FUEL TANK INSPECTION [ZY, Z6]

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Note

•  The two rollover valves built into the fuel tank and check valve (two-way) built into the rollover valves are inspected in this inspection.

1.  Complete the “BEFORE SERVICE PRECAUTION”. (See BEFORE SERVICE PRECAUTION [ZY, Z6].)

2.  Remove the fuel tank and the fuel pump unit as a single unit. (See FUEL TANK REMOVAL/INSTALLATION [ZY, Z6].)

3.  Perform the following procedure to verify the fuel tank airtightness.

(1)  Plug the fuel pump unit pipe, ports B and C.

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(2)  Apply a pressure of 3 kPa {23 mmHg, 0.9 inHg} to port A and wait for a while.

(3)  Verify that there is no air flow leakage from the fuel tank.

•  If there is air flow, replace the fuel tank. (See FUEL TANK REMOVAL/INSTALLATION [ZY, Z6].)

4.  Plug the fuel pump unit pipe and port B.

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5.  Level the fuel tank.

6.  Apply a pressure of 3 kPa {23 mmHg, 0.9 inHg} to port A and wait for a while.

7.  With the pressure still applied, verify that there is air flow port C and the pressure is 0—3 kPa {0—23 mmHg, 0—0.9 inHg}.

•  If there is no air flow, replace the fuel tank. (See FUEL TANK REMOVAL/INSTALLATION [ZY, Z6].)

8.  Apply a pressure of -0.5 kPa {-3.8 mmHg, -0.1 inHg} to port A and wait for a while.

9.  With the pressure still applied, verify that there is air flow port C and the pressure is -0.5—0 kPa {-3.8—0 mmHg, -0.1—0 inHg}.

•  If there is no air flow, replace the fuel tank. (See FUEL TANK REMOVAL/INSTALLATION [ZY, Z6].)

•  If there is air flow, place the fuel tank upside down.

10.  Apply a pressure to port A and wait for a while.

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11.  With the pressure still applied, verify that there is no air flow from port C.

•  If there is air flow, replace the fuel tank. (See FUEL TANK REMOVAL/INSTALLATION [ZY, Z6].)