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 Voltage to Transmission Unlock Solenoid
- DR-1D Transmission Unlock Solenoid
- DR-1E Voltage to Transmission Unlock Relay
- DR-1F Checking For Intermittent Failures
- DR-2A Fault Code 11-Oxygen Solenoid Circuit
- DR-2B Oxygen Solenoid Control Circuit
- DR-2C Voltage to Oxygen Solenoid
- DR-3A Fault Code 12-Transmission Unlock Relay
- DR-3B Transmission Unlock Relay Control Circuit
- DR-3C Voltage to Transmission Unlock Relay Coil
- DR-3D Transmission Unlock Relay Ground
- DR-3E Transmission Unlock Relay Pull In Coil Circuit
- DR-4A Fault Code 13-Air Switching Solenoid
- DR-4B Air Switching Solenoid Wire For Open Circuit
- DR-4C Air Switching Control Wire For Short to Ground
- DR-4D Vacuum Actuated Electrical Switch
- DR-5A Fault Code 17-Throttle Control Solenoid
- DR-5B Throttle Control Solenoid Control Circuit
- DR-5C Throttle Control Solenoid
- DR-6A Fault Code 18-Canister Purge Solenoid Circuit
- DR-6B Canister Purge Solenoid Control Wire
- DR-6C Canister Purge Solenoid Control Circuit
- DR-7A Fault Code 22-Oxygen Feedback System (Lean)
- DR-7B Checking Computer Control Circuit
- DR-7C Oxygen Feedback System Control Solenoid
- DR-7D Oxygen Sensor Wire to Computer
- DR-8A Fault Code 23-Oxygen Feedback System (Rich)
- DR-8B Computer Control Circuit
- DR-8C Checking Oxygen Solenoid
- DR-9A Fault Code 25-Charge Temperature Switch
- DR-9B Charge Temperature Circuit to Computer
- DR-9C Charge Temperature Switch Wires to Computer
- DR-10A Fault Code 26-Engine Temperature Sensor
- DR-10B Coolant Sensor Circuit to Computer
- DR-10C Coolant Sensor Wires to Computer
- DR-11A Fault Code 28-Speed Sensor Circuit
- DR-11B Speed Sensor Circuit to Computer
- DR-11C Speed Sensor Wire For Open Circuit
- DR-11D Checking Speed Sensor
- DR-12A Checking For No Code 88
- DR-12B Checking For No Code 88
- DR-12C Checking For No Code 88
- DR-13A Choke & Fast Idle Cam Linkage
- DR-14A Choke Vacuum Kick
- DR-15A Heated Air Intake System
- DR-16A Engine Coolant Sensor Calibration
- DR-17A EGR CVSCC Valve
- DR-18A Choke Position Engine Running
- DR-18B Checking Choke Control
- DR-18C Checking Choke Heater
- DR-18D Voltage to Choke Control
- DR-18E Voltage to Oil Pressure Switch
- DR-18F Wire to Oil Pressure Switch
- DR-18G Vacuum Supply to Choke Vacuum Kick Diaphragm
- DR-19A Fuel Fouled Spark Plugs
- DR-20A Checking Carburetor Switch
- DR-21A Engine Temperature Sensor Calibration
- DR-22A Checking Choke Position
- DR-22B Checking Choke Control
- DR-22C Checking Choke Heater
- DR-22D Voltage to Choke Control
- DR-22E Voltage to Oil Pressure Switch
- DR-22F Wire to Oil Pressure Switch
- DR-23A Checking EGR System
- DR-23B Checking EGR Valve
- DR-23C Vacuum Supply to EGR Valve
- DR-23D Vacuum Supply to EGR CVSCC Valve
- DR-23E Checking EGR CVSCC Valve
- DR-24A Air Switching System
- DR-24B Air Supply From Upstream Air Port
- DR-24C Air Supply From Upstream Air Port
- DR-24D Vacuum to Air Switching Valve
- DR-25A Heated Air Intake System
- DR-26A Bowl Vent System
- DR-26B Bowl Vent System
- DR-26C Voltage to Bowl Vent Solenoid
- DR-27A Idle Control Vacuum Kicker
- DR-27B Idle Control Kicker Operation With A/C on
- DR-27C Checking A/C Input Signal to Computer
- DR-27D A/C Input Signal to Computer
- DR-28A Secondary Ignition System
- DR-29A Basic Ignition Timing
- DR-29B Ignition Spark Advance
- DR-29C Vacuum Supply to Computer
- DR-29D Calibration of the Computer Vacuum Transducer
- DR-30A Checking Idle RPM
- DR-30B Checking Propane RPM
- DR-30C Fast Idle RPM
- DR-31 Driveability Problems Not Related to Engine Controls