Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Make sure the battery is fully charged.
1. Perform any Service Bulletins that may apply.
2. Turn the ignition on.
3. With the scan tool, read Active Aerodynamics Module Left (AAML) DTCs and record on the repair order.
4. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
5. With the scan tool, erase AAML DTCs.
6. Cycle the ignition from off to on.
7. With the scan tool, read AAML DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform AAM VERIFICATION TEST. Refer to AAM VERIFICATION TEST .
CHECK FOR POWERTRAIN CONTROL (PCM) DTCS
1. Refer to the recorded DTCs.
  Are there any PCM DTCs active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DTC INDEX .
  No
  - Go To 3
CHECK THE POWER CIRCUITS FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the AAML harness connector.
3. Turn the ignition on.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
4. With a 12-volt test light connected to ground, check the (A901) Fused B+ and (F741) Fused Ignition Switch Output circuits at the AAML harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the Power circuits for an open or high resistance.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
CHECK THE GROUND CIRCUITS FOR AN OPEN OR HIGH RESISTANCE
1. Turn the ignition off.
2. With a test light connected to B+ check the (Z103) Ground circuits at the AAML harness connector.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5
  No
  - Repair the Ground circuits for an open or high resistance.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Turn the ignition off.
2. Disconnect the AAML harness connector.
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.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
6. Connect the AAML harness connector. Be certain that the harness connector is fully seated and the connector lock is fully engaged.
7. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Connect the 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. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
11. With the scan tool, read AAML DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Active Aerodynamics Module Left (AAML) in accordance with the Service Information.
  - Perform AAM VERIFICATION TEST. Refer to AAM VERIFICATION TEST .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform AAM VERIFICATION TEST. Refer to AAM VERIFICATION TEST .