Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition off.
2. If possible, allow the vehicle to sit with the ignition off for more than 480 minutes in an environment where the temperature is consistent and above -7°C (19.4°F).
3. Test drive the vehicle. The vehicle must exceed 48 km/h (30 mph) during the test drive. Do not cycle the ignition off when the test drive is completed.
4. With the scan tool, select View the DTCs.
  NOTE:
  All ECT, Intake Air and Ambient Air Temperature Sensor codes must be diagnosed and repaired before continuing.
  
  NOTE:
  In cold weather, this DTC could be set by a high powered block heater and no repair would be required.
  
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
TEMPERATURE SENSOR CIRCUIT
1. With the scan tool, read the ECT, Ambient Air Temp and Intake Air Temp Sensor temp values.
2. Start the engine.
3. Allow the engine to reach normal operating temperature while monitoring the three Sensor temperature values.
  Is the temperature for each of the Sensors increasing properly?
  
  Yes
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
  No
  - Go To 3
TEMPERATURE SENSOR
1. Disconnect the suspected sensor.
2. Turn the ignition on.
3. With the scan tool, read the voltage of the suspected Sensor.
4. Connect a jumper between the Sensor Signal circuit and the Sensor ground circuit of the ECT Sensor, IAT Sensor and AAT Sensor.
  Did the voltage reading start at 4.8 to 5.0 volts and decrease to 0.0 volts when the jumper was installed?
  
  Yes
  - Verify that there is good pin to terminal contact in the Sensor and Control Module connectors. If OK, replace the appropriate Temperature Sensor. Refer to SENSOR, COOLANT TEMPERATURE, REMOVAL . or Refer to SENSOR, AIR TEMPERATURE, INTAKE, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK FOR EXCESSIVE RESISTANCE IN THE TEMPERATURE SENSOR SIGNAL CIRCUIT
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
  CAUTION:
  Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.
3. Connect the (special tool #10436, Adapter, GPEC Diagnostic).
4. Disconnect the BCM E harness connector.
5. Measure the resistance of the Sensor Signal circuit between the Sensor harness connector and the appropriate terminal of GPEC Adaptor for the ECT Sensor and IAT Sensor.
6. Measure the resistance of the AAT Sensor Signal circuit between the Sensor harness connector and the BCM E harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the excessive resistance in the Temperature Sensor Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK FOR EXCESSIVE RESISTANCE IN THE SENSOR GROUND CIRCUIT
1. Measure the resistance of the Sensor Ground circuit between the ECT Sensor and IAT Sensor and the appropriate terminal of GPEC Adaptor.
2. Measure the resistance of the Sensor Ground circuit between the AAT Sensor harness connector and the BCM E harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Go To 6
  No
  - Repair the excessive resistance in the Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
CHECK THE SENSOR SIGNAL CIRCUITS FOR A SHORT TO GROUND
1. Check for continuity between ground and the Sensor Signal circuits at the Sensor harness connectors.
  Is there continuity between ground and a Sensor Signal circuit?
  
  Yes
  - Repair the Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
CHECK FOR THE SENSOR SIGNAL CIRCUIT SHORTED TO THE SENSOR GROUND CIRCUIT
1. Check for continuity between the Sensor Ground and the Sensor Signal circuits at the Sensor harness connectors.
  Is there continuity between the Sensor Ground and a Sensor Signal circuit?
  
  Yes
  - Repair the short between the Sensor ground circuit and the Sensor Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 8
CHECK THE SENSOR SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage between ground and the Sensor Signal circuit at the Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the Sensor Signal circuit for a short to voltage.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 9
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, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  - Test complete.