2002 Toyota Tacoma Evaporative Emission (Evap) Control System Inspection

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1. Inspect lines and connections visually check for loosen connections, sharp bends or damage. 2. Inspect fuel tank visually check for deformation, cracks or fuel leakage. 3. Inspect fuel tank cap visually check if the cap and/or gasket are deformed or dam- aged. If necessary, repair or replace the cap. 4. (a) inspect evap system line warm up the engine and stop the engine. Allow the engine to warm up to normal operating tempera- ture. Install a vacuum gauge (evap control system test equip- ment vacuum gauge) to the evap service port on the purge line.

(b) (c) toyota hand−held tester: forced driving of the vsv for the evap. (1) connect a toyota hand−held tester to the dlc3. (2) start the engine. (3) push the toyota hand−held tester main switch on. (4) use the active test mode on the toyota hand−held tester to operate the vsv for the evap. (d) if you have no toyota hand−held tester: forced driving of the vsv for the evap. (1) disconnect the vsv connector for the evap. (2) connect the positive (+) and negative (−) leads from the battery to the vsv terminals for the evap.

(3) start the engine. (e) check the vacuum at idle. Vacuum: maintain at 0.368 − 19.713 in.Hg (5 − 268 in.Aq) for over 5 seconds hint: if the vacuum does not change, you can conclude that the hose connecting the vsv to the service port has come loose or is blocked, or the vsv is malfunctioning. (f) toyota hand−held tester: conclude forced driving of the vsv for the evap. (1) stop the engine. (2) disconnect the toyota hand−held tester from the dlc3. (g) if you have no toyota hand−held tester: conclude forced driving of the vsv for the evap. (1) stop the engine. (2) disconnect the positive (+) and negative (−) leads from the battery from the vsv terminals for the evap. (3) connect the vsv connector for the evap. (h) disconnect the vacuum gauge from the evap service port on the purge line. (i) connect a pressure gauge to the evap service port on the purge line.

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