IAT Sensor-2 Check
Precautions: General safety (00)
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A3: | Boost pressure sensor ground circuit | 2. | Boost pressure sensor |
| A1: | Boost pressure sensor power supply circuit | B1: | IAT sensor-2 signal circuit | 3. | IAT sensor-2 |
| A2: | Boost pressure sensor signal circuit | 1. | ECM |
Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Parameter check
1)When ignition is “ON”, connect SUZUKI scan tool to DLC.
2)Start engine and warm it up to normal operating temperature.
3)With engine at idle speed, all electrical loads turned off and accelerator pedal not depressed, check that “IAT2” is environmental temperature to environmental temperature +60 °C (108 °F).
Is check result OK?
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End.
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Go to Step 2.
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| 2 |
IAT sensor-2 signal circuit and boost pressure sensor ground check
1)When ignition is “OFF”, disconnect “D01” connector from ECM and boost pressure sensor with IAT sensor-2 connector.
2)Check for proper terminal connection to “D01” connector and boost pressure sensor with IAT sensor-2 connector.
3)If connections are OK, check the following points.
•Resistance of “B1” and “A3” circuits: less than 1 Ω
•Resistance between each of “B1” and “A3” circuits and ground: infinity •Resistance between “B1” circuit terminal and other terminal at boost pressure sensor with IAT sensor-2 connector: infinity •Resistance between “A3” circuit terminal and other terminal at boost pressure sensor with IAT sensor-2 connector: infinity •Voltage of “B1” and “A3” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
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Go to Step 3.
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Repair or replace defective wire harness.
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| 3 |
IAT sensor-2 check
1)Check IAT sensor-2.
Is check result OK?
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Replace ECM and recheck parameter.
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Replace boost pressure sensor with IAT sensor-2.
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