IAT Sensor-1 Check
Precautions: General safety (00)
Circuit Diagram
| [A]: | ECM connector (View: [a]) | A3: | MAF sensor ground circuit | 2. | MAF sensor |
| A1: | MAF sensor power supply circuit | B1: | IAT sensor-1 signal circuit | 3. | IAT sensor-1 |
| A2: | MAF sensor signal circuit | 1. | ECM |
Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Parameter check
1)When ignition is “OFF”, 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 “IAT1” is under environmental temperature –5 °C (–9 °F) to environmental temperature +40 °C (72 °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-1 signal circuit and MAF sensor ground check
1)When ignition is “OFF”, disconnect “E01” connector from ECM and MAF sensor with IAT sensor-1 connector.
2)Check for proper terminal connection to “E01” connector and MAF sensor with IAT sensor-1 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 MAF sensor with IAT sensor-1 connector: infinity •Resistance between “A3” circuit terminal and other terminal at MAF sensor with IAT sensor-1 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-1 check
1)Check IAT sensor-1.
Is check result OK?
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Replace ECM and recheck parameter.
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Replace MAF sensor with IAT sensor-1.
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