Skewed Sensor Test
- Ignition OFF, remove the vacuum source from the MAP sensor.
- Ignition ON, observe and record the scan tool MAP sensor pressure parameter. This is the first MAP sensor reading.
- With the J 23738-A or J 35555 apply 17 kPa (5 inches Hg) of vacuum to the MAP sensor. Observe and record the scan tool MAP sensor pressure parameter. This is the second MAP sensor reading.
- Subtract the second MAP sensor reading from the first MAP sensor reading. Verify that the vacuum decrease is within 4 kPa (1 inch Hg) of the applied vacuum.
- If the vacuum decrease is not within the specified range, replace the MAP sensor.
- With the J 23738-A or J 35555 apply 34 kPa (10 inches Hg) of vacuum to the MAP sensor. Observe and record the scan tool MAP sensor pressure parameter. This is the third MAP sensor reading.
- Subtract the third MAP sensor reading from the first MAP sensor reading. Verify that the vacuum decrease is within 4 kPa (1 inch Hg) of the applied vacuum.
- If the vacuum decrease is not within the specified range, replace the MAP sensor.