DD15 SPN 2630/FMI 4 Troubleshooting

SPN 2630/FMI 4

This diagnostic condition is typically intake air temperature circuit failed low.‪

Repair the short to ground between pin 2 of the Intake Air Temperature Sensor harness connector and pin 119 of the MCM 120–pin connector. Refer to “95.2.1 Verify Repairs” .‪

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.

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