Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Start the engine and allow it to reach normal operating temperature.
  WARNING:
  When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
  
  NOTE:
  Diagnose and repair any system voltage DTCs before continuing with this test.
2. Using the scan tool, select View DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Go To 2.
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
AAT SENSOR

Fig 1: Ambient Air Temperature Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Ambient Air Temperature Sensor harness connector.
3. Ignition on, engine not running.
4. With a scan tool, read AAT Sensor voltage.
5. Connect a jumper wire between the (G31) AAT Signal circuit and the (G931) Sensor Ground circuit in the AAT Sensor harness connector.
  NOTE:
  The sensor voltage should be approximately 0.0 Volts (plus or minus 0.1 of a Volt) with the jumper wire in place.
  
  Does the scan tool display the voltage as described above?
  
  Yes
  - Verify that there is good pin to terminal contact in the Sensor and Control Module connectors. Replace the Ambient Air Temperature Sensor if no problems were found with the connectors.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3.
(G31) AAT SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 2: Measuring Voltage On AAT Signal Circuit In AAT Sensor Harness Connector
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Remove the jumper wire.
3. Disconnect the TIPM C4 harness connector.
4. Ignition on, engine not running.
5. Measure the voltage on the (G31) AAT Signal circuit in the AAT Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (G31) AAT Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4.
(G31) AAT SIGNAL CIRCUIT OPEN

Fig 3: Checking For Excessive Resistance In AAT Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance of the (G31) AAT Signal circuit from the AAT Sensor harness connector to the TIPM C4 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 5.
  No
  - Repair the open in the (G31) AAT Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
(G931) SENSOR GROUND CIRCUIT OPEN

Fig 4: Checking Sensor Ground Circuit For Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (G931) Sensor Ground circuit from the AAT Sensor harness connector to the TIPM C4 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 6.
  No
  - Repair the open in the (G931) Sensor Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
TOTALLY INTEGRATED POWER MODULE (TIPM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the AAT Sensor and the TIPM.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the Sensor and Control Module connectors.
4. Perform any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the TIPM in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .