45RFE/545RFE PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For a complete wiring diagram Refer to Section 8W.

Perform the following before attempting any diagnostic procedures:

With the scan tool check pinion factor (if equipped) for proper tire identification and program or reprogram if necessary.
Check the transmission fluid level. If the fluid level is low, locate and repair any leaks and fill the transmission to the proper level. Refer to the appropriate Service Information for procedures. Many transmission symptoms can be caused by a low fluid level.
Check the battery. To avoid false diagnosis, testing should only be performed with the battery fully charged.
With the scan tool, read Engine (PCM) DTCs. If DTCs are present, refer to the Driveability Category and perform to the appropriate diagnostic procedure(s) before proceeding.
With the scan tool, read Transmission (TCM) DTCs. Record all Stored, Active, and Pending DTC information. Diagnose any Pending DTC as a matured DTC.
With the scan tool, read and record the DTC EVENT DATA. Use this data to identify the conditions in which the DTC was set.
Performing a Battery Disconnect will clear all DTC EVENT DATA and reset all learned Transmission values to the default values, which may temporarily result in erratic shift schedules.
With the scan tool, perform the Shift Lever Position Test. If the test does not pass, refer to the diagnostic procedure for P0706 Transmission Range Sensor Rationality.
For Gear Ratio Error DTCs, use the scan tool to view CVI Monitor data. Read and record the Clutch Volume Index information.
Use the wiring diagram as a guide. Inspect the wiring and connectors related to this circuit. Repair as necessary.
Refer to the When Monitored and Set Conditions for this DTC. DTCs can set at ignition on, at start up, after driving under specific conditions and after diagnostic monitors have been run.
Refer to applicable Technical Service Bulletins (TSBs) for controller software update information. Some conditions can be corrected by upgrading the Engine (PCM) or Transmission (TCM) controller software.
Refer to any Service Information Tune Ups or Technical Service Bulletins that apply.

Were there any repairs made that fixed the vehicle?

Yes

Testing complete.

Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 45RFE/545RFE - STANDARD PROCEDURE)

Refer to the Transmission category and perform the appropriate diagnostic procedure(s).