LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 1989 >> Celica ST, Standard >> Repair and Diagnosis >> Engine Performance >> System >> System/Component Tests - EFI >> Turbocharging Pressure Sensor Test

Turbocharging Pressure Sensor Test

  1. To check power source, turn ignition on. Unplug turbocharging pressure sensor. Measure voltage between terminals "VC" and "E2" of harness connector. Voltage should be 4-6 volts.
  2. To check power output, turn ignition on. Unplug turbocharging pressure sensor vacuum hose from intake manifold. Connect voltmeter to Black/White and Black/Yellow wire terminals ("PIM" and "E2") of ECU connector and measure output voltage under ambient atmospheric pressure.
    Fig 1: Measuring Voltage To Turbocharging Pressure Sensor
    G95411Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Attach a vacuum pump to turbocharging pressure sensor vacuum hose and apply vacuum in specified stages. See Fig 2. Measure and record voltage readings for each stage of applied vacuum. See VACUUM/VOLTAGE SPECIFICATIONS table. Replace sensor if readings are not within specifications.
Fig 2: Cut-Away View of the Turbocharging Pressure Sensor
G118913Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
VACUUM/VOLTAGE SPECIFICATIONS

Applied Vacuum In. Hg Volts
3.94 .15-.35
7.87 .40-.60
11.81 .65-.85
15.75 .90-1.10
19.69 1.15-11.35
scientia non olet · About LEMON Manuals