Series 50 – Section 2.14 Turbo Boost Pressure Sensor

Section 2.14
Turbo Boost Pressure Sensor

The Turbo Boost Sensor (TBS) is mounted to the intake manifold with two bolts. A rubber O-ring is used to seal the sensor to the manifold. See Figure "Turbo Boost Pressure Sensor " .‪

1. Intake Manifold‪	6. Air Temperature Sensor‪
2. Intake Manifold Inlet‪	7. Bolt‪
3. Intake Manifold Gasket‪	8. Turbo Boost Sensor Bolt‪
4. Cylinder Head‪	9. Turbo Boost Sensor‪
5. Bolt‪	10. O-ring‪

Figure 1. Turbo Boost Pressure Sensor

This device is a pressure sensor that sends an electrical signal to the ECM. The ECM uses this information to compute the amount of air entering the engine. Fuel supply is regulated by the TBS information to control engine smoke. ‪

Section 2.14.1
Repair or Replacement of Turbo Boost Sensor

The TBS is non-serviceable and must be replaced as an assembly. No adjustment is required.‪

Section 2.14.2
Removal of Turbo Boost Sensor

Remove the TBS as follows: ‪

1. Disengage the locking tang on the TBS connector body. Grasp the terminal body and gently pull it from the sensor.
2. Remove the two bolts that secure the TBS to the intake manifold.

   Note: Be careful not to lose the O-ring.

3. Remove the TBS from the intake manifold.

Section 2.14.3
Installation of Turbo Boost Sensor

Install the TBS as follows: ‪

Note: The TBS is an electronic device. Use care during installation.

1. Apply petroleum jelly to the O-ring to hold it in position.
2. Install O-ring to the TBS.

   NOTICE:
   Do not overtighten the bolts that mount the TBS to the intake manifold. Damage to the TBS may result. Torque the bolts to no more than 2.4-3.0 N·m (21-26 in.·lb).‪

3. Install the TBS to the intake manifold.
4. Install the two bolts that secure the TBS to the intake manifold. Torque to 2.4-3.0 N·m (21-26 in.·lb).
5. Engage the locking tang on the TBS connector body. Grasp the terminal body and gently pull it towards the sensor.
6. Turn the ignition to the "ON" position. Observe or read any diagnostic codes. If any codes other than 25 appears, refer to the DDEC II Troubleshooting Guide , 6SE489, or DDEC III/IV Single ECM Troubleshooting Guide, 6SE497.