P2027

DTC P2027: EVAP Fuel Vapor Temp. Sensor Circuit High Voltage

Wiring Diagram










DTC Detecting Condition and Trouble Area






DTC Confirmation Procedure

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Check DTC and pending DTC.

Troubleshooting

WARNING:

In order to reduce risk of fire and personal injury, this work must be performed in a well ventilated area and away from any open flames such as a gas hot water.

1.
Was "Engine System Check" performed?
YES
Go to Step 2.
NO
Go to Engine System Check Engine System Check.

2. Check fuel tank pressure and temp. sensor circuit.

Connect scan tool to DLC with ignition switch OFF.
Turn ON ignition switch.
Check fuel tank temperature displayed on scan tool.

Is -42 °C (-44 °F) indicated?
YES
Go to Step 3.
NO
Intermittent trouble. Check for intermittent referring to Intermittent and Poor Connection Inspection.

3. Check fuel tank pressure and temp. sensor circuit for open.

Turn OFF ignition switch.
Disconnect connectors from ECM.
Check for proper connection to ECM at applicable terminal.
If connection is OK, check that there is continuity between terminal "G04-22" and terminal "C46-27".

Is there continuity?
YES
Go to Step 4.
NO
Go to Step 6.

4. Check fuel tank pressure and temp. sensor circuit for power short.

Turn ON ignition switch.
Measure voltage between terminal "G04-22" and body ground.

Is voltage 0 V?
YES
Go to Step 5.
NO
"LT GRN" wire shorted to other circuit.

5. Check ECM voltage in fuel tank pressure and temp. sensor circuit.

Remove ECM.
Connect connectors to ECM.
Disconnect fuel tank pressure and temp. sensor connector.
Check poor connection to fuel tank pressure and temp. sensor at all terminals.
Turn ON ignition switch.
Check voltage between terminal "G04-22" and terminal "C46-27".

Is voltage 4 - 5 V?
YES
Go to Step 6.
NO
"LT GRN" wire shorted to other circuit. If "LT GRN" wire is OK, substitute a known-good ECM and recheck.

6. Check fuel tank pressure and temp. sensor for performance.

Turn OFF ignition switch.
Remove fuel tank from vehicle body according to procedure described in Fuel Tank Removal and Installation Fuel Tank Removal and Installation.
Check fuel tank pressure and temp. sensor for performance referring to Fuel Tank Pressure and Temp. Sensor Inspection Fuel Tank Pressure and Temp. Sensor Inspection.

Is check result satisfactory?
YES
Go to Step 7.
NO
Replace fuel tank pressure and temp. sensor.

7. Check fuel tank pressure and temp. sensor circuit high resistance.

Disconnect connectors from ECM.
Connect disconnected fuel tank pressure and temp. sensor connector.
Using service wire, short between "LT GRN" and "ORN" terminals in fuel tank pressure and temp. sensor connector.

Is resistance less than 5 ohms?
YES
Substitute a known-good ECM and recheck.
NO
High resistance in "LT GRN" or "ORN" wire circuit.