- a) Disconnect the sensor connector.
- b) Turn on the ignition.
Using a voltmeter, measure the voltage between the sensor connector terminals: "VC" (terminal "VCC" - 3S-GE) and "E2". Nominal voltage:
- 3S-FE, 4A-FE, 4S-FE - 4.6-5.5 V
- 3S-GE, 5E-FE — 4.0-6.0 V
- 7A-FE (at idle) — 5.0 V
Sensor diagram and its connection diagram: 1 - absolute pressure sensor in the intake manifold, 2 - electronic control unit, 3 measuring chamber, 4 - filter, 5 - electrical contact, 6 - from the intake manifold
(The original is published on the website: «www.toyotaman.ru»)
3S-FE, 4A-FE, 4S-FE and 7A-FE | 
3S-GE, 5E-FE |
2. Check the output signal of the absolute pressure sensor.
- a) Turn on the ignition.
- b) Disconnect the vacuum hose from the intake manifold.
- c) Connect a voltmeter to the terminals "P1M" and "E2" of the electronic control unit connector and measure the output signal voltage at atmospheric pressure. The nominal voltage of 7A-FE is 3.6 V.
- d) Stepwise apply a vacuum to the sensor within the range of 13.3 kPa (100 mmHg.) up to 66.7 kPa (500 mmHg.).
- d) Measure the decrease in voltage for each vacuum value.
| Vacuum, kPa (mmHg) | Voltage drop, V |
| 13,3 (100) | 0,3-0.5 |
| 26,7 (200) | 6,7-0,9 |
| 40,0 (300) | 1,1-1,3 |
| 53,3 (400) | 1.5-1.7 |
| 66,7 (500) | 1,9-21 |