2.8L Feedback Tests W/Codes
- Diagnosis & Testing
- Diagnostic Circuit Check
- System Performance Check
- Chart A1 - Dwell Fixed Under 10°
- Chart A2 - Dwell Fixed Between 10°-50°
- Chart A3 - Dwell Fixed Over 50°
- Chart A5 - "Check Engine" Light Inoperative
- Chart A6 - No Code 12/"Check Engine" Light Always On
- Code 12 - No Distributor Reference Pulses
- Code 13 - Oxygen Sensor Circuit
- Code 14 - Coolant Sensor Shorted
- Code 15 - Coolant Sensor Open
- Code 21 - TPS Circuit High
- Code 23 - M/C Solenoid Circuit Low
- Code 34 - Differential Pressure (Vacuum) Sensor
- Code 41 - No Distributor Reference Signal
- Code 42 - Electronic Spark Timing (Est)
- Code 44 - Lean Exhaust Indication
- Code 45 - Rich Exhaust Indication
- Code 51 - Faulty Prom
- Code 54 - M/C Solenoid Circuit Voltage High
- Chart C1 - ECM Replacement Check
- Chart C1E - Vac Sensor
- Chart C2F - TPS Enrichment Check
- Chart C4B - Ignition System
- Chart C4D - Est Performance Check
- Chart C5 - ESC Check (No Code 43)
- Chart C6C - Electric Diverter Valve (EDV) Check
- Chart C7C - EGR Valve Check (Non-ECM Controlled)
- Chart C8B - TCC Electrical Diagnosis
- Chart C9E - Electric EFE
- Chart C10D - A/C Wot Relay Check
- Park Neutral Switch Diagnosis (Auto Trans Only)
- Crank Signal
- Map Output Check
- Power Steering Pressure Signal
- EGR Valve Check Non-ECM Controlled
- Transmission Converter Clutch (TCC) Elect. Diagnosis
- Shift Light
- A/C Clutch Control
- Wiring Diagrams