Diagnostic Test

CHECK THE POWERTRAIN CONTROL MODULE (PCM) SOFTWARE LEVEL
NOTE:
An aftermarket block heater installed may cause this DTC to set.
1. Turn the ignition on.
2. With the scan tool, Verify that the PCM is operating at the latest software version available.
3. Perform any Service Bulletins or PCM flash updates that may apply.
  Were any Service Bulletins or PCM flash updates available for this condition?
  
  Yes
  - Perform the appropriate repair.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to: POWERTRAIN VERIFICATION TEST .
  No
  - Go To 2
CHECK THE AAT SENSOR FOR PROPER OPERATION
1. Turn the ignition off.
2. Allow the vehicle to sit with the ignition off in an environment where the temperature is consistent and above -7°C (19.4°F) until the engine coolant temperature is equal, or close to the environmental ambient temperature.
3. Turn the ignition on.
4. With a scan tool, compare the AAT Sensor value to the current ambient temperature.
  Is the AAT Sensor value within 10°C (18°F) of the current ambient temperature?
  
  Yes
  - Go To 3
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to; INTERMITTENT CONDITION .
CHECK THE COOLANT LEVEL AND CONDITION
WARNING:
Never open the cooling system when the engine is hot. The system is under pressure. Failure to follow these instructions can result in personal injury including extreme burns, scalding, or fatal injury. Allow the engine to cool before opening the cooling system.
1. Check that the coolant is in good condition and at the proper level. Refer to: COOLING SYSTEM - DIAGNOSIS AND TESTING .
  Is the coolant level and condition OK?
  
  Yes
  - Go To 4
  No
  - Inspect the vehicle for a coolant leak and add the necessary amount of coolant. Refer to: COOLING SYSTEM - STANDARD PROCEDURE .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to: POWERTRAIN VERIFICATION TEST .
CHECK THE COOLING SYSTEM FOR PROPER OPERATION
NOTE:
If engine coolant temperature is above 65°C (149°F), allow the engine to cool until it is below 65°C (149°F).
1. Start the engine.
2. During engine warm-up monitor the Engine Coolant Temperature degree value. The temperature value change should be a smooth transition from start up to normal operating temp 82°C (180°F). Also monitor the actual coolant temperature with a digital thermometer at or near the ECT Sensor and Thermostat positions.
  NOTE:
  As the engine warms up to operating temperature, the actual coolant temperature (thermometer reading) and the scan tool Engine Coolant Temperature degree values should stay relatively close to each other.
  
  Was the digital thermometer readings relatively close to the scan tool reading for the ECT Sensor?
  
  Yes
  - Go To 5
  No
  - Replace the Engine Coolant Temperature Sensor in accordance with the Service Information. Refer to:ENGINE SENSORS, REMOVAL AND INSTALLATION .
  - 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: 3.6L ENGINE - 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 .