Section 2.39
Barometric Pressure Sensor for the Series 60G Engine With High Pressure Fuel System

The Barometric Pressure Sensor (BARO sensor) is mounted to the sensor bracket at the rear of the cylinder block just above the flywheel housing. The sensor sends an electrical signal to the ECM indicating barometric pressure. It is electrically connected to the ECM through the engine sensor wire harness. A hose is attached to the inlet of the sensor to protect it form dirt and prevent plugging. The ECM uses the data in controlling fuel delivery to the engine. See Figure "Barometric Pressure Sensor for Series 60G Engines" . ‪

Figure 1. Barometric Pressure Sensor for Series 60G Engines

Section 2.39.1
Replacement of the Barometric Pressure Sensor

The barometric pressure sensor is non-serviceable and must be replaced as an assembly.‪

Section 2.39.2
Removal of the Barometric Pressure Sensor

Remove the Barometric Pressure Sensor as follows:‪

1. Disengage the locking tang on the BARO sensor.
2. Disconnect the hose from the inlet of the sensor.
3. Loosen two attaching bolts and remove sensor from bracket.

Section 2.39.3
Installation of the Barometric Pressure Sensor

Install the BARO sensor as follows:‪

1. Install the sensor on the bracket. Torque bolts to 2.7 N·m (24 lb·in.).
2. Connect the inlet hose.
3. Engage it to the sensor wire harness connector.
4. Turn ignition on and, with Diagnostic Data Reader, clear the AFR (air fuel ratio) learn table.
5. Turn ignition to the "ON" position. Observe or read any diagnostic codes. If any codes other than 25 appears, refer to the DDEC II/IV Troubleshooting Guide, 6SE497.