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Pretesting Inspection
If ECI system components fail, interruption of fuel supply or failure to supply proper amount of fuel for engine operation will result. The following conditions will result: engine is hard to start or does not start at all, unstable idle and/or poor driveability. Before testing ECI system, perform basic engine checks first (ignition system, incorrect engine adjustments, etc.).
ECI SYSTEM CHECK PROCEDURE - SELECT SWITCH POSITION "A"
| ECI Checker Check Switch Position And Details |
Specifications |
| 1 |
| Function Being Checked |
Power Supply |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
N/A |
| Normal Reading |
11-13V |
| Terminal No. |
B1 |
| 2 |
| Function Being Checked |
Variable Resistor |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
N/A |
| Normal Reading |
N/A |
| Terminal No. |
A10 |
| 3 |
| Function Being Checked |
Throttle Position Sensor |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Accelerator Fully Closed - Normal Reading |
0-0.6V |
| Accelerator Fully Opened - Normal Reading |
4.5V |
| Terminal No. |
A1 |
| 4 |
| Function Being Checked |
Coolant Temperature Sensor |
| Procedure |
Ignition Switch "OFF" to "ON" |
| 32°F(0°C) - Normal Reading |
3.5V |
| 68°F (20°C) - Normal Reading |
2.6V |
| 104°F (40°C) - Normal Reading |
1.8V |
| 176°F (80°C) - Normal Reading |
0.6V |
| Terminal No. |
A3 |
| 5 |
| Function Being Checked |
Intake Air Temperature Sensor |
| Procedure |
Ignition Switch "OFF" to "ON" |
| 32°F(0°C) - Normal Reading |
3.5V |
| 68°F (20°C) - Normal Reading |
2.6V |
| 104°F (40°C) - Normal Reading |
1.8V |
| 176°F (80°C) - Normal Reading |
0.7V |
| Terminal No. |
A4 |
| 6 |
| Function Being Checked |
Idle Position Switch |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Accelerator Fully Closed - Normal Reading |
OV |
| Accelerator Fully Opened - Normal Reading |
11-13V |
| Terminal No. |
A5 |
| 7 |
| Function Being Checked |
Idle Speed Control Solenoid Valve |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
Compressor Switch Off |
| Normal Reading |
11-13V |
| Terminal No. |
A14 |
| 8 |
| Function Being Checked |
EGR Control Solenoid Valve |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
N/A |
| Normal Reading |
11-13V |
| Terminal No. |
B4 |
| 9 |
| Function Being Checked |
Spark Retard Signal |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
N/A |
| Normal Reading |
Over 4V |
| Terminal No. |
B6 |
| 10 |
| Function Being Checked |
Pressure Solenoid Valve |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
N/A |
| Normal Reading |
0-12V In 0.6 Sec. |
| Terminal No. |
B12 |
| 11 |
| Function Being Checked |
Compressor Switch |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
Compressor Switch from "OFF to ON" |
| Normal Reading |
11-13V |
| Terminal No. |
A15 |
| 12 |
| Function Being Checked |
Secondary Air Control Solenoid Valve |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
N/A |
| Normal Reading |
11-13V |
| Terminal No. |
B11 |
ECI SYSTEM CHECK PROCEDURE - SELECT SWITCH POSITION "B"
| ECI Checker Check Switch Position And Details |
Specifications |
| 1 |
| Function Being Checked |
Cranking Signal |
| Procedure |
Ignition Switch "OFF" to "ON" |
| Condition |
N/A |
| Normal Reading |
Over 8V |
| Terminal No. |
A13 |
| 2 |
| Function Being Checked |
Control Relay |
| Procedure |
Idling |
| Condition |
N/A |
| Normal Reading |
OV |
| Terminal No. |
B5 |
| 3 |
| Function Being Checked |
Idle Speed Control Solenoid Valve |
| Procedure |
Idling |
| Cooler Switch "OFF" - Normal Reading |
12V |
| Cooler Switch "OFF to ON" - Normal Reading |
OV |
| Terminal No. |
A12 |
| 4 |
| Function Being Checked |
Ignition Pulse |
| Procedure |
Idling |
| Condition |
N/A |
| Normal Reading |
12-14V |
| Terminal No. |
A8 |
| 5 |
| Function Being Checked |
Air Flow Sensor |
| Procedure |
Idling |
| Condition |
N/A |
| Normal Reading |
3V |
| Procedure |
3000 RPM |
| Condition |
N/A |
| Normal Reading |
3V |
| Terminal No. |
A7 |
| 6 |
| Function Being Checked |
Injector 1 Pulse |
| Procedure |
Idling |
| Condition |
N/A |
| Normal Reading |
13-14V |
| Procedure |
3000 RPM |
| Condition |
N/A |
| Normal Reading |
13V |
| Terminal No. |
B9 |
| 7 |
| Function Being Checked |
Injector 2 Pulse |
| Procedure |
Idling |
| Condition |
N/A |
| Normal Reading |
13-14V |
| Procedure |
3000 RPM |
| Condition |
N/A |
| Normal Reading |
13V |
| Terminal No. |
B10 |
| 8 |
| Function Being Checked |
Oxygen Sensor |
| Procedure |
After Warm-Up |
| Condition |
To Heat Up Sensor |
| Normal Reading |
0-1-2.7V |
| Procedure |
N/A |
| Condition |
To Heat Up Sensor |
| Normal Reading |
0-1-2.7V |
| Terminal No. |
A6 |
| 9 |
| Function Being Checked |
EGR Control |
| Procedure |
Idling |
| Condition |
After Warm-Up |
| Normal Reading |
OV |
| Function Being Checked |
Solenoid Valve |
| Procedure |
800-3000 RPM |
| Condition |
After Warm-Up |
| Normal Reading |
12-15V |
| Function Being Checked |
N/A |
| Procedure |
Above 3000 RPM |
| Condition |
After Warm-Up |
| Normal Reading |
OV |
| Terminal No. |
B4 |
| 10 |
| Function Being Checked |
Pressure Sensor |
| Procedure |
Ignition Switch "ON and OFF" |
| Condition |
Engine Stopped |
| Normal Reading |
1.5-2.6V |
| Procedure |
Idling |
| Condition |
Engine Stopped |
| Normal Reading |
0.2-1.2V |
| Terminal No. |
A17 |
| 11 |
| Function Being Checked |
Spark Retard Signal |
| Procedure |
Idling |
| Condition |
N/A |
| Normal Reading |
Over 4V |
| Terminal No. |
B6 |
| 12 |
| Function Being Checked |
Secondary Air Control |
| Procedure |
Idling |
| Condition |
Water Temp. Above 131°F(55°C) |
| Normal Reading |
0-12-15V |
| Function Being Checked |
Secondary Valve |
| Procedure |
Idling |
| Condition |
Water Temp. Above 131°F (55°C) |
| Normal Reading |
In 30 sec. |
| Terminal No. |
B11 |