MBE 900 DDEC VI Troubleshooting – Section 82.1 SPN 1172/FMI 3

Section 82.1
SPN 1172/FMI 3

This code is typically a coolant temperature/compressor inlet temperature plausibility error.‪

Section 82.1.1
Turbo Compressor Inlet Temperature Sensor Check

Check as follows:‪

1. Disconnect the Turbo Compressor Inlet Temperature Sensor. See Figure "Turbo Compressor In Temperature Sensor" .
2. Inspect the Turbo Compressor Inlet Temperature Sensor connectors for bent, damaged or corroded pins.
   1. If damaged pins are found, repair as necessary. Refer to "82.1.1.1 Verify Repairs" .
   2. If no damage is found, replace the Turbo Compressor Inlet Temperature Sensor. Refer to "82.1.1.1 Verify Repairs" .
   

   Figure 1. Turbo Compressor In Temperature Sensor

Section 82.1.1.1
Verify Repairs

Verify repairs as follows:‪

1. Turn ignition OFF.
2. Reconnect any electrical connections that were disconnected to perform the diagnosis.
3. Clear codes with DDDL 7.0 or latest version.
4. Start and bring engine up to operating temperature (over 140°F/60°C).
5. Verify operation is satisfactory and no warning lamps illuminate. If warning lamps illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel Customer Support Center at 313–592–5800.