Contents Wiring diagrams Section: Charging System All sections

Charging System: Diagnosis GMC Envoy I

Charging System ~194 words

TROUBLE SHOOTING

Note. For information not covered in this article, see the TROUBLE SHOOTING - BASIC PROCEDURES article in the GENERAL INFORMATION section.

  1. Turn ignition to start. If engine cranks, go to next step. If starter solenoid does not click or starter solenoid clicks, but engine does not crank, diagnose starter. See STARTER article.
  2. Start engine. If charging system and indicator light are operating properly, check is complete. If battery is undercharged or overcharged, go to «BATTERY UNDERCHARGED OR OVERCHARGED»(ref-34059-S41303626972001100200000) under ON-VEHICLE TESTING. If charge indicator is always on, see procedures in «CHARGE INDICATOR LIGHT ALWAYS ON»(ref-34059-S05674652332001100200000) under ON-VEHICLE TESTING. If indicator is inoperative, go to «CHARGE INDICATOR LIGHT NEVER ON»(ref-34059-S18106527622001100200000) under ON-VEHICLE TESTING.

ON-VEHICLE TESTING

CAUTIONWhen battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION section before disconnecting battery.

Note. Before making electrical checks, visually inspect all terminals for clean, tight connections. Ensure all charging system related fuses are okay. Check generator mounting bolts and drive belt tension. Ensure battery is in good condition prior to testing charging system.

Note. Connector Test Adapter Kit (J-35616-A) must be used whenever a test procedure requires checking or probing terminal. Manufacturer recommends using CS Electronic Generator Tester (J41450-B) to test charging system. Follow instructions provided with tester.