6 Speed - Automatic Transmission

Diagnostic Flow Chart

Special Tool(s):

Prior to carrying out the flow test, the following items should be checked:
^ Know and understand the customer concerns.
^ Check the fluid level and condition.
^ Verify the concern by operating the vehicle.
^ Check for non-factory-installed items and verify correct installation.
^ Check the selector lever linkage adjustments.
^ Check TSBs for vehicle concerns.
^ Carry out Self Tests, both key ON/Engine OFF (KOEO) and key ON/Engine running (KOER).
^ Record all codes.
^ Verify that the vehicle transmission control module (TCM) is at the latest calibration release level.

Diagnostic Flow Chart (Part 1):

Diagnostic Flow Chart (Part 2):