Volvo Workshop Manuals
940 L4-2.3L SOHC VIN 88 B230F (1992)
Sensors and Switches > Sensors and Switches - Powertrain Management > Sensors and Switches - Computers and Control Systems > Manifold Pressure/Vacuum Sensor > Component Information > Specifications > Page 2169
Connect a voltmeter between ground and pin 7.
Reading: approx. 5 volts
If not, check wiring and connectors between pin 11 and intake manifold pressure sensor. Check wiring and connectors between pin 7 and intake
Checking Pin 7 And 11
Connect voltmeter to pin 7 and 11.
Connect a vacuum pump to the pressure sensor.
Apply vacuum to the sensor. Voltage should decrease with increasing vacuum.
Reading at 100 kPa:
approx. 4.4 volts
Reading at 80 kPa:
approx. 3.2 volts
Reading at 60 kPa:
approx. 2.1 volts
Reading at 40 kPa:
approx. 1.1 volts
Reading at 20 kPa:
approx. 0.5 volts
If voltage does not fall, or drop is excessive, replace and retest with new intake manifold pressure sensor.
Turn ignition OFF.
Remove connector from fuel injection ECU.
Remove the #1 fuse and reconnect the ECU connector. Ensure that the rubber seal in the connector is installed before it is connected to the ECU.
Reinstall the #1 fuse.
After testing, disconnect all test equipment, reconnect all connectors, hoses and remount all panels.
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