Body Control Computer

• Identification
• Description & Operation
  • Notes
  • Body Control Computer
  • CCD Bus System
  • Mechanical Instrument Cluster (Mic)
  • Overhead Travel Information System (OTIS)
  • Vehicle Theft Security System (VTSS)
    • Notes
    • Initialization & Verification
    • Manual Override Mode & Tamper Alert Mode
• Self-Diagnostic System
  • General Precaution
  • Pretest Inspection
  • Diagnostic Procedure
  • Generic Scan Tool
  • DRB Scan Tool
  • Connector Identification
• Testing
  • Body Control Computer Tests
  • Symptom Id Test 1A - Identifying Vehicle Equipment & System Problems
  • Symptom Id Test 1B - Identifying Diagnostic Trouble Codes
  • Test 29A - Diagnosing Chime System
  • Test 30A - Chime Inoperative At All Times
  • Test 31A - Chime Inoperative With External Lamps On
  • Test 32A - Chime Inoperative With Seat Belt Unfastened
  • Test 33A - Chime Inoperative With Key In Ignition
  • Test 34A - Diagnosing Courtesy Lamp Circuit
  • Test 35A - Courtesy Lamp System & Power Supply
  • Test 35B - Courtesy Lamp Output Failure
  • Test 36A - One Inoperative Courtesy Lamp
  • Test 37A - Courtesy Lamps On At All Times
  • Test 38A - Open Courtesy Lamp Switch Circuit
  • Test 38B - Shorted Courtesy Lamp Switch Circuit
  • Test 39A - Open Left Front Door Ajar Circuit
  • Test 39B - Shorted Left Front Door Ajar Circuit
  • Test 40A - Right Front Door Ajar Circuit
  • Test 40B - Shorted Door Ajar Circuits
  • Test 41A - Left Rear Door Ajar Circuit
  • Test 42A - Right Rear Door Ajar Circuit
  • Test 43A - Identifying Vehicle Headlight System
  • Test 44A - Diagnosing Headlight Time Delay System Problems (Without Auto Headlights)
  • Test 45A - Headlights Will Not Turn Off
  • Test 46A - Headlight Time Delay Will Not Turn On
  • Test 46B - Headlight Time Delay Will Not Turn On
  • Test 47A - Identifying Headlight System Problems (With Auto Headlight System)
  • Test 48A - Headlight & Parking Lamps Inoperative In Auto Mode
  • Test 48B - Auto Headlight Sun Sensor Input Circuit
  • Test 49A - Headlights Inoperative In Auto Mode
  • Test 50A - Parking Lamps Inoperative In Auto Mode
  • Test 51A - Headlights & Parking Lamps Do Not Turn Off
  • Test 52A - Parking Lamps Will Not Turn Off
  • Test 53A - Inoperative Illuminated Entry
  • Test 54A - Identifying Instrument Cluster Problems
  • Test 55A - Instrument Cluster Gauge Problem
  • Test 56A - All Gauges Inoperative
  • Test 56B - All Gauges Inoperative
  • Test 57A - Instrument Cluster Sense Circuits
  • Test 57B - Instrument Cluster Sense Circuits
  • Test 58A - Identifying Warning Lamp Problems
  • Test 58B - Instrument Cluster Printed Circuit Board
  • Test 59A - Communication With Transmission Control Module
  • Test 60A - Diagnosing Instrument Cluster Illumination Problem
  • Test 60B - Parking Lamp Switch Output Circuit Short To Ground
  • Test 60C - Parking Lamp Switch Output Circuit Short To Battery
  • Test 61A - Parking Lamp Switch Power Supply
  • Test 62A - Open Panel Lamps Driver Circuit
  • Test 63A - Diagnosing Parking Lamp Switch
  • Test 64A - Parking Lamp Switch Output Circuit Short To Ground
  • Test 65A - Faulty Temperature Gauge/Lamp
  • Test 66A - Faulty Gauge
  • Test 67A - Fuel Gauge/Lamp Operation Full At All Times
  • Test 67B - Inaccurate Fuel Gauge Operation
  • Test 68A - Fuel Gauge/Lamp Empty At All Times
  • Test 68B - Fuel Gauge/Lamp Empty At All Times
  • Test 68C - Fuel Gauge/Lamp Operation
  • Test 68D - Fuel Level Voltage Below 1 Volt
  • Test 69A - Faulty Speedometer
  • Test 70A - Oil Pressure Switch Sense Circuit Short To Ground
  • Test 70B - Open Oil Pressure Switch Sense Circuit
  • Test 71A - Seat Belt Switch Circuit Short To Ground
  • Test 72A - Open Seat Belt Switch Circuit
  • Test 73A - Diagnosing Parking Brake Warning Lamp
  • Test 73B - Open Brake Fluid Level Switch Circuit
  • Test 73C - Open Parking Brake Switch Circuit
  • Test 73D - Open Parking Brake Switch Circuit
  • Test 73E - Shorted Parking Brake Circuit
  • Test 74A - Gauges Do Not Go To Zero With Key Off
  • Test 75A - Identifying Key-In Lamp Problems
  • Test 76A - Inoperative Key-In Lamp
  • Test 77A - Key-In Lamp On Constantly
  • Test 78A - Diagnosing Message Center
  • Test 79A - Low Washer Fluid Lamp Circuit
  • Test 79B - Inoperative Low Washer Fluid Lamp
  • Test 80A - Door Ajar Lamp Circuit
  • Test 81A - Diagnosing Overhead Travel Information System (OTIS)
  • Test 82A - Blank Screen Or No Response Condition On OTIS
  • Test 83A - OTIS Ambient Temperature Sensor
  • Test 84A - OTIS Ambient Temperature Sensor
  • Test 84B - Incorrect Ambient Temperature Reading
  • Test 85A - Testing OTIS Mileage & Distance Functions
  • Test 86A - Testing OTIS Switches
  • Test 87A - Identifying Door Lock Problem
  • Test 88A - All Doors Fail To Lock & Unlock From Any Switch
  • Test 88B - All Doors Fail To Lock & Unlock From Any Switch
  • Test 88C - Shorted Switch Circuit
  • Test 89A - One Door Fails To Lock & Unlock From Any Switch
  • Test 90A - All Doors Fail To Lock & Unlock From One Switch
  • Test 91A - All Doors Fail To Lock From Any Switch
  • Test 92A - All Doors Fail To Unlock From Any Switch
  • Test 93A - Repairing Inoperative Door Lock Inhibit Switch
  • Test 94A - Diagnosing Automatic Speed Sensitive Door Locks
  • Test 95A - Identifying Power Door Lock & Remote Keyless Entry Problem
  • Test 96A - Left Front Door Fails To Lock & Unlock From Any Switch
  • Test 97A - Left Front Door Lock Problem
  • Test 98A - Left Front Door Unlock Problem With Remote Keyless Entry (RKE)
  • Test 99A - All Doors (Except Left Front) Fail To Lock & Unlock
  • Test 100A - All Doors (Except Left Front) Fail To Lock
  • Test 101A - All Doors (Except Left Front) Fail To Unlock
  • Test 102A - Remote Keyless Entry Problem
  • Test 102B - Problem With Remote Keyless Entry
  • Test 102D - Programming RKE Transmitter
  • Test 102E - Remote Keyless Entry Problem
  • Test 102F - Inoperative RKE Horn Chirp
  • Test 102G - Canceling RKE Horn Chirp
  • Test 102H - Changing Rear Release To Single Button Depress
  • Test 103A - Diagnosing Wiper System Problems
  • Test 104A - Wiper Switch, Controller & Power Supply
  • Test 104B - Wiper Switch Mode Sense Circuit
  • Test 104C - Wiper Motor Output Circuit Short
  • Test 104D - On/Off (Intermittent) Wiper Motor Relay & Control Circuit
  • Test 104E - Inoperative Wiper Motor Low Speed
  • Test 104F - Wiper Switch Power Supply
  • Test 104G - Wiper Switch Power Supply Short To Ground
  • Test 105A - Wiper Motor High Speed Operation
  • Test 106A - Wiper Motor Low Speed Operation
  • Test 107A - Wiper Motor Intermittent Speed Operation
  • Test 108A - Open Park Switch Sense Circuit
  • Test 109A - Washer Pump Operation
  • Test 110A - Wipers Operate In High Speed Only
  • Test 111A - Wipers Operate Constantly With Ignition On
  • Test 112A - Testing Fused Ignition Switch Output To Body Control Module (BCM)
  • Test 113A - Body Control Module (BCM) No Response Condition
  • Test 114A - Powertrain Control Module No Response Condition
  • Test 115A - Repairing Scan Tool Blank Screen
  • Test 141A - Identifying Vehicle Theft Security System (VTSS) Problems
  • Test 141B - Disarming VTSS System
  • Test 142A - Repairing No Response Condition
  • Test 143A - Repairing Ignition Circuit
  • Test 144A - Repairing Horn Circuit
  • Test 144B - Repairing Battery Feed Circuit
  • Test 144C - Repairing Trunk Key Cylinder Switch Sense Circuit
  • Test 145A - Repairing VTSS Indicator Light
  • Test 145B - Repairing VTSS Indicator Light
  • Test 146A - Repairing Headlight Circuit
  • Test 146B - Repairing Parking Light Circuit
  • Test 146C - Repairing Key In Ignition Circuit
  • Test 147A - Repairing Left Front Door Ajar Switch Circuit
  • Test 148A - Repairing Right Front Door Ajar Switch Circuit
  • Test 149A - Repairing Right Rear Door Ajar Switch Circuit
  • Test 150A - Repairing Left Rear Door Ajar Switch Circuit
  • Test 151A - Door Lock Switch (Lock) Output Circuit
  • Test 152A - Door Lock Switch (Unlock) Output Circuit
  • Test 153A - Repairing VTSS Disarm Circuit (Left Door)
  • Test 153B - Repairing VTSS Disarm Circuit
  • Test 154A - Repairing VTSS Disarm Circuit (Right Door)
  • Test 155A - No Response From Pcm
  • Test 156A - Repairing RKE Arm Function
  • Test 156B - Repairing RKE Disarm Function
  • Test VER-1 - Verification Procedure
  • Test VER-3A - Verification Procedure
  • Vehicle Communications Tests
    • Test 132A - Bus Fault Messages
    • Test 133A - Bus Short To Battery
    • Test 133B - Bus Short To Battery
    • Test 133C - Bus Short To Battery
    • Test 133D - Bus Short To Battery
    • Test 133E - Bus Short To Battery
    • Test 133F - Bus Short To Battery
    • Test 133G - Bus Short To Battery
    • Test 134A - Bus Short To 5 Volts
    • Test 134B - Bus Short To 5 Volts
    • Test 134C - Bus Short To 5 Volts
    • Test 135A - Bus Short To Ground
    • Test 136A - Bus (+) & Bus (-) Shorted Together
    • Test 137A - No Termination
    • Test 138A - Bus Bias Level Or Bus (+/-) Open
    • Test 139A - No Bus Bias
    • Test 140A - Not Receiving Bus Messages Correctly
• Wiring Diagrams