Highlander 2WD V6-3.3L (3MZ-FE) Hybrid (2006)
Fuel Pressure Release: Service and Repair
PRECAUTION
1. PRECAUTION
a. Before inspecting and repairing the fuel system, disconnect the negative (-) battery cable.
b. Do not smoke or work near fire when handling the fuel system.
c. Keep gasoline away from rubber or leather parts.
2. DISCHARGE FUEL SYSTEM PRESSURE
NOTE:
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Do not disconnect any part of the fuel system until you have discharged the fuel system pressure.
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Even after discharging the fuel pressure, place a shop rag or a piece of cloth over fittings to prevent fuel from splashing on yourself or in the
engine compartment when separating the fittings.
a. When using the intelligent tester:
1. Connect the intelligent tester to the DLC3.
2. Put the vehicle in the "inspection mode".
3. Start the engine.
4. Turn the tester on.
5. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST.
6. Perform the ACTIVE TEST.
7. Turn the fuel pump (C/OPN relay) off.
8. Turn the ignition switch off immediately after the engine comes to a "rough idle state".
NOTE: The hybrid system has a complicated process from "out of gas" to "engine stall". Therefore, "rough idle" is regarded as "stop".
HINT: DTCs P0171/25 and P0174/25 indicating LEAN errors may be detected.
b. When not using the intelligent tester (using C/OPN RLY):
1. Disconnect the relay block No.3.
2. Remove the junction block cover No.2.
3. Remove the C/OPN RLY.
4. Put the vehicle in the "inspection mode".
5. Start the engine.
6. Turn the ignition switch off immediately after the engine comes to a "rough idle state".
NOTE: The hybrid system has a complicated process from "out of gas" to "engine stall". Therefore, "rough idle" is regarded as "stop".
HINT: DTCs P0171/25 and P0174/25 indicating LEAN errors may be detected.
7. Disconnect the negative (-) battery terminal cable.
8. Install the C/OPN RLY.
3. FUEL SYSTEM