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ATECH 821FJ Service Manual

Lighting system trainer
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Model 821FJ
Lighting System Trainer
Supplement Service Manual
Information
2003 Chevrolet Impala
VIN W
Published by ATech Training, Inc.
12290 Chandler Drive
Walton, KY 41094 USA
Phone: (859) 485-7299 Fax: (859) 485-7299
Email:
sales@atechtraining.com
Website:
www.atechtraining.com
Copyright 2009, ATech Training, Inc.
All Service Manual Information © General Motors Corporation

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Summary of Contents for ATECH 821FJ

  • Page 1 Model 821FJ Lighting System Trainer Supplement Service Manual Information 2003 Chevrolet Impala VIN W Published by ATech Training, Inc. 12290 Chandler Drive Walton, KY 41094 USA Phone: (859) 485-7299 Fax: (859) 485-7299 Email: sales@atechtraining.com Website: www.atechtraining.com Copyright 2009, ATech Training, Inc.

  • Page 2: Body And Accessories

    Body and Accessories Lighting Systems Schematic and Routing Diagrams Headlights/Daytime Running Lights (DRL) Schematics DRL Relay, Headlamps, and Power [w/o 6J7] DRL Relay, Headlamps, and Power [w/ 6J7] Indicators, and Lamp Control Interior Lights Dimming Schematics Dimming Control, and Steering Wheel Controls Class 2 Dimming Description and Operation Exterior Lighting Systems Description and Operation...

  • Page 9: Exterior Lamps

    Exterior Lighting Systems Description and Operation Exterior Lamps The exterior lighting consists of the following lamps: • The Headlamps • The Daytime Running Lamps (DRL) • The Fog Lamps • The Park, Tail, Licence and Marker Lamps • The Turn Signal Lamps •...

  • Page 10: Fog Lamps

    With the headlamps in the low beam position, you may momentarily turn ON or flash the high beams using the dimmer switch handle. When you pull the headlamp dimmer switch handle toward you, the flash-to-pass (FTP) switch closes, grounding the high beam circuit at G201. Both high beams will remain ON until you release the switch handle.

  • Page 11: Turn Signal Lamps

    Park, Tail, Marker Lamps, and License The park, tail and marker lamps, including the license lamps, turn on when the headlamp switch is placed in either the PARK or the HEAD position, or anytime the headlamps are requested. The RT I/P #1 fuse in the RH I/P fuse block supplies battery positive voltage to both the park lamp relay switch contacts and to the park lamp relay coil circuit.
  • Page 12 supplied to the left and right stop lamp assemblies and to the center high mounted stop lamp (CHMSL). The left and right stop lamps along with the CHMSL are grounded at G302. Rear Window Panel Lamps (SEO, RPO 6J6) The rear window panel lamp system on Special Equipment Option (SEO) vehicles, consists of two red lensed lamps that function as auxiliary turn signal and stop lamps.
  • Page 13 HIGHBEAM OUT The IPC illuminates the HIGHBEAM OUT indicator in the message center when the body control module (BCM) detects an open in one of the high beam lamp circuits. The IPC receives a class 2 message from the BCM requesting illumination. The HIGHBEAM OUT indicator illuminates for 60 seconds when the condition is present.

  • Page 14: Interior Lamps

    Interior Lighting Systems Description and Operation Interior Lamps The interior lamps consists of two groups, lamps that can not be dimmed and lamps that can be dimmed. This first group consists of lamps that may not be dimmed. This Includes those lamps that may be manually turned on by placing the interior lamp switch to the DOME position, or by opening a door or a compartment: •...
  • Page 15 The BCM activates the interior lighting output 15 seconds after receiving the class 2 message "Airbags Deployed" from the sensing and diagnostic module (SDM). The interior lamps remain activated for 25 minutes. Auxiliary Dome Lamp (SEO, RPO 6C7) An auxiliary dome lamp on special equipment option (SEO) vehicles is mounted to the headliner near the windshield.
  • Page 16 Interior Lamps Dimming The second group of interior lighting includes lamps which may be dimmed. This group uses a combination of class 2 controlled illumination and incandescent lamps: • Ashtray lamp • Door switches and window switches • Fog lamp switch •...
  • Page 20 Content Theft Deterrent (CTD) Description and Operation The CTD system (when armed) is designed to deter vehicle content theft by pulsing the horns and exterior lamps for approximately 2 minutes when an unauthorized vehicle entry is detected. However, the CTD system does not affect engine starting.
  • Page 21 • To disarm the CTD system in standby mode (SECURITY indicator flashing and door(s) open), perform one of the following: - Press either power door unlock switch. - Use a key to unlock either front door. - Press the UNLOCK button on the keyless entry transmitter. - Insert a valid key into the ignition and switch to the ON position.
  • Page 22 no longer active. If no new intrusions are detected after the time-out, the horn is not active.The system must be disarmed or the intrusion condition removed after the time-out for the system to exit alarm mode. Front Door Lock Cylinder Switches The door lock cylinder switches located in the driver and front passenger doors are a discrete input to the BCM.
  • Page 23 Door Ajar Indicator Description and Operation Door Ajar Indicator The IPC illuminates the DOOR AJAR indicator in the message center when the body control module (BCM) detects that the driver or passenger door is open. The IPC receives a class 2 message from the BCM requesting illumination.

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