Diagnostic Test

CHECK FOR OTHER DTCS
1. With the scan tool, read DTCs and record on the repair order.
  Are there any 5-Volt Reference or Purge Solenoid circuit DTCs active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to 2.0L - DIAGNOSTIC CODE INDEX .
  No
  - Go To 2
CHECK THE VACUUM SUPPLY AT THE OUTLET OF THE PURGE SOLENOID
1. Turn the ignition off.
2. Remove the vacuum line from the outlet port of the Purge Solenoid (this is the line that leads to the Charcoal Canister).
3. Connect a vacuum gauge to the outlet port of the Purge Solenoid.
4. Start the engine and allow it to idle long enough for the Purge Solenoid to cycle on.
5. Check the vacuum supply at the Purge Solenoid outlet port.
  Is engine vacuum present?
  
  Yes
  - Go To 4
  No
  - Go To 3
CHECK THE PURGE SOLENOID FOR PROPER OPERATION
1. Using a hand vacuum pump connected to the Purge Solenoid, apply 5.0 inches Hg to the "CAN" side of the Purge Solenoid.
2. Turn the ignition on.
3. With the scan tool, actuate the Purge Solenoid to on.
  NOTE:
  The vacuum should be purged immediately when the Purge Solenoid is energized.
  
  Did the vacuum purge after the Purge Solenoid is actuated?
  
  Yes
  - Repair the purge tube between the Purge Solenoid and the Intake Manifold for a leak or obstruction.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace the Purge Solenoid in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
VISUALLY CHECK FOR A BLOCKAGE BETWEEN THE PURGE SOLENOID AND THE CHARCOAL CANISTER
1. Turn the ignition off.
2. Check for the purge tube to be pinched/bent/blocked between the Purge Solenoid, Fuel Tank and Charcoal Canister.
  Were any of the above conditions found?
  
  Yes
  - Replace the purge tube in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (F856) 5-VOLT SUPPLY VOLTAGE AT THE MAP SENSOR
1. Disconnect the MAP Sensor harness connector.
2. Turn the ignition on.
3. Measure the voltage on the (F856) 5-Volt Supply circuit at the FTP Sensor harness connector.
  Is the voltage between 4.8 and 5.2 volts?
  
  Yes
  - Go To 6
  No
  - Repair the (F856) 5-Volt Supply circuit for an open circuit or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
REPLACE THE MAP SENSOR AND RETEST FOR DTC
1. Replace the MAP Sensor in accordance with the Service Information. Refer to SENSOR, TMAP-INTAKE MANIFOLD, REMOVAL AND INSTALLATION .
2. Connect the MAP Sensor and PCM harness connectors.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Using the recorded Freeze Frame and the When Monitored conditions, operate the vehicle in the conditions that set the DTC.
6. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 7
  No
  - Replacing the MAP Sensor repaired the fault.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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 .