MBE 4000 DDEC VI Troubleshooting – Section 117.3 SPN 3563/FMI 4

Section 117.3
SPN 3563/FMI 4

The following procedures will troubleshoot SPN 3563/FMI 4, Intake Manifold Pressure/Temperature Sensor Circuit Failed Low.‪

Section 117.3.1
Circuit Failed Low Check

Check as follows:‪

1. Disconnect the Intake Manifold Pressure/Temperature Sensor.
2. Disconnect the MCM 120-pin connector.
   

   Figure 1. Intake Manifold Pressure/Temperature Sensor

3. Measure the resistance between pin 1 of the Intake Manifold Pressure/Temperature Sensor and ground.
   1. If the resistance is less than 3Ω, repair short to ground between pin 87 of the MCM 120-pin connector and pin 1 of the Intake Manifold Pressure/Temperature Sensor.
   2. If the resistance is greater than 3Ω, replace the Intake Manifold Pressure/Temperature Sensor.

Section 117.3.1.1
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.