Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Improperly installed aftermarket accessories can cause this DTC to set. Check for any improperly installed aftermarket accessories before continuing with this test.
1. Turn the ignition on.
2. 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 SENSORS THAT SHARE THE 5-VOLT SUPPLY
1. IMPORTANT - FOLLOW THIS PROCEDURE EXACTLY WHEN CHECKING THE FOLLOWING COMPONENTS: Turn the ignition off before disconnecting each component. After a component has been disconnected, turn the ignition on and measure the voltage on the 5-Volt Supply 3 circuit at the component harness connector. If the 5-Volt Supply 3 voltage returns to 5.0 volts after disconnecting a component, the component that was disconnected is faulty. If the voltage remains low after disconnecting a component, then the disconnected component is not the problem. Leave each component disconnected and move on to the next until the faulty component is discovered or all components have been disconnected. Disconnect only one component at a time during this step.
2. Disconnect the Throttle Body harness connector and check the 5-Volt Supply 3 circuit voltage.
3. Disconnect the A/C Pressure Sensor harness connector and check the 5-Volt Supply 3 circuit voltage.
4. Disconnect the CMP Sensor harness connector and check the 5-Volt Supply 3 circuit voltage.
5. Disconnect the Fuel Rail Pressure Sensor harness connector and check the 5-Volt Supply 3 circuit voltage.
6. Disconnect the HT Coolant Control Valve harness connector and check the 5-Volt Supply 3 circuit voltage.
7. Disconnect the Fuel Tank Pressure Sensor harness connector and check the 5-Volt Supply 3 circuit voltage.
  Were any of the components determined to be at fault?
  
  Yes
  - Replace the faulty component in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
  No
  - Go To 3
CHECK THE SECONDARY 5-VOLT SUPPLY 3 CIRCUIT FOR A SHORT TO VOLTAGE
NOTE:
All of the components should still be disconnected during this test step.
1. Measure the voltage on the 5-Volt Supply 3 circuit at any of the harness connectors.
  Is the voltage reading above 5.2 volts?
  
  Yes
  - Repair the 5-Volt Supply 3 circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
  No
  - Go To 4
CHECK THE 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
  NOTE:
  All of the components should still be disconnected during this test step.
2. Disconnect the PCM harness connectors from the PCM.
3. Check for continuity between ground and the 5-Volt Supply 3 circuit at the PCM harness connectors.
  Is there continuity between ground and the 5-Volt Supply 3 circuit(s)?
  
  Yes
  - Repair the 5-Volt Supply 3 circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
  No
  - Go To 5
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. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL AND INSTALLATION .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .