Trouble Code 23 - Pressure Sensor (SSHU 0193-03)
Publication date: 1993-01-01Reference number: SSHU 0193-03
TROUBLE CODE 23 - PRESSURE SENSOR
TECHNICAL SERVICE BULLETIN
Reference Number(s): SSHU 0193-03, Date of Issue:
January 1993
JUSTY TROUBLE CODE "23" PRESSURE SENSOR
Model(s): 1987-93 Subaru Justy
Group: Electrical
No.: SSHU 193-03
Date: January 1993
SERVICE INFORMATION
If you encounter Trouble Code "23" in ECU memory and no wiring problems are found, use the following diagnostic information to test the pressure sensor:
- Disconnect the vacuum line at the pressure sensor and install a hand-held vacuum tester.
- With ignition "ON"/Engine "OFF" verify that the RY wire has power and BR is a good ground.
PRESSURE SENSOR VOLTAGE OUTPUT
PRESSURE SENSOR VOLTAGE OUTPUT
| Vacuum Applied | Voltage Output |
|---|---|
| O in Hg. | 3.6 V |
| 10 in Hg. | 2.6 V |
| 15 in Hg. | 2.1 V |
| 20 in Hg. | 1.6 V |
| 25 in Hg. | 1.1 V |
| 27 in Hg. | O.9 V |
|
NOTE:
Any erratic higher voltages or lower voltages including zero indicates the sensor needs to be replaced.
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