Diagnostic Test

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

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs and record on the repair order.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK FOR OTHER DTCS
1. Refer to the recorded DTCs.
  Are there any 5-Volt Reference DTCs present?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to: DTC INDEX (1 OF 3) and/or DTC INDEX (2 OF 3) and/or DTC INDEX (3 OF 3) .
  No
  - Go To 3
CHECK THE (N8) 5-VOLT SUPPLY CIRCUIT VOLTAGE
1. Turn the ignition off.
2. Disconnect the ELCM harness connector.
3. Measure the voltage on the (N8) 5-Volt Supply circuit at the ELCM harness connector.
  Is the voltage between 4.8 and 5.2 volts?
  
  Yes
  - Go To 4
  No
  - Repair the (N8) 5-Volt Supply circuit for an open or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE (N7) FTP SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Disconnect the PCM C1 harness connector.
2. Check for continuity between ground and the (N7) FTP Sensor Signal circuit at the FTP Sensor harness connector.
  Is there continuity between ground and the (N7) FTP Sensor Signal circuit?
  
  Yes
  - Repair the (N7) FTP Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 5
CHECK FOR THE (N7) FTP SENSOR SIGNAL CIRCUIT SHORTED TO THE (N10) FTP SENSOR GROUND CIRCUIT
1. Check for continuity between the (N7) FTP Sensor Signal circuit and the (N10) FTP Sensor Ground circuit at the FTP Sensor harness connector.
  Is there continuity between the (N7) FTP Sensor Signal circuit and the (N10) FTP Sensor Ground circuit?
  
  Yes
  - Repair the short between the (N7) FTP Sensor Signal circuit and the (N10) FTP Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
CHECK THE ABILITY OF THE PCM TO READ THE FTP SENSOR SIGNAL
1. Reconnect the PCM C1 harness connector.
2. Connect a jumper between the (N7) FTP Sensor Signal circuit and the (N8) 5-Volt Supply circuit at the FTP Sensor harness connector.
3. Turn the ignition on.
  NOTE:
  The P1D0D EVAP SYSTEM FUEL TANK PRESSURE SENSOR HIGH DTC should display as active or pending with the jumper in place.
4. With the scan tool, read DTCs.
  Does the scan tool display as described above?
  
  Yes
  - Replace the FTP Sensor in accordance with the Service Information.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
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 .