Honda Civic. Manual — part 658

1. Turn the ignition switch ON (II).
2. Note the ambient temperature.
3. Check the IAT SENSOR in the DATA LIST with the HDS.
4. Compare the value of the IAT SENSOR and the ambient temperature.

Is the value of the IAT SENSOR and the ambient temperature same?

YES -Go to step 5.

NO -Allow the IAT SENSOR to cool to ambient temperature, then go to step
5.

5. Note the value of the FUEL TEMPERATURE SENSOR in the DATA LIST

with the HDS.

6. Compare the value of the IAT SENSOR and the value of the FUEL

TEMPERATURE SENSOR.

Does the value of the FUEL TEMPERATURE SENSOR differ 45 °F (25 °C) or
more?

YES -Go to step 7.

NO -Intermittent failure, the system is OK at this time. Check for poor
connections or loose terminals at the fuel temperature sensor and the PCM.

7. Replace the fuel temperature sensor (see FUEL TEMPERATURE SENSOR

REPLACEMENT ).

8. Reset the PCM with the HDS.
9. Do the PCM idle learn procedure, refer to the ECM/PCM IDLE LEARN

PROCEDURE .

10. Allow the IAT SENSOR to cool to ambient temperature.

NOTE:

Before you troubleshoot, record all freeze data and any on-
board snapshot, and review the general troubleshooting
information (see GENERAL TROUBLESHOOTING
INFORMATION ).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

11. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or

neutral) until the radiator fan comes on, then let it idle.

12. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0181 indicated?

YES -Check for poor connections or loose terminals at the fuel temperature
sensor and the PCM, then go to step 1.

NO -Go to step 13.

13. Monitor the OBD STATUS for DTC P0181 in the DTCs MENU with the

HDS.

Does the screen indicate PASSED?

YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs
were indicated in step 12, go to the indicated DTC's troubleshooting.

NO -If the screen indicates FAILED, check for poor connections or loose
terminals at the fuel temperature sensor and the PCM, then go to step 1. If the
screen indicates NOT COMPLETED, go to step 10.

DTC P0182: FUEL TEMPERATURE SENSOR CIRCUIT LOW VOLTAGE

1. Turn the ignition switch ON (II).
2. Check the FUEL TEMPERATURE SENSOR in the DATA LIST with the

HDS.

Is about 356 °F (180 °C) or more, or 0.08 V or less indicated?

YES -Go to step 3.

NOTE:

Before you troubleshoot, record all freeze data and any on-
board snapshot, and review the general troubleshooting
information (see GENERAL TROUBLESHOOTING
INFORMATION ).

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

NO -Intermittent failure, the system is OK at this time. Check for poor
connections or loose terminals at the fuel temperature sensor and the PCM.

3. Turn the ignition switch OFF.
4. Disconnect the fuel temperature sensor 2P connector.
5. Turn the ignition switch ON (II).
6. Check the FUEL TEMPERATURE SENSOR in the DATA LIST with the

HDS.

Is about 356 °F (180 °C) or more, or 0.08 V or less indicated?

YES -Go to step 7.

NO -Go to step 11 11.

7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect PCM connector B (44P).

10. Check for continuity between fuel temperature sensor 2P connector terminal

No. 2 and body ground.

Fig. 3: Checking Continuity Between Fuel Temperature Sensor 2P
Connector Terminal No. 2 And Body Ground

Is there continuity?

YES -Repair short in the wire between the PCM (B5) and the fuel temperature
sensor, then go to step 13.

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX

NO -Go to step 18.

11. Turn the ignition switch OFF.
12. Replace the fuel temperature sensor (see FUEL TEMPERATURE SENSOR

REPLACEMENT ).

13. Reconnect all connectors.
14. Turn the ignition switch ON (II).
15. Reset the PCM with the HDS.
16. Do the PCM idle learn procedure, refer to the ECM/PCM IDLE LEARN

PROCEDURE .

17. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0182 indicated?

YES -Check for poor connections or loose terminals at the fuel temperature
sensor and the PCM, then go to step 1.

NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are
indicated, go to the indicated DTC's troubleshooting.

18. Reconnect all connectors.
19. Update the PCM if it does not have the latest software (see UPDATING THE

PCM ), or substitute a known-good PCM (see SUBSTITUTING THE
PCM ).

20. Check for Temporary DTCs or DTCs with the HDS.

Is DTC P0182 indicated?

YES -Check for poor connections or loose terminals at the fuel temperature
sensor and the PCM. If the PCM was updated, substitute a known-good PCM
(see SUBSTITUTING THE PCM ), then recheck. If the PCM was
substituted, go to step 1.

NO -If the PCM was updated, troubleshooting is complete. If the PCM was
substituted, replace the original PCM, refer to the ECM/PCM
REPLACEMENT . If any other Temporary DTCs or DTCs are indicated, go

2008 Honda Civic GX

2006-08 ENGINE PERFORMANCE Fuel Supply System - Civic GX