Symptoms - Engine Electrical

Symptoms - Starting and charging

Important: The following steps must be completed before using the symptom tables.

* Perform the Diagnostic System Check - Vehicle, before using the Symptom Tables in order to verify that all of the following are true:

- There are no DTCs set.
- The control modules can communicate via the serial data link. Initial Inspection and Diagnostic Overview

* Review the system operation in order to familiarize yourself with the system functions. Refer to one of the following system operations:

- Battery Description and Operation
- Charging System Description and Operation (Generator/Battery Control Module) Charging System Description and Operation (W/O Generator/Battery Control Module)
- Electrical Power Management Description and Operation
- Starting System Description and Operation

Visual/Physical Inspection

* Inspect for aftermarket devices which could affect the operation of the Starting and Charging Systems. Refer to Checking Aftermarket Accessories. Component Tests and General Diagnostics
* Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

* Battery Inspection/Test (Non-HP2) Battery Inspection/Test (HP2)
* Battery Electrical Drain/Parasitic Load Test (w/BCM)
* Battery Common Causes of Failure
* Charging System Test (w Generator/Battery Control Module) Charging System Test (w/o Generator/Battery Control Module)
* Charge Indicator Always On
* Charge Indicator Inoperative
* Generator Noise Diagnosis
* Starter Solenoid Does Not Click (w/Allison) Starter Solenoid Does Not Click (w/o Allison)
* Starter Solenoid Clicks, Engine Does Not Crank
* Engine Cranks Slowly
* Starter Motor Noise Diagnosis