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Vacuum Switching Valve: Inspection

INSPECT VACUUM SWITCHING VALVE

Measure the VSV resistance.

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Specified Condition
1-2	37 to 44 Ω at 20°C (68°F)
1 - Body ground 2 - Body ground	10 kΩ or higher

If the result is not as specified, replace the VSV.

Fig 1: Measuring VSV Resistance

G04975209

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check VSV operation.
1. When the vacuum is applied to the E port, check that air is sucked into the filter. If the result is not as specified, replace the VSV.
  
  Fig 2: Checking VSV Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage across the terminals. When the vacuum is applied to the F port, check that air is sucked into the E port. If the result is not as specified, replace the VSV.
  
  Fig 3: Checking Air Is Sucked Into E Port
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002