Tests W/Codes
- 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
- 4A-F Diagnostic Circuit Check
- Ecu Terminal Identification
- Test 1 - Ecu (B+) Circuit (4A-F)
- Test 2 - Ecu Power Source (4A-F)
- Test 3 Or Code 12 - Rpm Signal (4A-F)
- Code 21 - O2 Sensor Signal (4A-F)
- Test 4 Or Code 22 - Coolant Temp Switch Signal (4A-F)
- Test 5 Or Code 25, 26 - Lean Or Rich Air/Fuel Mixture (4A-F)
- Test 6 Or Code 31 - Vacuum Switch Signal (4A-F)
- Test 7 Or Code 41 - TPS Signal (4A-F)
- Test 8 Or Code 71 - EGR System Malfunction (4A-F)
- Test 9 Or Code 72 - Fuel-Cut Solenoid Signal (4A-F)
- Test 10 - Charging System Circuit (4A-F)
- Test 11 - "Check Engine" Light Circuit (4A-F)
- 4A-FE & 4A-GE Diagnostic Circuit Check
- 4A-FE & 4A-GE Ecu Terminal Identification
- Test 1 Or Code 11 - Ecu (+B) Circuit (4A-FE & 4A-GE)
- Test 2 - Ecu Power Source (4A-FE & 4A-GE)
- Test 3 Or Code 12, 13, 14 - Ignition & Rpm Signal
- Test 4 Or Code 21, 25, 26- Oxygen Sensor Signal (4A-FE & GE)
- Test 5 Or Code 22 - Coolant Temp Sensor Signal (4A-FE & GE)
- Test 6 Or Code 24 - Intake Air Temp Sensor (4A-FE & 4A-GE)
- Test 7 Or Code 31 - Airflow Meter/Vacuum Sensor
- Test 8 Or Code 41 - TPS Signal (4A-FE & 4A-GE)
- Code 42 - Vehicle Speed Sensor (VSS) Signal
- Test 9 Or Code 43 - Starter Signal (4A-FE & 4A-GE)
- Test 10 Or Code 51 - A/C Switch Signal (4A-FE & 4A-GE)
- Test 11 Or Code 71 - EGR System Malfunction (4A-GE)
- Test 12 - Injector Circuit (4A-FE & 4A-GE)
- Test 13 - "Check Engine" Circuit (4A-FE & 4A-GE)