Series 50G/60G Troubleshooting – Section 5.17 PID 105, FMI 0, Flash Code 44, Intake Manifold Temperature High

Section 5.17
PID 105, FMI 0, Flash Code 44, Intake Manifold Temperature High

The intake manifold temperature is high due to a faulty Air Temperature Sensor.‪

Section 5.17.1
Troubleshooting PID 105, FMI 0, FLASH CODE 44

Troubleshoot as follows:‪

1. Check the Air Temperature Sensor (ATS) to determine if it is faulty using the DDEC Sensor Tester J 37164 (see Figure "DDEC Sensor Tester J 37164" ).
   

   Figure 1. DDEC Sensor Tester J 37164

2. Disconnect the sensor. The ATS is mounted to the bottom of the inlet elbow (see Figure "Location of Air Temperature Sensor" ).
   

   Figure 2. Location of Air Temperature Sensor

3. Disengage locking tang on two-wire connector.
4. Grasp body of the connector and gently pull it from the socket.
5. Use the appropriate wrench on the hex portion of the sensor and unscrew it from inlet elbow.
6. Clip the power leads to the 12 volt power source.
7. Connect the sensor to the tester at the correct connector
8. Plug in a volt OHM meter. The tester will power up the sensor. Check the values to see if the sensor is operating properly.
   1. If the ATS is faulty, refer to "5.17.1.1 Replacing the Air Temperature Sensor" to replace the ATS.
   2. If the ATS is not faulty, go to step .
9. Call Detroit Diesel Technical Service.

Section 5.17.1.1
Replacing the Air Temperature Sensor

The ATS is installed into the air inlet tube. The ATS is non-serviceable, and is replaced as a unit. No adjustment is required. Remove the faulty sensor and replace as follows:‪

NOTICE:
Overtightening will distort and crack the sensor body, resulting in sensor malfunction. Damage may not be evident until sensor removal, when body may break apart.‪

1. If installing a new ATS, there is no need to use sealer as it is applied during manufacturing. When reinstalling a serviceable ATS, apply Loctite pipe sealant with Teflon, PT-7260, or equivalent on all but first two threads.
2. Install ATS into the air inlet tube. Torque to 11-16 N·m (97-142 lb·in.).

   Note: Because of its plastic body, the ATS must be hand started and carefully tightened.

3. Carefully fasten connector onto sensor and engage locking tang.
4. Turn the ignition to the ON position. Check the DDR for any diagnostic code(s).
   1. If the codes are no longer active, refer to "5.17.2 Verification" .
   2. If the codes are still active, call Detroit Diesel Technical Service.

Section 5.17.2
Verification

Verify troubleshooting as follows: ‪

1. Check the DDR to see if PID 105, FMI 0, Flash Code 44 is still active.
   1. If the code is still active, go to step 2.
   2. If the code is not active, troubleshooting is complete.
2. If the code is still active, call Detroit Diesel Technical Service.