SAAB WIS ONLINE

DTC P0183 FUEL TEMPERATURE SENSOR “A” CIRCUIT HIGH INPUT

DTC P0183 FUEL TEMPERATURE SENSOR “A” CIRCUIT HIGH INPUT

DTC DETECTING CONDITION:


• Immediately at fault recognition

• GENERAL DESCRIPTION


Important

After repair or replacement of faulty parts, conduct Clear Memory Mode and Inspection Mode .


WIRING DIAGRAM:


CHECK CURRENT DATA.

Start the engine.

Read the data of fuel temperature sensor signal using Vehicle Diagnostic Interface or OBD-II general scan tool.

Note
• Vehicle Diagnostic Interface

For detailed operation procedures, refer to “READ CURRENT DATA FOR ENGINE”.

• OBD-II general scan tool

For detailed operation procedures, refer to the OBD-II General Scan Tool Instruction Manual.


Is the temperature less than −40°C (−40°F)?

Yes


No

• Repair poor contact.

•
Note

In this case, repair the following:

• Poor contact in fuel pump connector

• Poor contact in ECM connector

• Poor contact in coupling connector

• Poor contact in joint connector



CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.

Turn ignition switch to OFF.

Remove the access hole lid.

Disconnect the connector from fuel pump.

Measure the voltage between fuel pump connector and chassis ground.

Connector & terminal

(R58) No. 6 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes

Repair short circuit to battery in harness between ECM and fuel pump connector.


No


CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.

Turn ignition switch to ON.

Measure the voltage between fuel pump connector and chassis ground.

Connector & terminal

(R58) No. 6 (+) — Chassis ground (−):

Is the voltage more than 10 V?

Yes

Repair short circuit to battery in harness between ECM and fuel pump connector.


No


CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.

Measure the voltage between fuel pump connector and chassis ground.

Connector & terminal

(R58) No. 6 (+) — Chassis ground (−):

Is the voltage more than 4 V?

Yes


No

• Repair harness and connector.

•
Note

In this case, repair the following:

• Open circuit in harness between ECM and fuel pump connector

• Poor contact in fuel pump connector

• Poor contact in ECM connector

• Poor contact in coupling connector



CHECK HARNESS BETWEEN FUEL TEMPERATURE SENSOR AND ECM CONNECTOR.

Turn ignition switch to OFF.

Disconnect the connector from ECM.

Measure the resistance of harness between fuel pump connector and ECM.

Connector & terminal

(R58) No. 5 — (B135) No. 19:

Is the resistance less than 1 Ω?

Yes

Replace the fuel temperature sensor.


No

• Repair harness and connector.

•
Note

In this case, repair the following:

• Open circuit in harness between ECM and fuel pump connector

• Poor contact in fuel pump connector

• Poor contact in ECM connector

• Poor contact in coupling connector

• Poor contact in joint connector