Fuel Temperature Sensor Check
Precautions: General safety (00)
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B3: | Fuel heater relay drive circuit | 3. | Fuel heater |
| A1: | Fuel temperature sensor signal circuit | C1: | Fuel heater power supply circuit | 4. | Fuel heater relay |
| A2: | Fuel temperature sensor ground circuit | C2: | Fuel heater ground circuit | 5. | “FUEL HTR” fuse |
| B1: | Fuel heater relay power supply circuit (coil side) | 1. | ECM | ||
| B2: | Fuel heater relay power supply circuit (switch side) | 2. | Fuel temperature sensor |
Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Parameter check
1)When ignition is “OFF”, connect SUZUKI scan tool to DLC.
2)Start engine, warm it up to normal operating temperature, and then check that “Fuel Temperature” displayed on SUZUKI scan tool is between environmental temp. to 95 °C (203 °F).
Is check result OK?
|
End.
|
Go to Step 2.
|
| 2 |
Fuel temperature sensor signal circuit and ground circuit check
1)When ignition is “OFF”, disconnect “E01” connector from ECM and fuel temperature sensor connector.
2)Check for proper terminal connection to “E01” connector and fuel temperature sensor connector.
3)If connections are OK, check the following points.
•Resistance of “A1” and “A2” circuits: less than 1 Ω
•Resistance between each of “A1” and “A2” circuit and ground: infinity •Resistance between “A1” circuit terminal and other terminal at fuel temperature sensor connector: infinity •Resistance between “A2” circuit terminal and other terminal at fuel temperature sensor connector: infinity •Voltage of “A1” and “A2” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 3.
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Repair defective wire harness.
|
| 3 |
Fuel temperature sensor check
1)Check fuel temperature sensor.
Is check result OK?
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Replace ECM and recheck parameter.
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Replace fuel filter assembly.
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