DD15 Troubleshooting

Section 81.1 SPN 1077/FMI 5

Section 81.1
SPN 1077/FMI 5

SPN 1077/FMI 5 indicates a quantity control valve current too low.‪

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Check as follows:‪

  1. Disconnect the quantity control valve.
  2. Measure the resistance across pins 1 and 2 of the quantity control valve.
    1. If the resistance is greater than 2 Ω, replace quantity control valve. Refer to "81.1.1 Verify Repairs" .
    2. If the resistance is less than 2 Ω, go to the next step.
  3. Disconnect the MCM 120-pin connector.
  4. Measure the resistance between pin 1 of the MCM 120-pin connector and pin 1 of the quantity control valve.
    1. If the resistance is less than 5 Ω, go to next step.
    2. If the resistance is greater than 5 Ω, repair the open circuit between pin 1 of the 120 MCM connector and pin 1 of the quantity control valve. Refer to "81.1.1 Verify Repairs" .
  5. Measure the resistance between pin 2 of the MCM 120-pin connector and pin 2 of the quantity control valve.
    1. If the resistance is less than 5 Ω, call the Detroit Diesel Customer Support Center at 313–592–5800 for authorization to replace the MCM.
    2. If the resistance is greater than 5 Ω, repair the open circuit between pin 2 of the MCM 120-pin connector and pin 2 of the quantity control valve. Refer to "81.1.1 Verify Repairs" .

Section 81.1.1
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.
    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.


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

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