A L L Diagnostic Trouble Codes ( DTC )
Testing and Inspection- Diagnostic Trouble Code Descriptions
- Manufacturer Code Charts
- Diagnostic Notes (Read Before Proceding)
- Code to Test Chart
- Driveability (DR) Tests
- Diagnostic Notes (Read Before Proceding)
- DR-1A CODE to DR TEST Chart (Checking for Fault Codes)
- DR-1B Output Circuits of ECM Controlled Components
- DR-1C Shift Indicator Lamp Circuit
- DR-1D Switch Inputs to the SMEC
- DR-1E Brake Switch Input Circuit to the SMEC
- DR-1F Checking the Idle Contact Switch
- DR-1G Throttle Switch Wires For an Open Circuit
- DR-1H Throttle Switch Wire For an Open Circuit
- DR-1I Park/Neutral Switch Input to SMEC (S4 Circuit)
- DR-1J A/C Push Button Switch Input to the SMEC
- DR-1K Automatic Idle Speed Motor Operation
- DR-1L Checking AIS Motor SMEC 60-Way Connector
- DR-1M AIS Motor Wires at the SMEC 60-Way Connector
- DR-1N Checking SMEC Ground Circuits
- DR-1O Failures Caused By Wiring &/or Connectors
- DR-2A Fault Codes 13 &/or 14 MAP Sensor Circuit
- DR-2B Check MAP Sensor Circuit In SMEC
- DR-2C MAP Sensor Signal Circuit
- DR-2D MAP Sensor Wires to SMEC For Open Circuit
- DR-2E Checking 5 Volt Supply to MAP Sensor
- DR-3A Fault Code 15-Speed Sensor Circuit
- DR-3B Speed Sensor Signal Wire to SMEC For Open
- DR-3C Speed Sensor Ground Wire to SMEC For Open
- DR-4A Fault Code 21-Oxygen Sensor Circuit
- DR-4B Oxygen Sensor Wire to SMEC For Open Circuit
- DR-5A Fault Code 22-Coolant Sensor Circuit
- DR-5B Coolant Sensor Circuit to SMEC
- DR-5C Coolant Sensor Wires to SMEC For Open Circuit
- DR-6A Fault Code 23-Throttle Body Temperature Sensor
- DR-6B Throttle Body Temperature Sensor Circuit
- DR-6C Throttle Body Temperature Sensor Wires to SMEC
- DR-7A Fault Code 24-Throttle Position Sensor Circuit
- DR-7B Throttle Position Sensor Signal to SMEC
- DR-7C TPS Wires to SMEC For Open Circuit
- DR-7D Check 5 Volt Supply to Throttle Position Sensor
- DR-8A Fault Code 25-Automatic Idle Speed Motor
- DR-8B AIS Motor Circuit For A Short
- DR-9A Fault Code 31-Canister Purge Solenoid Circuit
- DR-9B Canister Purge Solenoid Control Wire
- DR-9C Canister Purge Solenoid Supply Voltage
- DR-9D Canister Purge Solenoid Control
- DR-9E Canister Purge Solenoid
- DR-10A Fault Code 32-EGR System
- DR-10B EGR Solenoid Control Wire For Open Circuit
- DR-10C Checking For Supply Voltage to EGR Solenoid
- DR-10D EGR Solenoid Control Wire For A Short
- DR-10E Checking EGR Solenoid
- DR-10F Checking EGR System
- DR-10G Vacuum Supply From Backpressure Valve
- DR-10H EGR Valve Operation
- DR-10H EGR Valve Vacuum Chamber
- DR-11A Fault Code 33-A/C Cutout Relay
- DR-11B A/C Cutout Relay Control Wire For Open
- DR-11C A/C Output Relay Pull-In Coil Circuit For Short
- DR-11D Voltage Supply to A/C Cutout Relay Pull-In Coil
- DR-12A Fault Code 35-Idle Contact Switch
- DR-12B Idle Contact Switch Wire For Short to Ground
- DR-13A Fault Code 36-Air Switching Solenoid
- DR-13B Air Switching Solenoid Control Wire
- DR-13C Supply Voltage to Air Switching Solenoid
- DR-13D Air Switching Solenoid Control Wire
- DR-13E Air Switching Solenoid
- DR-14A Fault Code 37-Lock-Up Relay Non Overdrive
- DR-14B Transmission Lock-Up Relay Control Wire
- DR-14C Lock-Up Relay For A Short to Ground
- DR-14D Voltage Supply to Transmission Lock-Up Relay
- DR-14E Fault Code 37-Lock-Up Solenoid Overdrive
- DR-14F Transmission Lock-Up Solenoid Control Wire
- DR-14G Voltage to Transmission Lock-Up Solenoid
- DR-15A Checking For Fault Code 44
- DR-16A Fault Code 45-Transmission Overdrive Solenoid
- DR-16B Transmission Overdrive Solenoid Control Wire
- DR-16C Voltage to Transmission Overdrive Solenoid
- DR-17A Sensor Calibration-Engine Coolant Temperature
- DR-17B Sensor Calibration-Throttle Position Sensor
- DR-17C Sensor Calibration-Throttle Position Sensor
- DR-17D Sensor Calibration-Throttle Position Sensor
- DR-17E Sensor Calibration-MAP Sensor
- DR-17F Sensor Calibration-MAP Sensor
- DR-17G Sensor Calibration-Throttle Body Temperature
- DR-18A Checking For Fuel Fouled Spark Plugs
- DR-18B Heated Air Intake System
- DR-19A Sensor Calibration-Engine Coolant Temperature
- DR-19B Sensor Calibration-Throttle Position Sensor
- DR-19C Sensor Calibration-Throttle Position Sensor
- DR-19D Sensor Calibration-Throttle Position Sensor
- DR-19E Sensor Calibration-MAP Sensor
- DR-19F Sensor Calibration-MAP Sensor
- DR-19G Sensor Calibration-Throttle Body Temperature
- DR-19H Heated Air Intake System
- DR-20A Checking EGR System
- DR-20B Vacuum Supply From Backpressure Valve
- DR-20C Checking EGR Valve Operation
- DR-20D EGR Valve Vacuum Chamber For Leaks
- DR-21A Air Switching System
- DR-21B Air Switching Valve
- DR-21C Vacuum Supply to the Air Switching Valve
- DR-21D Air Switching Valve Vacuum Supply Line
- DR-22A Checking Secondary Ignition System
- DR-23A Checking Basic Ignition Timing
- DR-23B Checking Spark Advance
- DR-24A Check Fuel Supply & Return System
- DR-24B Checking For Low Fuel Pressure
- DR-24C Checking For Low Fuel Pressure
- DR-24D Checking For High Fuel Pressure
- DR-25A Throttle Body Minimum Air Flow
- DR-26A Throttle Body Maximum Air Flow
- DR-27 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-2A Sensor Calibration-Battery Temperature
- CH-2B Charging System Operating Voltage
- CH-3A Fault Code 16-Battery Voltage Sensing Circuit
- CH-4A Fault Code 46 or 41-46 Alternator Field
- CH-4B Alternator Field Control Wire
- CH-4C Charging System Control of the SMEC
- CH-5A Fault Code 41 or 41-47 or 47 Alternator Field
- CH-5B Alternator Field Control Wire
- CH-5C Charging System Control Circuit
- CH-5D Charging System Control Wire
- Cruise Control
- Related Tests, Information and Procedures