Diagnostic Test

AAT SENSOR VOLTAGE ABOVE 4.98 VOLTS
1. Ignition on, engine not running.
2. With a scan tool, read the AAT voltage.
  Is the voltage above 4.98 volts?
  
  Yes
  - Go to step 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
AAT SENSOR
1. Turn the ignition off.
2. Disconnect the AAT harness connector.
3. Connect a jumper wire between the (G31) AAT Signal circuit and the (G931) AAT Return circuit in the AAT harness connector.
4. Ignition on, engine not running.
5. With a scan tool, read AAT voltage.
  Is the voltage below 1.0 volt with the jumper wire installed?
  
  Yes
  - Replace the AAT Sensor.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 3
(G31) AAT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
1. Turn the ignition off.
  NOTE: Remove the jumper wire before continuing.
2. Disconnect the C2 TIPM harness connectors.
3. Ignition on, engine not running.
4. Measure the voltage on the (G31) AAT Signal circuit in the AAT Sensor harness connector.
  Is voltage present?
  
  Yes
  - Repair the short to battery voltage in the (G31) AAT Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Go to step 4
(G31) AAT SIGNAL CIRCUIT OPEN
1. Turn the ignition off.
2. Measure the resistance of the (G31) AAT Signal circuit between he AAT Sensor harness connector and C4 TIPM harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 5
  No
  - Repair the open in the (G31) AAT Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
(G931) SENSOR GROUND CIRCUIT OPEN
1. Measure the resistance of the (G931) Sensor Ground circuit between the AAT Sensor harness connector and the C2 TIPM harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go to step 6
  No
  - Repair the open in the (G931) Sensor Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
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 POWERTRAIN VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .
  No
  - Replace and program the Totally Integrated Power Module in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure .