Diagnostic Test

CHECK FOR OTHER TCM DTCS
1. With the scan tool, read TCM DTCs and record on the repair order.
  Are any other TCM DTCs set?
  
  Yes
  - Repair other TCM DTCs. Refer to the TRANSMISSION CONTROL MODULE (TCM) - DIAGNOSTIC CODE INDEX article .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948RE 9HP48 .
  No
  - Go To 2
CHECK FOR PCM DTCS
1. With the scan tool, read PCM DTCs.
  Are any PCM DTCs set?
  
  Yes
  - Repair PCM DTCs. Refer to the DTC INDEX article .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948RE 9HP48 .
  No
  
  NOTE:
  If this Electronic Control Unit (ECU) is being replaced with a new unit, a diagnostic scan tool MUST be used to align the PROXI configuration data into the new ECU. Follow the routine outlined in the diagnostic scan tool for PROXI Configuration Alignment under Body Control Module (BCM) Miscellaneous Functions menu.
  - Using the schematics as a guide, check the Transmission Control Module (TCM) terminals and connectors for corrosion, damage or pushed out terminals. Pay particular attention to the power and ground circuits. If no problems are found, replace the TCM and perform programming and PROXI Configuration Alignment procedures. Refer to MODULE, TRANSMISSION CONTROL, REMOVAL .
  - Perform the TRANSMISSION VERIFICATION TEST. Refer to TRANSMISSION VERIFICATION TEST - 948RE 9HP48 .