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DTC P0182: Fuel Tank Temperature Sensor Circuit Low Input
 
 
 
 
CIRCUIT OPERATION
  • 5-volt voltage is applied to the fuel tank temperature sensor output terminal from the ECM terminal F/TM via the resistor in the ECM.
  • The fuel tank temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases. The ground terminal is grounded to the vehicle body.
 
 
TECHNICAL DESCRIPTION
  • The fuel tank temperature sensor converts the fuel tank temperature to a voltage.
  • The ECM detects the fuel tank temperature with this output voltage.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • Fuel tank temperature sensor output voltage is out of specified range.
 
 
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)
  • Not applicable
 
 
DTC SET CONDITIONS
Logic Flow Chart
 
 
Check Condition
  • 2 seconds or more have passed since the engine starting sequence was completed.
Judgment Criterion
  • Sensor output voltage has continued to be 0.1 volt or lower for 2 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • None
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be stored are: )
  • Fuel tank temperature sensor failed.
  • Shorted fuel tank temperature sensor circuit, or connector damage.
  • ECM failed.

 
 
DIAGNOSIS
Required Special Tools:
  • MB992744: Vehicle Communication Interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite Main Harness A
  • MB992747: V.C.I.-Lite USB Cable Short
  • MB992748: V.C.I.-Lite USB Cable Long
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: Vehicles Communication Interface (V.C.I.)
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)
STEP 1. Using scan tool (M.U.T.-III), check data list item 53: Fuel Tank Temperature Sensor.
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
(1) Connect scan tool (M.U.T.-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) .
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool (M.U.T.-III) to the data reading mode for item 53, Fuel Tank Temperature Sensor.
  • Approximately the same as the ambient air temperature when the engine is cooled.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Go to Step 2.
 
STEP 2. Check the fuel tank temperature sensor.
Refer to GROUP 13C, On-vehicle Service - Fuel Tank Temperature Sensor Check .
Is the measured resistance normal?
Go to Step 3.
Replace the fuel pump module. Then go to Step 5.
 
STEP 3. Check of short circuit to ground in F/TM line between fuel pump module connector and ECM connector.
Is the harness wire in good condition?
Go to Step 4.
Repair the connector(s) or wiring harness. Then go to Step 5.
 
STEP 4. Using scan tool (M.U.T.-III), check data list item 53: Fuel Tank Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool (M.U.T.-III) to the data reading mode for item 53, Fuel Tank Temperature Sensor.
  • Approximately the same as the ambient air temperature when the engine is cooled.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Is the sensor operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Replace the ECM (Refer to, Removal and Installation ). Then go to Step 5.
 
STEP 5. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 23 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0182 stored?
Retry the troubleshooting.
The inspection is complete.