Diagnostic Starting Point - Automatic Transmission Shift Lock Control

Begin the system diagnosis by reviewing the Automatic Transmission Shift Lock Control Description and Operation (with Allison Transmission)  or Automatic Transmission Shift Lock Control Description and Operation (without Allison Transmission) . Reviewing the description and operation information will help you determine the correct symptom diagnostic procedure when a malfunction exists. Reviewing the description and operation information will also help you determine if the condition described by the customer is normal operation.

Refer to Symptoms - Automatic Transmission Shift Lock Control  in order to identify the correct procedure for diagnosing the system and where the procedure is located.