DTC P0183: Fuel Tank Temperature Sensor Circuit High Input

CIRCUIT OPERATION
• 5-volt voltage is applied to the fuel tank temperature sensor output terminal (terminal No. 3) from the ECM (terminal No. 77) <M/T> or PCM (terminal No. 51) <A/T> via the resistor in the ECM <M/T> or PCM <A/T>.
• The fuel tank temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases. The ground terminal (terminal No. 2) is grounded to the vehicle body.
TECHNICAL DESCRIPTION
• The fuel tank temperature sensor converts the fuel tank temperature to a voltage.
• The ECM <M/T> or PCM<A/T> detects the fuel tank temperature in the fuel tank with this output voltage.
DESCRIPTIONS OF MONITOR METHODS
• An open circuit is detected while monitoring the fuel tank temperature sensor output.
MONITOR EXECUTION
Continuous
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
• Not applicable

Sensor (The sensor below is determined to be normal)
• Engine coolant temperature sensor
• Intake air temperature sensor
DTC SET CONDITIONS Logic Flow Chart


Check Condition
2 seconds or more have passed since the starting sequence was completed.

Judgement Criterion
• Fuel tank temperature sensor output voltage has continued to be 4.6 volts or higher for 2 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 19 .
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:
• Fuel tank temperature sensor failed.
• Open or shorted fuel tank temperature sensor circuit, or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>