Code 32 - BARO Sensor
NOTE:
The BARO sensor reacts like a MAP sensor in that it measures highest voltage when barometric pressure is highest.
Code 32 says that the ECM has seen a BARO pressure (measured in volts) too low at term. "1" of the ECM.
NOTE:
The following step numbers refer to the numbers in the accompanying flow chart(s).
- This test checks voltage output at the sensor. Voltage normally falls within the middle range on table.
- This test checks for change in voltage at sensor with reduced barometric pressure (applied vacuum). Normal change should be 1.2-2.3 volts. If change is within specifications, fault is not in sensor, but in wiring or ECM.
- This test determines if fault is in wiring to sensor, ECM connections or ECM.
- Measures output of sensor with circuit open to ECM. This is to determine if the fault is in the circuit to ECM term. "1" or the ECM, as would be the case if the voltage increased in this step.
- Takes the sensor out of the circuit to check for proper 5 volt supply voltage from the ECM. With 5 volt reference voltage, sensor is faulty; if not, the circuit from the ECM, or ECM itself, is at fault.