Initial Inspection and Diagnostic Overview

PRE-DIAGNOSTIC CHECK OUT

For a complete wiring diagram Consult Diagrams/Electrical.

Diagnostic Test

1. PRE-DIAGNOSTIC CHECK OUT
1. Check the transmission fluid level. If the fluid level is low, locate and repair any leaks and fill the transmission to the proper level. Many transmission symptoms can be caused by a low fluid level. Fluid Level Check - 42RLE
2. Check the battery. To avoid false diagnosis, testing should only be performed with the battery fully charged.
3. With the scan tool, read Engine (PCM) DTCs. If DTCs are present, perform the appropriate diagnostic procedure(s) before proceeding.
4. With the scan tool, read Transmission (TCM) DTCs. Record all Stored, Active, and Pending DTC information. Diagnose any Pending DTC as a matured DTC.
5. With the scan tool, read Event Data. Use this data to identify the conditions in which the DTC was set.
6. Performing a Battery Disconnect will clear all Event Data and reset all learned Transmission values to the default values, which may temporarily result in erratic shift schedules.
7. 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. P0706
8. For Gear Ratio Error DTCs, use the scan tool to view CVI Monitor data. Read and record the Clutch Volume Index information.
9. Use the wiring diagram as a guide. Inspect the wiring and connectors related to this circuit. Repair as necessary.
10. 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.
11. 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.
12. Refer to any Technical Service Bulletins that apply to this symptom.
Were there any repairs made that fixed the vehicle?

Yes

- Testing complete.
- Perform 42RLE VERIFICATION TEST Transmission Verification Test

No

- Refer to the appropriate diagnostic procedure(s).