Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
Diagnose any CAN C Bus Communication DTCs before continuing.
1. Turn the ignition one.
2. With the scan tool, select View DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECKING AAT SENSOR
1. Turn the ignition off.
2. Disconnect the Ambient Air Temperature Sensor (AAT) harness connector.
3. Turn the ignition on, engine not running.
4. With a scan tool, select View DTCs.
  NOTE:
  The scan tool should display the P0073-AMBIENT AIR TEMPERATURE SENSOR CIRCUIT HIGH DTC with the connector disconnected.
  
  Does the scan tool display the DTC described above?
  
  Yes
  - Verify that there is good pin to terminal contact at the AAT Sensor and BCM connectors. If ok, replace the Ambient Air Temperature Sensor.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (G31) AAT SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the BCM C4 harness connector.
3. Measure the resistance between ground and the (G31) AAT Signal circuit at the AAT Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the (G31) AAT Signal circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK FOR THE (G31) AAT SIGNAL CIRCUIT SHORTED TO THE (G931) SENSOR GROUND CIRCUIT
1. Measure the resistance between the (G931) Sensor ground circuit and the (G31) AAT Signal circuit at the AAT Sensor harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the short between the (G931) Sensor ground circuit and the (G31) AAT Signal circuit.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
BODY CONTROL MODULE (BCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the AAT Sensor and the BCM.
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 AAT Sensor and BCM C4 harness connector.
4. Perform any Technical Service Bulletins that may apply.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST.
  No
  - Replace and program the Body Control Module (BCM) in accordance with the service information.
    Perform the BODY VERIFICATION TEST.