DD15 Troubleshooting – Section 31.6 SPN 164/FMI 5

Section 31.6
SPN 164/FMI 5

The fault condition is typically Rail Pressure Sensor circuit open or a stuck in range sensor.‪

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Check as follows:‪

  1. Check for multiple codes
    1. If additional fault codes are present with 615/14, service the additional fault codes first.
    2. If only 615/14 is present go to the next step.
  2. Turn the ignition OFF.
  3. Disconnect the Rail Pressure Sensor.
  4. Turn the ignition ON (key ON, engine OFF).
  5. Check for 5 volt supply at pin 3 of the Rail Pressure Sensor.
    1. If voltage is correct, replace the Rail Pressure Sensor. Refer to "31.6.1 Verify Repairs" .
    2. If no voltage was found, repair the circuit between pin 3 of the Rail Pressure Sensor and pin 58 of the MCM 120 MCM connector. Refer to "31.6.1 Verify Repairs" .

Section 31.6.1
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.


    To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

  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.

EPA07 DD15 Troubleshooting Guide - DDC-SVC-MAN-0029
Generated on 10-13-2008

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