Tests W/Codes - EFI
- Introduction
- Ecu Location
- "Hard Failures"
- "Intermittent Failures"
- Check Engine Light
- Retrieving Trouble Codes
- Notes On Trouble Codes
- Clearing Trouble Codes
- Repair Procedure
- Summary
- Trouble Code Charts
- Trouble Code Diagnostic Hints
- Diagnostic Circuit Check
- Ecu Terminal Identification
- Diagnostic Tests
- Test 1 - Ecu (B+) Circuit
- Test 2 - Ecu Power Source
- Test 3 Or Code 12, 13, 14 - Ignition & Rpm Signal
- Code 21 - O2 Sensor/Heater Signal
- Test 4 Or Code 22 - Coolant Temperature Sensor Signal
- Test 5 Or Code 24 - Intake Air Temp Sensor Signal
- Code 25 - Lean Air/Fuel Ratio
- Code 26 - Rich Air/Fuel Ratio
- Code 27 - Sub-O2 Sensor Signal
- Test 6 Or Code 31 - Airflow Meter Signal
- Test 7 Or Code 41 - Throttle Position Sensor Signal
- Code 42 - Vehicle Speed Sensor Signal
- Test 8 Or Code 43 - Starter Signal
- Code 51 - Switch Signal
- Test 9 Or Code 71 - EGR Malfunction
- Test 10 - A/C Switch Circuit
- Test 11 - Oxygen Sensor/Heater Signal
- Test 12 - Injector Circuit
- Test 13 - "Check Engine" Light Circuit
- Test 14 - EFI Main Relay Circuit