Pre-Diagnostic Check Out

PRE-DIAGNOSTIC CHECK OUT

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. 45RFE/545RFE - Pre-Diagnostic Troubleshooting Procedure .

For a complete wiring diagram Refer to Diagrams/Electrical.


Diagnostic Test


1. PRE-DIAGNOSTIC CHECK OUT

NOTE: Low fluid level can be the cause of many transmission problems. If the fluid level is low locate and repair the leak then check and adjust the fluid level.


NOTE: Always perform diagnostics with a fully charged battery to avoid false symptoms.

With the scan tool, read the engine DTC's. Check and repair all Engine DTC's prior to performing Transmission symptom diagnostics.
With the scan tool, read Transmission DTC's. Record all DTC's and 1 Trip Failures.

NOTE: Diagnose 1 Trip Failures as a fully matured DTC.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Repair as necessary.
Perform the Shift Lever Position Test. If the test does not pass, refer to DTC test for P0706 Check Shifter Signal.P0706
For Gear Ratio DTC's, check and record all CVI's.
Most DTC's set on start up but some must be set by driving the vehicle to ensure that all diagnostic monitors have run.

NOTE: Verify flash level of Powertrain Controller. Some problems are corrected by software upgrades to the Transmission and Engine Systems.


NOTE: Due to the integration of the Powertrain and Transmission control modules - if a controller flash is performed it is necessary to perform Quick Learn and the Drive Learn procedures with the scan tool. Failure to do so may result in shift quality complaints.


NOTE: Check for applicable Service Bulletins that may apply.

Were any repairs made that fixed the customer's complaint?

Yes


- Testing complete.


No


- Refer to the diagnostic test procedure related to the DTC.