Objectives 652 Body Electrical Diagnosis 5. Given 8 different customer concerns (4 with full class participation and 4 in teams of two), all of the appropriate tools and equipment, a vehicle(s) with select “faults” installed, and access to the vehicle’s EWD, the technician will be able to demonstrate his ability to apply the Six-step Diagnostic Process to: • Verify the customer concern by:
– Duplicating the problem the Customer is describing – Identifying what circuit is involved in the concern – Locating information related to what is normal operation and customized settings for that circuit – Determining if it is a problem, a normal operating condition or a customized setting – Identifying the conditions under which the problem occurs • Determine the related symptoms by: – Identifying how much of the circuit is affected – Identifying related circuits and determining if problems exist in those circuits – Determining if DTCs are present • Analyze the problem by:
– Defining exactly which components/circuits are affected based on both the customer's concern and any related symptoms – Defining what kind of problem to look for (open, short-to-ground, high resistance, feedback) – Identifying when the problem occurs (what operating conditions: key ON, driver's door open, etc.) – Identifying on the wiring diagram where the problem could possibly be located – Determining what tests to perform first, what tools to use, and what results to expect – Determining the easiest place to begin making the checks (split half method) • Isolate the problem by:
– Performing initial tests – Determining the logical place to test next and predicting the expected results for a normally operating circuit • Identify and describe the correct repair for the problem, such as: – Replacing a wire harness – Performing a proper repair to wiring, connections, connectors, or terminals – Replacing a component Technical Training e