Body Diagnostics
- Introduction
- Identification Of System
- System Description & Functional Operation
- Notes
- Airbag System
- Audio System
- Central Timer Module
- Chime System
- Compass Mini-Trip Computer (CMTC)
- Notes
- Vehicle Information Display
- Us/M Button
- Step Button
- Reset Button
- Compass/Temperature (C/T) Button
- Traveler Display Functions
- Compass Orientation
- Setting Magnetic Zone Variance
- Compass Calibration
- Self-Check Diagnostics
- Ambient Temperature Sensor
- Ambient Temperature Sensor Fault Codes
- Ambient Temperature Sensor Test
- Door Ajar System
- Electro/Mechanical Instrument Cluster (EMIC)
- Enhanced Accident Response (HIGHLINE CTM Only)
- Exterior Lighting
- Heating & A/C System
- Interior Lighting
- Power Door Locks/Remote Keyless Entry
- Vehicle Communication
- Vehicle Theft Security System
- Windshield Wiper System
- Using The DRBIII(R)
- DRBIII Error Messages And Blank Screen
- Disclaimers, Safety, Warnings
- Required Tools And Equipment
- Glossary Of Terms
- Diagnostic Information & Procedures
- Airbag
- Symptom List: Accelerometer 1, Accelerometer 2, Internal 1, Output Driver 1, Output Driver 2, SAFING Sensor, Stored Energy Firing 1, Stored Energy Firing 2, Stored Energy Logic
- Symptom: Airbag Warning Indicator Open, Airbag Warning Indicator Short
- Symptom: Cluster Message Mismatch
- Symptom: Configuration Error
- Symptom: Curtain Squib Circuit Open
- Symptom: Curtain Squib Circuit Short
- Symptom: Curtain Squib Short To Battery
- Symptom: Curtain Squib Short To Ground
- Symptom: Driver Seat Belt TENSIONER Circuit Open
- Symptom: Driver Seat Belt TENSIONER Circuit Short
- Symptom: Driver Seat Belt TENSIONER Short To Battery
- Symptom: Driver Seat Belt TENSIONER Short To Ground
- Symptom: Driver Squib 1 Circuit Open
- Symptom: Driver Squib 1 Circuit Short
- Symptom: Driver Squib 1 Short To Battery
- Symptom: Driver Squib 1 Short To Ground
- Symptom: Interrogate Left SIACM
- Symptom: Interrogate Right SIACM
- Symptom: Loss Of Ignition Run - Start
- Symptom: Loss Of Ignition Run Only
- Symptom: Module Not Configured For PAB Off Switch
- Symptom: Module Not Configured For SAB
- Symptom: No Cluster Message
- Symptom: No Left SIACM Message
- Symptom: No PCI Transmission
- Symptom: No Right SIACM Message
- Symptom: Passenger Seat Belt TENSIONER Circuit Open
- Symptom: Passenger Seat Belt TENSIONER Circuit Short
- Symptom: Passenger Seat Belt TENSIONER Short To Battery
- Symptom: Passenger Seat Belt TENSIONER Short To Ground
- Symptom: Passenger Squib 1 Circuit Open
- Symptom: Passenger Squib 1 Circuit Short
- Symptom: Passenger Squib 1 Short To Battery
- Symptom: Passenger Squib 1 Short To Ground
- Symptom: *Airbag Indicator On Without ACM Trouble Codes
- Audio
- Symptom: All Channels Shorted Together Or To Ground
- Symptom: All Inputs No Activity
- Symptom: All Outputs Short - Premium Audio System
- Symptom: All Outputs Short - Base Audio System
- Symptom List: Cassette Player INOP, Cd Mechanical Failure, *Am/Fm Switch Inoperative, *Any Station Preset Switch Inoperative, *Balance Inoperative, *Cd Eject Switch Inoperative, *Equalizer Inoperative, *Fader Inoperative, *Ff/RW Switch Inoperative, *Hour/Minute Switches Inoperative, *Pause/Play Switch Inoperative, *PWR Switch Inoperative, *Scan Switch Inoperative, *Seek Switch Inoperative, *Set Switch Inoperative, *Tape Eject Switch Inoperative, *Time Switch Inoperative, *Tune Switch Inoperative
- Symptom: Cd Play Failure
- Symptom: Cd Read Failure
- Symptom: Cd Temperature High
- Symptom: Front Channels Short Together Or To Ground
- Symptom: Left Front And Left Rear Channels Shorted Across
- Symptom: Left Front And Right Rear Channels Short Across
- Symptom: Left Front Channel Short Across
- Symptom: Left Front Input No Activity
- Symptom: Left Rear Channel Short Across
- Symptom: Left Rear Input No Activity
- Symptom: Low Voltage Level
- Symptom: No Antenna Connection
- Symptom: PCI Failure
- Symptom: Power Amp Shutdown - Base Audio System
- Symptom: Power Amp Shutdown - Premium Audio System
- Symptom: Rear Channels Short Together Or To Ground
- Symptom: Remote Radio Switch Circuit Open
- Symptom: Right Front And Left Rear Channels Short Across
- Symptom: Right Front And Right Rear Channels Short Across
- Symptom: Right Front Channel Short Across
- Symptom: Right Front Input No Activity
- Symptom: Right Rear Channel Short Across
- Symptom: Right Rear Input No Activity
- Symptom: Software Checksum Failure
- Symptom: *Amplifier Pretest
- Symptom: *Remote Radio Switches Inoperative (If Equipped)
- Chime
- Symptom: *Chime Inoperative At All Times
- Symptom: *Chime Inoperative With Driver Seat Belt Unfastened
- Symptom: *Chime Inoperative With Exterior Or Interior Lamps On With Driver Door Open
- Symptom: *Chime Inoperative With Key In Ignition, Driver's Door Open
- Symptom: *Chime Sounds With Driver Seat Belt Fastened
- Symptom: *Chime Sounds With Driver's Door Open, Key Removed
- Symptom: *Vehicle Speed Warning Chime Problem
- Communication
- Symptom: ACM Messages Not Received
- Symptom: Bus Shorted To Battery Bus Shorted To Ground
- Symptom: HVAC Messages Not Received
- Symptom: Internal Checksum Failure
- Symptom: Loss Of Battery #1
- Symptom: Loss Of Battery #2
- Symptom: Mic Messages Not Received
- Symptom: Pcm Messages Not Received
- Symptom: Post Failure
- Symptom: ROM Checksum Failure
- Symptom: *No Response From Airbag Control Module
- Symptom: *No Response From Amplifier
- Symptom: *No Response From Central Timer Module
- Symptom: *No Response From Controller Anti-Lock Brake
- Symptom: *No Response From HVAC
- Symptom: *No Response From Instrument Cluster
- Symptom: *No Response From Left SIACM
- Symptom: *No Response From Overhead Console
- Symptom: *No Response From Pcm (PCI Bus) - JTEC
- Symptom: *No Response From Pcm (PCI Bus) - NGC
- Symptom: *No Response From Pcm (Pcm Sci Only) - NGC
- Symptom: *No Response From Pcm (Sci Only) - JTEC
- Symptom: *No Response From Radio
- Symptom: *No Response From Right SIACM
- Symptom: *No Response From Sentry Key Immobilizer Module
- Symptom: *No Response From Transfer Case Control Module
- Symptom: *No Response From Transmission Control Module - NGC
- Symptom: *PCI Bus Communication Failure
- Compass/Mini-Trip Computer
- Symptom: Bus Messages Missing
- Symptom: CMTC Internal Failure
- Symptom: Demagnetize Compass
- Symptom: Set Compass
- Symptom List: *Average Fuel Inoperative Or Wrong, *CMTC Fails To Respond To Instrument Panel Dimming, *Distance To Empty Inoperative Or Wrong, *Elapsed Time Inoperative Or Wrong, *Switch On CMTC Inoperative, *Trip Odometer Inoperative Or Wrong
- Symptom: *CMTC Displays -40° (C Or F), 54°C (130°F), Or (- -) - JTEC
- Symptom: *CMTC Segments Fail To Illuminate
- Symptom: *CMTC Self-Check
- Symptom: *Compass/Mini-Trip Computer Inoperative
- Symptom: *Temperature Display Inaccurate Or Inoperative -JTEC
- Symptom: *Temperature Display Inaccurate Or Inoperative - NGC
- Door Ajar
- Symptom: *Driver Door Ajar Circuit Open
- Symptom: *Driver Door Ajar Circuit Shorted To Ground
- Symptom: *Left Rear Door Ajar Circuit Open
- Symptom: *Liftgate Ajar Circuit Open
- Symptom: *Liftgate Ajar Circuit Shorted To Ground
- Symptom: *Passenger Door Ajar Circuit Open
- Symptom: *Passenger Door Ajar Circuit Shorted To Ground
- Symptom: *Right Rear Door Ajar Circuit Open
- Electrically Heated System
- Exterior Lighting
- Heating & A/C
- Symptom List: A/C Switch Fault (Active), Checksum Failure (Active), Defog Switch Fault (Active), Washer Switch Fault (Active)
- Symptom List: A/C Switch Fault (Stored), Backlight Dimming RX Failure (Stored), Blend OVERCURRENT (Stored), Checksum Failure (Stored), Defog Switch Fault (Stored), Engine Gauge RX Failure (Stored), Evaporator Temperature Sensor Circuit Open (Stored), Evaporator Temperature Sensor Circuit Shorted (Stored), LOOPBACK Test Failure (Stored), Mode OVERCURRENT (Stored), Pcm Communication Failure (Stored), Rear Blend OVERCURRENT (Stored), Rear Blend Pot Circuit Open (Stored), Rear Blend Pot Circuit Shorted (Stored), Rear Heater Coolant Pump Driver OVERCURRENT (Stored), Rear Heater Coolant Pump Open (Stored), Rear Mode OVERCURRENT (Stored), RECIRC OVERCURRENT (Stored), Refrigerant Press RX Failure (Stored), TX Failure (Stored) VIN RX Failure (Stored), Washer Switch Fault (Stored), Zone OVERCURRENT (Stored)
- Notes
- When Monitored & Set Condition
- A/C Switch Fault (Stored)
- Backlight Dimming RX Failure (Stored)
- Blend OVERCURRENT (Stored)
- Checksum Failure (Stored)
- Defog Switch Fault (Stored)
- Engine Gauge RX Failure (Stored)
- Evaporator Temperature Sensor Circuit Open (Stored)
- Evaporator Temperature Sensor Circuit Shorted (Stored)
- LOOPBACK Test Failure (Stored)
- Mode OVERCURRENT (Stored)
- Pcm Communication Failure (Stored)
- Rear Blend OVERCURRENT (Stored)
- Rear Blend Pot Circuit Open (Stored)
- Rear Blend Pot Circuit Shorted (Stored)
- Rear Heater Coolant Pump Driver OVERCURRENT (Stored)
- Rear Heater Coolant Pump Open (Stored)
- Rear Mode OVERCURRENT (Stored)
- RECIRC OVERCURRENT (Stored)
- Refrigerant Press RX Failure (Stored)
- TX Failure (Stored)
- VIN RX Failure (Stored)
- Washer Switch Fault (Stored)
- Zone OVERCURRENT (Stored)
- Possible Causes
- Diagnostic Procedures
- Symptom List: Act CKT Test Passed, OVERCURRENT DTCS Active, Blend Circuit Shorted To Ground, Blend Circuit Shorted To IGN Or Batt, Common Driver Shorted To Ground, Common Driver Shorted To IGN Or Batt, Mode Circuit Shorted To Ground, Mode Circuit Shorted To IGN Or Batt, Rear Blend Circuit Shorted To Ground, Rear Blend Circuit Shorted To IGN Or Batt, Rear Mode Circuit Shorted To Ground, Rear Mode Circuit Shorted To IGN Or Batt, RECIRC Circuit Shorted To Ground, RECIRC Circuit Shorted To IGN Or Batt, Short Too Complex, Zone Circuit Shorted To Ground, Zone Circuit Shorted To IGN Or Batt
- Notes
- When Monitored & Set Condition
- Act CKT Test Passed, OVERCURRENT DTCS Active
- Blend Circuit Shorted To Ground
- Blend Circuit Shorted To IGN Or Batt
- Common Driver Shorted To Ground
- Common Driver Shorted To IGN Or Batt
- Mode Circuit Shorted To Ground
- Mode Circuit Shorted To IGN Or Batt
- Rear Blend Circuit Shorted To Ground
- Rear Blend Circuit Shorted To IGN Or Batt
- Rear Mode Circuit Shorted To Ground
- Rear Mode Circuit Shorted To IGN Or Batt
- RECIRC Circuit Shorted To Ground
- RECIRC Circuit Shorted To IGN Or Batt
- Short Too Complex
- Zone Circuit Shorted To Ground
- Zone Circuit Shorted To IGN Or Batt
- Possible Causes
- Diagnostic Procedures
- Symptom List: Ambient Temp Circuit Open (Active & Stored), Ambient Temp Circuit Shorted (Active & Stored)
- Symptom: Backlight Dimming RX Failure (Active)
- Symptom List: Blend Calibration Fault, Mode Calibration Fault, Rear Blend Calibration Fault, Rear Mode Calibration Fault, RECIRCULATION Calibration, Fault Zone Calibration Fault
- Symptom List: Blend OVERCURRENT (Active), Mode OVERCURRENT (Active), Rear Blend OVERCURRENT (Active), Rear Mode OVERCURRENT (Active), RECIRC OVERCURRENT (Active), Zone OVERCURRENT (Active)
- Symptom: Blower Not On High
- Symptom: Cooldown Test Sensor Failure, Cooldown Time Excessive Fault
- Symptom: Cooldown Test Too Cold To Start
- Symptom: Defog Relay Control CKT Shorted To Batt
- Symptom List: Engine Gauge RX Failure (Active), Pcm Communication Failure (Active), Refrigerant Press RX Failure (Active), VTN RX Failure (Active)
- Symptom: Evaporator Temperature Sensor Circuit Open (Active)
- Symptom: Evaporator Temperature Sensor Circuit Shorted (Active)
- Symptom: LOOPBACK Test Failure (Active)
- Symptom: Rear Blend Pot Circuit Open (Active)
- Symptom: Rear Blend Pot Circuit Shorted (Active)
- Symptom: Rear Heater Coolant Pump Driver OVERCURRENT (Active)
- Symptom: Rear Heater Coolant Pump Open (Active)
- Symptom: TX Failure (Active)
- Symptom: *A/C Status Indicator Flashing, *EBL Status Indicator Flashing
- Symptom: *Blend/Mode/RECIRC Door Operation Improper
- Symptom: *Front A/C - Heater Control Illumination Inoperative
- Symptom: *Front Blower Motor Inoperative
- Symptom: *Front Blower Motor Speeds Incorrect
- Symptom: *HVAC System Test
- Symptom: *Low Heat Output From Front And Rear Heaters At Low Speeds
- Symptom: *Rear A/C - Heater Control Illumination Inoperative
- Symptom: *Rear A/C - Heater Control, Rear Blower Control INOP In One Or More Speeds
- Symptom: *Rear Blower Motor Inoperative
- Symptom: *Rear Blower Motor Speeds Incorrect
- Instrument Cluster
- Symptom: BTSI Output Circuit Shorted Or Open (4.7L EATX Only)
- Symptom: High Beam Indicator Output Open
- Symptom: High Beam Indicator Output Shorted To Battery
- Symptom: PRNDL Switch Circuit Open
- Symptom: PRNDL Switch Circuit Shorted
- Symptom: *All Gauges Not Operating
- Symptom: *Any Hardwired Cluster Indicator Inoperative
- Symptom: *Any PCI Bus Cluster Indicator Inoperative
- Symptom: *Instrument Cluster Dimming Inoperative
- Symptom: *Low Washer Fluid Indicator Always Off
- Symptom: *Low Washer Fluid Indicator Always On
- Symptom: *One Gauge Not Operating Properly
- Symptom: *PRNDL Indicator Malfunction (4.7L)
- Symptom: *Seat Belt Indicator Always Off
- Symptom: *Seat Belt Indicator Always On
- Symptom: *Vehicle Shifts From Park Without Brake Depressed
- Symptom: *Vehicle Will Not Shift From Park With Brake Depressed
- Interior Lighting
- Overhead Console
- Power Door Locks/RKE
- Symptom: Cylinder Lock Switch Failure
- Symptom: Driver Door Lock Switch Short To Ground
- Symptom: Passenger Door Lock Switch Short To Ground
- Symptom: *All Doors Except Driver Fail To Lock And Unlock
- Symptom: *All Doors Except Driver Fail To Unlock From Any Switch
- Symptom: *All Doors Fail To Lock & Unlock From One Switch
- Symptom: *All Doors Fail To Lock And Unlock From Any Switch
- Symptom: *All Doors Fail To Lock And Unlock From Both Cylinder Lock Switches
- Symptom: *All Doors Fail To Lock From Any Switch
- Symptom: *All Doors Fail To Lock From One Switch
- Symptom: *All Doors Fail To Unlock From One Switch
- Symptom: *Automatic (Rolling) Door Locks Inoperative
- Symptom: *Door Lock Inhibit Inoperative
- Symptom: *Driver Door Fails To Lock And Unlock From Any Switch
- Symptom: *Driver Door Fails To Unlock From Any Switch
- Symptom: *One Door Fails To Lock And Unlock From Any Switch
- Symptom: *Remote Keyless Entry Inoperative
- Vehicle Theft/Security
- Symptom: *Alarm Trips On Its Own
- Symptom: *Driver Door Does Not Trip VTSS
- Symptom: *Headlamps Fail To Flash When Alarm Is Tripped
- Symptom: *Horn Fails To Sound When Alarm Is Tripped
- Symptom: *Left Rear Door Does Not Trip VTSS
- Symptom: *Liftgate Does Not Trip VTSS
- Symptom: *Passenger Door Does Not Trip VTSS
- Symptom: *Right Rear Door Does Not Trip VTSS
- Symptom: *Unable To Arm Or Disarm With Door Key
- Symptom: *VTSS Indicator Inoperative
- Symptom: *VTSS Will Not Arm
- Windshield Wiper & Washer
- Symptom: Front Wiper Mode Switch Sense Circuit Short To Ground
- Symptom: Front Wiper Park Switch Sense Circuit High
- Symptom: Front Wiper Relay Control Circuit Short To Ground
- Symptom: Front Wiper Relay Control Circuit Short To Voltage
- Symptom: Rear Wiper Park Switch Sense Circuit Low
- Symptom: Rear Wiper Relay Control Circuit Short To Voltage
- Symptom: *Front Washer Motor INOP
- Symptom: *Front Wiper High Speed INOP
- Symptom: *Front Wiper Intermittent INOP
- Symptom: *Front Wiper Low Speed INOP
- Symptom: *Rear Washer Motor INOP
- Symptom: *Rear Wiper Always On
- Symptom: *Rear Wiper INOP
- Verification Tests
- Airbag
- System Component Locations
- Connector PINOUTS
- Schematic Diagrams