181) Pressure Signal circuit and the Fuel Pressure Sensor (K917) Sensor Ground circuit at the Fuel Pressure Sensor harness connector.
  Is there continuity between Fuel Pressure Sensor (K181) Pressure Signal circuit and the Fuel Pressure Sensor(K917) Sensor Ground circuit?
  
  Yes
  - Repair Fuel Pressure Sensor (K181) Pressure Signal circuit for a short to the Fuel Pressure Sensor (K917) Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE ABILITY OF THE PCM-1 TO READ THE FUEL PRESSURE SENSOR SIGNAL
1. Turn the ignition off.
2. Connect the PCM-1 C2 harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.
  NOTE:
  The PCM should display the DTC P2542-00-LOW PRESSURE FUEL SYSTEM SENSOR CIRCUIT HIGH DTC with the connector unplugged
  
  Does the scan tool display the DTC as described above?
  
  Yes
  - Replace the Fuel Pressure Sensor in accordance with the Service Information. Refer to SENSOR, FUEL RAIL PRESSURE, REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK RELATED PCM AND COMPONENT CONNECTIONS
1. Perform any Service Bulletins that apply.
2. Disconnect all PCM harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. 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.
6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
11. 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. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .