DTC Troubleshooting: P0183 (185-2)

DTC P0183: Fuel Temperature Sensor Circuit High Voltage

1. Turn the ignition switch ON (II).

1. Check the FUEL TEMPERATURE SENSOR in the DATA LIST with the HDS.

Is about 4.95 V or higher indicated?

YES | - | Go to Step 3 .
NO | - | Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the fuel temperature sensor and the ECM.■

1. Turn the ignition switch OFF.

1. Disconnect the fuel temperature sensor 2P connector.

1. Connect fuel temperature sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.

1. Turn the ignition switch ON (II).

1. Check the FUEL TEMPERATURE SENSOR in the DATA LIST with the HDS.

Is about 4.95 V or higher indicated?

YES | - | Go to Step 8 .
NO | - | Go to Step 18 .

1. Remove the jumper wire from the fuel temperature sensor 2P connector.

1. Measure voltage between fuel temperature sensor 2P connector terminal No. 2 and body ground.

Is there about 5 V?

YES | - | Go to Step 10 .
NO | - | Go to Step 14 .

1. Turn the ignition switch OFF, and wait 30 seconds.

1. Disconnect ECM connector No. 1 (96P).

1. Connect fuel temperature sensor 2P connector terminal No. 1 to body ground with a jumper wire.

1. Check for continuity between ECM connector No. 2 terminal No. 21 and body ground.

Is there continuity?

YES | - | Go to Step 24 .
NO | - | Repair open in the wire between the fuel temperature sensor and ECM connector No. 2 terminal No. 21, then go to Step 20 .

1. Turn the ignition switch OFF, and wait 30 seconds.

1. Disconnect ECM connector No. 1 (96P).

1. Connect fuel temperature sensor 2P connector terminal No. 2 to body ground with a jumper wire.

1. Check for continuity between ECM connector No. 2 terminal No. 10 and body ground.

Is there continuity?

YES | - | Go to Step 24 .
NO | - | Repair open in the wire between the fuel temperature sensor and ECM connector No. 2 terminal No. 10, then go to Step 20 .

1. Turn the ignition switch OFF.

1. Replace the fuel temperature sensor.

1. Reconnect all connectors.

1. Turn the ignition switch ON (II).

1. Reset the ECM with the HDS.

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

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P0183 is indicated, check for poor connections or loose terminals at the fuel temperature sensor and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Troubleshooting is complete.■

1. Update the ECM if it does not have the latest software, or substitute a known-good ECM.

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

Are any Temporary DTCs or DTCs indicated?

YES | - | If DTC P0183 is indicated, check for poor connections or loose terminals at the fuel temperature sensor and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM. ■