MBE 4000 DDEC VI Troubleshooting – Section 117.2 SPN 3563/FMI 3

Section 117.2
SPN 3563/FMI 3

The following procedures will troubleshoot SPN 3563/FMI 3, Intake Manifold Pressure/Temperature Sensor failed high.‪

Section 117.2.1
Sensor Failed High Check

Check as follows:‪

1. Disconnect the Intake Manifold Pressure Temp Sensor.
2. Turn ignition ON.
   

   Figure 1. Intake Manifold Pressure/Temperature Sensor

3. Measure the voltage between pin 1 of the Intake Manifold Pressure Temp Sensor and ground.
   1. If the voltage is greater than 5.5 volts, repair short to power between pin 87 of the MCM 120-pin connector and pin 1 of the Intake Manifold Pressure Temp Sensor.
   2. If the voltage is less than 0.5, go to step 4 .
4. Turn the ignition OFF.
5. Disconnect the MCM 120-pin connector.
6. Measure the resistance between pin 87 of the MCM 120-pin connector and pin 1 of the Intake Manifold Pressure Temp Sensor.
   1. If the resistance is greater than 3 Ω, repair open between pin 87 of the MCM 120-pin connector and pin 1 of the Intake Manifold Pressure Temp Sensor.
   2. If the resistance is less than 3 Ω, replace the Intake Manifold Pressure Temp Sensor.

Section 117.2.1.1
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.