STEP 1. Using scan tool (M.U.T.-III), check data list item 52: Fuel Tank Differential Pressure Sensor.
caution | To 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) Disconnect the hose B from the evaporative emission canister.
(3) Plug the disconnected end of hose B.
(4) Turn the ignition switch to the "ON" position.
(5) Remove the fuel cap.
(6) Set scan tool (M.U.T.-III) to the data reading mode for item 52, Fuel Tank Differential Pressure Sensor.- Output voltage should be between 1,500 to 3,500 mV.
(7) Connect the evaporative emission system pressure pump (Miller number 6872A) to the fuel tank filler tube by using fuel tank adapter (MLR-8382) and pressurize the fuel tank.- The fuel tank pressure reading should increase.
(8) Turn the ignition switch to the "LOCK" (OFF) position.
(9) Remove the evaporative emission system pressure pump (Miller number 6872A) and the fuel tank adapter (MLR-8382), and reinstall the fuel cap.
(10) Connect hose B to the evaporative emission canister.
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 .