Symptoms - Engine Electrical: Notes

• In order to verify that all of the following conditions are fulfilled before using the symptom lists perform the Diagnostic System Check: Diagnostic System Check - Vehicle
  • Verify that no DTCs are set.
  • The control modules can communicate via the serial data link.
• Review the system description and operation in order to familiarize yourself with the system functions.

  For an overview of the component/system, Refer to:

  • Battery Description and Operation 
  • Charging System Description and Operation 
  • Electrical Power Management Description and Operation 
  • Starting System Description and Operation 
  • Load Shed System Description and Operation 

Visual/Physical Inspection

• Inspect for aftermarket devices which may affect the operation of the system. Refer to: Checking Aftermarket Accessories .
• Inspect the easily accessible or visible system components, for obvious damage or conditions, which may 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 .