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Home >> Suzuki >> 1992 >> Samurai JA >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Engine Sensors & Switches >> Pressure Sensor
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Pressure Sensor

  1. Sensor is mounted to right center of firewall. To test pressure sensor on vehicle, turn ignition on. Connect voltmeter between ground and indicated ECM connector terminal (backprobe ECM terminal). See PRESSURE SENSOR OUTPUT VOLTAGE (ON-VEHICLE)  table.
  2. If voltage is not within specification, see CODE 31 or 32 in TESTS W/CODES article in this section. To bench test pressure sensor, see PRESSURE SENSOR OUTPUT VOLTAGE (OFF-VEHICLE)  table. If voltage is not within specification, replace pressure sensor.
PRESSURE SENSOR OUTPUT VOLTAGE (ON-VEHICLE)

Altitude (Feet) Vacuum (In. Hg) (1) Output Voltage
0 30 3.6-4.4
1000 29 3.5-4.2
2000 28 3.4-4.1
3000 27 3.2-4.0
4000 26 3.1-3.8
5000 25 3.0-3.7
6000 24 2.9-3.6
7000 23 2.8-3.4
8000 22 2.7-3.3
9000 21 2.6-3.2
10,000 20 2.5-3.1
(1) Check output voltage at ECM connector terminal A22 (Gray/Green wire). See ECM LOCATION table. Before checking output voltage, ensure ECM supply voltage is 4.75-5.25 volts at ECM connector terminal A23 (Gray/Red wire).
PRESSURE SENSOR OUTPUT VOLTAGE (OFF-VEHICLE)

Altitude (Feet) Vacuum (In. Hg) (1)(2) Output Voltage
0 30 3.4-3.8
1000 29 3.3-3.7
2000 28 3.1-3.6
3000 27 3.0-3.5
4000 26 2.9-3.3
5000 25 2.8-3.2
6000 24 2.7-3.1
7000 23 2.6-3.0
8000 22 2.5-2.9
9000 21 2.4-2.8
10,000 20 2.3-2.7
(1) Pressure sensor output voltage is tested with three 1.5-volt batteries connected in series. Positive lead is connected to Gray/Red wire terminal. Connect negative lead to Gray/Yellow wire terminal.
(2) Output voltage is checked at Gray/Green wire terminal.
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