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Express 1500 RWD V8-5.3L VIN T (2004)

Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Accessory Delay Module > Component Information > Testing and Inspection > Initial Inspection and Diagnostic Overview

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Accessory Delay Module: Initial Inspection and Diagnostic Overview

Diagnostic Starting Point

DIAGNOSTIC STARTING POINT

Review the Retained Accessory Power (RAP) Description and Operation before you begin the system diagnosis. Reviewing the Description and
Operation
information will help you determine if the condition described by the customer is normal operation.

Begin the system diagnosis with the Diagnostic System Check - Accessory Delay Module. The Diagnostic System Check will provide the following
information:

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The identification of the control modules which command the system

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The ability of the control modules to communicate through the serial data circuit

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The identification of any stored diagnostic trouble codes (DTCs) and their status

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

TEST DESCRIPTION

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Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Accessory Delay Module > Component Information > Testing and Inspection > Initial Inspection and Diagnostic Overview

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