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 Transmission Unlock Solenoid Control Wire
- DR-1G 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 Purge Solenoid Control Circuit
- DR-5A Fault Code 17-Throttle Control Solenoid
- DR-5B Throttle Control Solenoid Control Circuit
- DR-6A Fault Code 18-EGR or Canister Purge Solenoid
- DR-6B EGR or Canister Purge Solenoid Control Wire
- DR-6C EGR or Canister Purge Solenoid Control Circuit
- DR-7A Fault Code 22-Oxygen Feedback System
- DR-7B Oxygen Feedback System Operation
- DR-7C Oxygen Feedback System For Rich Condition
- DR-7D Oxygen Feedback System For Lean Condition
- DR-7E Oxygen Sensor Wire to Computer For Open
- DR-8A Fault Code 25-Charge Temperature Switch
- DR-8B Charge Temperature Circuit to Computer
- DR-8C Charge Temperature Switch Control Wire
- DR-9A Fault Code 26-Engine Temperature Sensor
- DR-9B Coolant Sensor Circuit to Computer
- DR-9C Coolant Sensor Wires to Computer
- DR-10A Fault Code 28-Speed Sensor Circuit
- DR-10B Speed Sensor Circuit to the Computer
- DR-10C Speed Sensor Wire For Open to Computer
- DR-10D Checking Speed Sensor
- DR-11A Checking For No Code 88
- DR-11B Checking For No Code 88
- DR-11C Checking For No Code 88
- DR-12A Choke & Fast Idle Cam Linkage
- DR-13A Checking Choke Vacuum Kick
- DR-14A Heated Air Intake System
- DR-15A Engine Coolant Sensor Calibration
- DR-16A EGR or Canister Purge CVSCC Valve
- DR-17A Choke Position Engine Running
- DR-17B Checking Choke Control
- DR-17C Checking Choke Heater
- DR-17D Voltage to Choke Control
- DR-17E Voltage to Oil Pressure Switch
- DR-17F Wire to Oil Pressure Switch
- DR-17G Vacuum Supply to Choke Vacuum Kick Diaphragm
- DR-18A Checking For Fuel Fouled Spark Plugs
- DR-19A Checking Carburetor Switch
- DR-20A Engine Temperature Sensor Calibration
- DR-21A Checking Choke Position
- DR-21B Checking Choke Control
- DR-21C Checking Choke Heater
- DR-21D Voltage to Choke Control
- DR-21E Voltage to Oil Pressure Switch
- DR-21F Wire to Oil Pressure Switch
- DR-22A Checking EGR System
- DR-22B Checking EGR Valve
- DR-22C Vacuum Supply to EGR Valve
- DR-22D Vacuum Supply to EGR Valve
- DR-22E EGR Vacuum Supply
- DR-22F Vacuum to EGR Amplifier
- DR-22G Vacuum to EGR Amplifier
- DR-22H Vacuum Supply to CVSCC Valve
- DR-22I Checking CVSCC Valve
- DR-23A Canister Purge System CVSCC Valve
- DR-24A Air Switching System
- DR-24B Vacuum to Air Switching Valve
- DR-25A Heated Air Intake System
- DR-26A Checking Bowl Vent System
- DR-26B Bowl Vent System
- DR-26C Bowl Vent System
- DR-26D Bowl Vent System
- DR-26E Voltage to Bowl Vent Solenoid
- DR-27A Checking Start to Run Transfer
- DR-27B Run Pickup Coil Circuit
- DR-27C Checking Pickup Air Gap
- DR-27D Run Pickup Coil
- DR-28A Idle Control Solenoid During Hot Restart
- DR-28B Idle Control Solenoid Operation With A/C on
- DR-28C A/C Input Signal to Computer
- DR-28D A/C Input Signal to Computer
- DR-29A Checking Secondary Ignition System
- DR-30A Checking Basic Ignition Timing
- DR-30B Checking Basic Ignition Timing
- DR-30C Vacuum Supply to Computer
- DR-30D Calibration of Vacuum Transducer
- DR-31A Checking Idle RPM
- DR-31B Checking Propane RPM
- DR-31C Checking Fast Idle RPM
- DR-31D Idle Solenoid RPM
- DR-32 Driveability Problems Not Related to Engine Controls