P0183

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION
The fuel temperature sensor is a thermistor that controls signal voltage to the Powertrain Control Module (PCM). When the fuel is cold, the sensor resistance is high, therefore the PCM will see high signal voltage. As fuel warms, sensor resistance becomes less and voltage drops. The fuel temperature sensor is integrated with the optical sensor. This is a type B DTC.

CONDITIONS FOR SETTING THE DTC
- Engine operating for 8 minutes.
- Fuel temperature less than or equal to 17°C (63°F).
- Conditions met for 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
Poor idle quality during hot conditions.

CONDITIONS FOR CLEARING THE MIL/DTC
- The PCM will turn the MIL oft after three consecutive trips without a fault condition.
- A History DTC will clear when forty consecutive warm-up cycles that the diagnostic does not fail (coolant temperature has risen 5°C (40°F) from start up coolant temperature and engine coolant temperature exceeds 71°C (16O°F) that same ignition cycle.

DIAGNOSTIC AIDS
A scan tool reads fuel temperature in degrees centigrade. After engine is started, the temperature should rise steadily. A faulty connection, or an open in the signal circuit.

TEST DESCRIPTION
Number(s) below refer to the Step number(s) on the Diagnostic Table.

2. This Step determines if DTC P0183 is a hard failure or an intermittent condition.
3. This test simulates a DTC P0182. If the PCM recognizes the low signal voltage (high temp) the PCM and wiring are OK.
4. This test will determine if signal circuit is open. There should be 5 volts at sensor connector if measured with J 392O0-DVM. This will determine if there is a wiring problem or a faulty PCM.