P0182
Fuel Temperature Sensor Circuit:
Connectors:
CIRCUIT OPERATION
- 5-volt voltage is applied to the fuel temperature sensor output terminal (terminal 3) from the ECM (terminal 77)
- The fuel temperature sensor output voltage increases when the resistance increases and decreases when the resistance decreases. The ground terminal (terminal 2) is grounded to the vehicle body.
TECHNICAL DESCRIPTION
- The fuel temperature sensor converts the fuel temperature to a voltage.
- The ECM
DTC SET CONDITIONS
Check Conditions
- 2 seconds or more have passed since the starting sequence was completed.
Judgement Criteria
- Fuel temperature sensor output voltage has continued to be 0.1 volt or lower for 2 seconds.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Fuel temperature sensor failed
- Open or shorted fuel temperature sensor circuit, or loose connector.
- ECM failed.
- PCM failed.
DIAGNOSIS
Required Special Tools
- MB991502: Scan Tool (MUT-II)
STEP 1. Using scan tool MB991502, check data list item 4A: Fuel Temperature Sensor.
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector
2. Turn the ignition switch to the "ON" position.
3. Set scan tool MB991502 to the data reading mode for item 4A, Fuel Temperature Sensor.
- Approximately the same as the outside temperature when the engine is cooled.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES: It can be assumed that this malfunction is intermittent. Refer to How to Use Troubleshooting/Inspection Service Points.
NO: Go to Step 2.
STEP 2. Check the fuel temperature sensor.
1. Disconnect the fuel temperature sensor connector D-10
2. Measure the resistance between terminal 2 and 3 of the fuel temperature sensor
Standard value: 0.5 - 12.0 kohm
Q: Is the resistance at the standard value?
YES: Go to Step 3.
NO: Replace the fuel temperature sensor Then go to Step 5.
STEP 3. Check connector D-10 at the fuel temperature sensor and connector C-115 at ECM
Q: Is the connector in good condition?
YES: Go to Step 4.
NO: Repair or replace it. Refer to Harness Connector Inspection. Then go to Step 5.
STEP 4. Check for short circuit to ground between fuel temperature sensor connector D-10 and ECM connector C-115
NOTE: Check harness after checking intermediate connector C-122 C-127 and D-14. If intermediate connector are damaged, repair or replace it. Refer to Harness Connector Inspection. Then go to Step 5.
Q: Is the harness wire in good condition?
YES: Replace the ECM or PCM. Then go to Step 5.
NO: Repair it. 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, Procedure 6 Other Monitor.
2. Check the diagnostic trouble code (DTC).
Q: Is the DTC P0182 output?
YES: Retry the troubleshooting.
NO: The inspection is complete.