Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT FUEL CUT OPERATION

(a) Start the engine and warm it up.

(b) Increase the engine speed to at least 3500 rpm.

(c) Use a sound scope to check for fuel injector assembly operation noise.

(d) Check that when the accelerator pedal is released, fuel injector assembly operation noise stops momentarily, and then resumes.

If the result is not as specified, check the fuel injector assembly, wiring and ECM.

2. VISUALLY INSPECT HOSES, CONNECTIONS AND GASKETS

(a) Check that there are no cracks, leaks or damage.

NOTICE:

  • Detachment or other problems with the engine oil level dipstick, oil filler cap sub-assembly, PCV hose and other components may cause the engine to run improperly.
  • Air suction caused by disconnections, looseness or cracks in the parts of the air induction system between the throttle body with motor assembly and cylinder head sub-assembly, cylinder head LH will cause engine failure or engine malfunctions.

If the result is not as specified, replace parts as necessary.

3. INSPECT EVAPORATIVE EMISSION CONTROL SYSTEM

(a) Connect the Techstream to the DLC3.

(b) Remove the V-bank cover sub-assembly.

(c) Slide the hose clip and disconnect the purge line hose from the purge VSV.

(d) Start the engine and turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.

OK:

Tester Operation

Specified Condition

EVAP VSV: OFF

Purge VSV has no suction

EVAP VSV: ON

Purge VSV has suction

(f) Connect the purge line hose to the purge VSV, and slide the hose clip to secure it.

(g) Install the V-bank cover sub-assembly.

4. INSPECT FUEL CUTOFF VALVE AND FILL CHECK VALVE

(a) Remove the fuel tank assembly.

Click here

(b) Connect the pressure gauge to the vent hose port.

Text in Illustration

*1

Pressure Gauge

(c) Install the fuel tank assembly with the fuel tank vent hose disconnected.

(d) Fill the fuel tank assembly with fuel.

(e) Apply pressure at 4 kPa (41 kgf/cm2, 0.58 psi) to the vent port of the fuel tank assembly.

HINT:

Check the amount of fuel left in the fuel tank assembly.

(f) Remove the fuel tank cap assembly, and check that the pressure decreases.

If the pressure does not decrease, replace the fuel tank assembly.

Text in Illustration

*1

Fuel Tank Cap Assembly

(g) Reconnect the fuel tank vent hose to the fuel tank assembly.

5. INSPECT AIR INLET LINE

(a) Disconnect the fuel tank vent hose from the charcoal canister assembly.

Push

(1) Push the fuel tank vent hose deep inside.

(2) Pinch portion A to disconnect the fuel tank vent hose from the charcoal canister assembly as shown in the illustration.

NOTICE:

  • Remove any dirt and foreign objects from the fuel tank vent hose connector before performing the work.
  • Do not allow any scratches or foreign objects on the parts when disconnecting, as the fuel tank vent hose connector has the O-ring that seals the pipe.
  • Perform the work by hand. Do not use any tools.
  • Do not forcibly bend, twist or turn the nylon tube.
  • Protect the disconnected part by covering it with a vinyl bag after disconnecting the fuel tank vent hose.
  • If the fuel tank vent hose connector and pipe are stuck, push and pull them to release.

*1

Fuel Tank Vent Hose Retainer

*2

Fuel Tank Vent Hose Connector

*3

O-ring

Pinch

Pull

(b) Check that air flows freely into the fuel tank vent hose.

If air cannot flow freely into the fuel tank vent hose, repair or replace the fuel tank vent hose.

*1

Fuel Tank Vent Hose

*a

Air

(c) Reconnect the fuel tank vent hose to the charcoal canister assembly.

(1) Align the fuel tank vent hose connector with the charcoal canister assembly, then push in the fuel tank vent hose until the retainer makes a "click" sound to connect the fuel tank vent hose to the charcoal canister assembly.

NOTICE:

  • Check that there are no scratches or foreign objects on the disconnected parts of the fuel tank vent hose and charcoal canister assembly before performing the work.
  • After connecting the fuel tank vent hose, check that the fuel tank vent hose is securely connected by pulling the quick connector.
Emission Control System
...

Parts Location
PARTS LOCATION ILLUSTRATION *1 FUEL TANK CAP ASSEMBLY *2 CHARCOAL CANISTER ASSEMBLY *3 CHARCOAL CANISTER LEAK DETECTION PUMP ...

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