Impala V6-3.8L VIN K (2004)
Accessory Delay Module: Initial Inspection and Diagnostic Overview
Diagnostic Starting Point
DIAGNOSTIC STARTING POINT - ACCESSORY DELAY MODULE
Begin the system diagnosis with a Diagnostic System Check - Accessory Delay Module. The use of the Diagnostic System Check will identify the correct
procedure for diagnosing the system and where the procedure is located.
Diagnostic System Check
DIAGNOSTIC SYSTEM CHECK - ACCESSORY DELAY MODULE
TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data
circuit. The specified procedure will determine the particular condition.
4. The presence of DTCs which begin with U indicate some other module is not communicating. The specified procedure will compile all the
available information before tests are performed.
TEST
Steps 1 - 3