Diagnostic Test

CHECK FOR ACTIVE DTCS
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. Check for all BCM configuration, CAN C hardware electrical, VIN Missing/Mismatch, Battery or Ignition related DTCs before proceeding.
  Are there any related DTCs active?
  
  Yes
  - Repair the DTC(s) in accordance with Service Information.
  No
  - Go To 2
CHECK FOR AN ACTIVE DTC IN THE RF HUB
1. With the scan tool, read RF Hub DTCs
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .
VERIFY THE ESM IS ACTIVE ON THE BUS
1. With the scan tool, view all modules.
2. Verify the ESM is active on the bus.
  Is the ESM active on the bus?
  
  Yes
  - Go To 4
  No
  - Perform the NO RESPONSE FROM ESM diagnostic procedure. Refer to the appropriate diagnostic information .
CHECK ALL MODULES FOR COMMUNICATION DTCS
1. With the scan tool, view all modules.
  Is there more than one module with communication DTCs logged against the ESM?
  
  Yes
  - Replace the ESM module in accordance with the Service Information. Refer to the appropriate service information .
  No
  - Go To 5
ERASE THE DTC
1. With the scan tool erase DTCs.
2. Turn the ignition off.
3. Turn the ignition on.
4. With the scan tool, read RF Hub DTCs
  Is this DTC active?
  
  Yes
  - Replace the RF Hub Module in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - Perform the RADIO FREQUENCY HUB VERIFICATION TEST. Refer to RADIO FREQUENCY HUB (RF HUB) VERIFICATION TEST .
  No
  - Perform the Stored Lost Communication DTC diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .