A L L Diagnostic Trouble Codes ( DTC )
Testing and Inspection
- Diagnostic Trouble Code Descriptions
- Manufacturer Code Charts
- Code to Test Chart
- Driveability (DR) Tests
- DR-1A CODE to DR TEST Chart (Checking for Fault Codes)
- DR-1B Output Circuits of ECM Controlled Components
- DR-1C Checking Switch Inputs to Logic Module
- DR-1D Brake Switch to Logic Module (W/O Speed Control)
- DR-1E Brake Switch to Logic Module (W/Speed Control)
- DR-1F Park/Neutral Switch Input to Logic Module
- DR-1G A/C Push Button Switch Input Circuit
- DR-1H Checking Fuel Injectors
- DR-1I Automatic Idle Speed Motor Operation
- DR-1J AIS Motor Signal From Logic Module (Turbo I)
- DR-1K AIS Motor Signal at Logic Module (Turbo I)
- DR-1L AIS Motor Signal From Logic Module (Turbo II)
- DR-1M AIS Motor Signal From Logic Module (Turbo II)
- DR-1N AIS Motor Signal at Logic Module (Turbo II)
- DR-1O AIS Motor Signal at Logic Module (Turbo II)
- DR-1P Checking Computer Ground Circuits
- DR-1Q Intermittent Caused By Wiring &/or Connectors
- DR-2A Fault Codes 13 &/or 14 MAP Sensor Circuit
- DR-2B MAP Sensor Circuit In Logic Module
- DR-2C MAP Sensor Signal Circuit to Logic Module
- DR-2D MAP Sensor Wires to Logic Module
- DR-2E Checking 5 Volt Supply to MAP Sensor
- DR-3A Fault Code 15 Speed Sensor Circuit
- DR-3B Speed Sensor Circuit to Logic Module
- DR-4A Fault Code 21-Oxygen Sensor Circuit
- DR-4B Oxygen Sensor Circuit at Logic Module
- DR-5A Fault Code 22-Coolant Sensor Circuit
- DR-5B Coolant Sensor Circuit to Logic Module
- DR-5C Coolant Sensor Wires to Logic Module
- DR-6A Fault Code 23 Charge Temperature Sensor
- DR-6B Charge Temperature Sensor Signal Circuit
- DR-6C Charge Temperature Sensor Wire to Logic Module
- DR-7A Fault Code 24 Throttle Position Sensor Circuit
- DR-7B Throttle Position Sensor Signal Circuit
- DR-7C Throttle Position Sensor Wires to Logic Module
- DR-7D Check 5 Volt Supply to Throttle Position Sensor
- DR-8A Fault Code 25 AIS Motor Circuit Turbo I
- DR-8B AIS Motor Control Wires (Turbo I)
- DR-8C Fault Code 25 AIS Motor Circuit Turbo II
- DR-8D AIS Motor Circuit For A Short (Turbo II)
- DR-8E AIS Motor Control Wires (Turbo II)
- DR-8F Fused J2 Wire From Power Module For an Open
- DR-9A Fault Code 31 EGR/Canister Purge Solenoid
- DR-9B Canister Purge/EGR Solenoid Control Wire
- DR-10A Fault Code 33 A/C Cutout Relay
- DR-10B A/C Cutout Relay Module Wire
- DR-10C A/C Cutout Relay Pull-In Coil Windings
- DR-11A Fault Code 35 Radiator Fan Relay
- DR-11B Radiator Fan Relay Control Wire
- DR-11C Radiator Fan Relay Pull-In Coil Windings
- DR-12A Fault Code 36/36-45 Wastegate Solenoid
- DR-12B Wastegate Solenoid Control Wire
- DR-13A Fault Code 37 BARO Read Solenoid Circuit
- DR-13B BARO Read Solenoid Control Wire
- DR-13C BARO Read Solenoid Windings For an Open Circuit
- DR-14A Fault Code 45 Overboost Shutoff
- DR-14B Checking Vacuum Supply to Wastegate Solenoid
- DR-15A Engine Coolant Temperature Sensor
- DR-15B Throttle Position Sensor
- DR-15C Throttle Position Sensor
- DR-15D Sensor Calibration MAP Sensor
- DR-15E Sensor Calibration MAP Sensor
- DR-15F Charge Temperature Sensor
- DR-16 Checking EGR System
- DR-17 Checking For Fuel Fouled Spark Plugs
- DR-18A Engine Coolant Temperature Sensor
- DR-18B Throttle Position Sensor
- DR-18C Throttle Position Sensor
- DR-18D Throttle Position Sensor
- DR-18E Sensor Calibration MAP Sensor
- DR-18F Sensor Calibration MAP Sensor
- DR-18G Charge Temperature Sensor
- DR-19A EGR Vacuum From Throttle Body to EGR Valve
- DR-19B Vacuum From Back Pressure Valve to EGR Valve
- DR-19C Checking EGR Valve Operation
- DR-19D EGR Valve Vacuum Chamber For Leaks
- DR-20 Checking Secondary Ignition System
- DR-21A Checking Basic Ignition Timing
- DR-21B Checking Spark Advance
- DR-22A Fuel Supply & Return System
- DR-22B Checking For Low Fuel Pressure
- DR-22C Checking For Low Fuel Pressure
- DR-22D Checking For High Fuel Pressure
- DR-23 Oxygen Sensor Operation
- DR-24 Throttle Body Minimum Air Flow
- DR-25 Driveability Problems Not Related to Engine Controls
- Charging System (CH) Tests
- CH-1A Checking Charging System For Fault Codes
- CH-1B Checking For Intermittent Failures
- CH-2 Fault Code 16-Battery Voltage Sense Problem
- CH-3 Fault Code 16 Battery Voltage Sensing Circuit
- CH-4A Fault Code 46 or 41-46 Alternator Field
- CH-4B Alternator Field Control to the Power Module
- CH-4C Alternator Field Control to the Logic Module
- CH-5A Fault Code 41 or 41-47 or 47 Alternator Field
- CH-5B Field Control Circuit at the Logic Module
- CH-5C Field Control Wire to the Power Module
- CH-5D Field Control Circuit of the Power Module
- CH-5E Field Control to the Power Module
- CH-5F Check Voltage to Alternator Field Circuit
- CH-6A Fault Code 44 Battery Temperature
- CH-6B Battery Temperature Sensor Wire
- CH-6C Battery Temperature Sensor Wire
- Cruise Control
- 1A Checking Speed Control System For Fault Codes
- 1B Speed Control Switch Inputs to the Logic Module
- 2A Fault Code 34 Speed Control Servo
- 2B Fault Code 34 Speed Control Vent Solenoid
- 2C S/C Vent Solenoid Control Wire
- 2D S/C Vent Solenoid Control Wire
- 2E S/C Vacuum Solenoid to the Logic Module
- 2F S/C Vacuum Solenoid Wire to the Logic Module
- 2G Power Supply to Speed Control Servo
- 2H Power Supply Through the Brake Switch
- 2I Power Supply to the Brake Switch
- 3A Servo Ground Circuit
- 3B Speed Control Servo Operation
- 4A S/C System on/Off Function In the Logic Module
- 4B Speed Control Power Circuit
- 4C Power Supply Circuit
- 5
- 5A Set Function In the Logic Module
- 6
- Heating and Air Conditioning
- Speed Control (SC) Tests
- SC-1A Check Speed Control System For Fault Codes
- SC-1B Switch Inputs to the Logic Module
- SC-2A Fault Code 34-Speed Control Servo (Vacuum)
- SC-2B Fault Code 34 Speed Control Vent Solenoid
- SC-2C S/C Vent Solenoid Control Wire
- SC-2D S/C Vent Solenoid Control Wire
- SC-2E S/C Vacuum Solenoid to the Logic Module
- SC-2F S/C Vacuum Solenoid Wire to the Logic Module
- SC-2G Power Supply to the S/C Servo
- SC-2H S/C Power Supply Through the Brake Switch
- SC-2I S/C Power Supply to the Brake Switch
- SC-3A S/C Servo Ground Circuit
- SC-3B Speed Control Servo Operation
- SC-4A S/C System on/Off Function In the Logic Module
- SC-4B S/C System Power Supply Circuit
- SC-4C Power Supply Circuit (X32)
- SC-5A Set Function In the Logic Module
- SC-5B Speed Control System Set Circuit
- SC-6A Resume Function In the Logic Module
- SC-6B Speed Control System Resume Circuit