Section 8.5 SPN 164/FMI 4

Section 8.5
SPN 164/FMI 4

SPN 164/FMI 4 indicates a Rail Pressure Governor Sensor Circuit Failed Low (short to ground).‪

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Check as follows:‪

  1. Check for multiple codes.
    1. If faults for the Intake Manifold Pressure/Temperature Sensor are active at the same time, repair the circuits between pin 58 or pin 102 of the MCM 120-pin Connector and pin 2 or pin 4 of the Intake Manifold Pressure/Temperature Sensor. Refer to "8.5.1 Verify Repairs" .
    2. If only fault 164/4 is active, go to the next step.
  2. Disconnect the Rail Pressure Governor Sensor.
  3. Disconnect the MCM 120-pin connector.
  4. Measure the resistance of pin 1 of the Rail Pressure Governor Sensor connector and ground.
    1. If resistance is less than 5 Ω, repair short between pin 102 of the 120-pin MCM connector and ground. Refer to "8.5.1 Verify Repairs" .
    2. If resistance is greater than 5 Ω, go to the next step.
  5. Measure the resistance between pin 2 of the Rail Pressure Governor Sensor harness connector and ground.
    1. If resistance is less than 5 Ω, repair the short circuit between pin 2 of the Rail Pressure Governor Sensor harness connector and ground. Refer to "8.5.1 Verify Repairs" .
    2. If resistance is greater than 5 Ω, go to the next step.
  6. Measure the resistance between pin 3 of the Rail Pressure Governor Sensor harness connector and ground.
    1. If resistance is less than 5 Ω, repair the short circuit between pin 3 of the Rail Pressure Governor Sensor harness connector and ground. Refer to "8.5.1 Verify Repairs" .
    2. If resistance is greater than 5 Ω, review steps 4 through 6 . If the results are the same, contact Detroit Diesel Customer Support Center (313-592-5800).

Section 8.5.1
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.
    warning

    ENGINE EXHAUST

    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.


DD15 Fuel System Technician's Guide - DDC-SVC-MAN-0037
Generated on 10-13-2008

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