Diagnostic Test

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

AAT SENSOR VOLTAGE BELOW 0.078 OF A VOLT
1. Ignition on, engine not running.
2. With a scan tool, read the AAT voltage.
  Is the voltage below 0.078 of a volt?
  
  Yes
  - Go To 2
  No
  - Perform the CHECKING FOR AN INTERMITTENT DTC diagnostic procedure. Refer to INTERMITTENT CONDITION .
AAT SENSOR
1. Turn the ignition off.
2. Disconnect the AAT harness connector.
3. Ignition on, engine not running.
4. With a scan tool, read AAT voltage.
  Is the voltage above 1.0 volt?
  
  Yes
  - Replace the AAT Sensor.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
(G31) AAT SIGNAL CIRCUIT SHORTED TO THE (G931) AAT RETURN CIRCUIT

Fig 1: Measuring Resistance Between AAT Return Circuit & AAT Signal Circuit In AAT Sensor Harness Connector
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the C4 TIPM harness connector.
3. Measure the resistance between the (G931) AAT Return circuit and the (G31) AAT Signal circuit in the AAT Sensor harness connector.
  Is the resistance below 1000 ohms?
  
  Yes
  - Repair the short to between the (G931) AAT Return circuit and the (G31) AAT Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
(G31) AAT SIGNAL CIRCUIT SHORTED GROUND

Fig 2: Measuring Resistance Between Ground & AAT Signal Circuit In AAT Sensor Harness Connector
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (G31) AAT Signal circuit in the AAT Sensor harness connector.
  Is the resistance below 1000 ohms?
  
  Yes
  - Repair the short to ground in the (G31) AAT Signal circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
TOTALLY INTEGRATED POWER MODULE (TIPM)
NOTE:
Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
1. Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace and program the Totally Integrated Power Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .