Diagnostic Test

CHECK FOR AN ACTIVE DTC
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 ABILITY OF THE PCM TO READ THE ENGINE HOOD SWITCH SIGNAL
1. Turn the ignition off.
2. Disconnect the right Engine Hood Switch harness connector.
3. Turn the ignition on, engine not running.
4. With the scan tool, read DTCs.
  NOTE:
  The scan tool should display the P254F-ENGINE HOOD SWITCH CIRCUIT DTC as active or pending with the harness connector disconnected.
  
  Does the P254F-ENGINE HOOD SWITCH CIRCUIT DTC set as active or pending with the harness connector unplugged?
  
  Yes
  - Verify that there is good pin to terminal contact in the Engine Hood Switch 2 and Powertrain Control Module connectors. Replace the Engine Hood Switch 2 if no problems were found in the connector.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (K806) HOOD AJAR SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
3. Check for continuity between ground and the (K806) Hood Ajar Switch Signal circuit at the Engine Hood Switch harness connector.
  Is there continuity between ground and the (K806) Hood Ajar Switch Signal circuit?
  
  Yes
  - Repair the (K806) Hood Ajar Switch Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK FOR THE (K806) HOOD AJAR SWITCH SIGNAL CIRCUIT SHORTED TO THE (Z101) GROUND CIRCUIT
1. Disconnect the PCM C1 harness connector.
2. Check for continuity between the (K806) Hood Ajar Switch Signal circuit and the (Z101) Ground circuit at the Engine Hood Switch harness connector.
  Is there between the (K806) Hood Ajar Switch Signal circuit and the (Z101) Ground circuit?
  
  Yes
  - Repair the short between the (K806) Hood Ajar Switch Signal circuit and the (Z101) Ground circuit.
  - 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 the Powertrain Control Module 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
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  - Test complete.