| 1A & 1D 1C |
Digital Code Tester Air By-Pass Solenoid Valve "B" |
Below 1.5V or About 12V Depending on Signal About 12V |
| 1E |
Idle Switch (In Throttle Position Sensor) |
Below 1.5V at Idle |
| 1G |
Neutral & Clutch Switch |
About 12V (In Neutral), Below 1.5V (In Gear) |
| 1H |
Coolant Temperature Switch |
Below 1.5V |
| 1I |
5th Gear Switch |
About 12V (In 5th Gear) |
| 1J |
Brake Switch |
About 12V When Depressing Brake Pedal |
| 1L |
A/C Clutch Circuit |
Below 1.5V When Switch Is "Off" |
| 1M |
Ignition Coil Negative Terminal |
About 12V |
| 1S |
Shift Indicator Light |
About 12V (Below 1.5V @ 2000 RPM or Greater) |
| 1V |
Air By-Pass Solenoid Valve "C" |
About 12V |
| 2A |
Throttle Position Sensor, Atmospheric Pressure Sensor |
Between 4.5-5.5V |
| 2B |
Airflow Meter "Vc" Terminal |
Between 6-10V |
| 2C |
Atmospheric Pressure Sensor, Airflow Meter, Coolant Thermosensor, Throttle Position Sensor |
Below 1.5V |
| 2D |
Oxygen Sensor |
Zero |
| 2E |
Airflow Meter "Vs" Terminal |
Between .7-2.7V |
| 2G |
Throttle Position Sensor |
Between .4-.6V |
| 2H |
Atmospheric Pressure Sensor |
About 4V (At Sea Level) |
| 2I |
Coolant Thermosensor |
About .5V |
| 2J |
Intake Air Temperature Sensor |
About 2.3V at 68°F (20°C) |
| 2K |
Pressure Regulator Control Valve |
About 12V (Below 1.5V 2 Minutes After Starting) |
| 2N |
Three-Way Solenoid Valve (EGR Control) |
Below 1.5V |
| 2P |
Three-Way Solenoid Valve (Purge Control) |
About 12V |
| 2R |
Engine Ground |
Below 1.5V |
| 3A & 3G |
Engine Ground |
Below 1.5V |
| 3B |
Ignition Switch "START" Position |
Below 1.5V |
| 3C & 3E |
Injectors |
About 12V (3C Injectors 2 & 4, 3E Injectors 1 & 3) |
| 3D |
Inhibitor Switch |
Below 2V (In "P" or "N"), About 12V (All Others) |
| 3J |
Main Relay |
About 12V |