Diagnostic Test

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR DTC TO RETURN
1. With the scan tool, read DTCs in all Electronic Control Units (ECU's) and record on the repair order.
2. With the scan tool, run a Vehicle Scan Report, or record the Environmental Data related to the DTCs.
3. NOTE: A front door must remain open whenever checking or erasing Radio DTCs.
4. With the scan tool, perform an ECU reset to the Radio and BCM, and then erase DTCs.
5. Turn the ignition off for a minimum of 10.0 seconds.
6. Turn the ignition on.
7. Turn the Radio on and set the volume to 25.
8. With the scan tool, read the active Radio DTCs.
  NOTE:
  A front door must remain open whenever checking or erasing Radio DTCs.
  
  Did the DTC return?
  
  Yes
  - Go To Next Step.
  No
  - Perform the appropriate INTERMITTENT CONDITION diagnostic procedure. Refer to: TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE CABIN EQUALIZATION CURVE NUMBER
1. With the scan tool in the BCM ECU Details Tab, Configuration button, record the Cabin Equalization Curve number.
2. With the scan tool in the Radio ECU Details Tab, Configuration button, record the True value.
  NOTE:
  The Cabin EQ Curve value found in the BCM should match the True value found in the Radio.
  
  Do the Cabin EQ settings match one another?
  
  Yes
  - Replace the Radio in accordance to the service information. Refer to: RADIO, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .
  No
  - Go To Next Step.
VERIFY COMMUNICATION WITH BCM
1. With the scan tool, read the active modules on the BUS.
  Does the scan tool show the BCM active on the BUS?
  
  Yes
  - Go To Next Step.
  No
  - Perform the No Response From ECU diagnostic procedure. Refer to: NO RESPONSE FROM ECU .
CHECK THE BCM FOR ACTIVE DTCs
1. With the scan tool, perform an ECU reset to the Radio and BCM, and then erase DTCs.
2. Turn the ignition off for a minimum of 10.0 seconds.
3. Turn the ignition on.
4. With the scan tool, read BCM DTCs and record them on the repair order.
  Are any active DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure. Refer to: BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to: BODY VERIFICATION TEST .