MBE 900 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/Temp Sensor short to power.‪

Section 117.2.1
Short to Power Check

Check as follows:‪

1. Check for multiple codes.
   1. If fault code 3563/3 and 1636/3 are present, repair open circuit between pin 102 of the 120-pin MCM connector and pin 4 of the Intake Manifold Pressure/Temp Sensor. See Figure "Intake Manifold Pressure/Temp Sensor" . Refer to "117.2.1.1 Verify Repairs" .
   2. If only fault code 3563/3 is present, go to step 2 .
2. Disconnect the Intake Manifold Pressure/Temp Sensor.
3. Disconnect the 120-pin MCM connector.
4. Measure the resistance between pins 1 and 4 of the Intake Manifold Pressure/Temp Sensor harness connector. See Figure "Intake Manifold Pressure/Temp Sensor" .
   

   Figure 1. Intake Manifold Pressure/Temp Sensor

   1. If the resistance is greater than 5 Ω, repair short to power in the circuit between pin 87 of the 120-pin MCM connector and pin 1 of the Intake Manifold Pressure/Temp Sensor. See Figure "Intake Manifold Pressure/Temp Sensor" . Refer to "117.2.1.1 Verify Repairs" .
   2. If the resistance is less than 5 Ω, repair the short between wire 58 and 87 of the 120-pin MCM connector. See Figure "Intake Manifold Pressure/Temp Sensor" . Refer to "117.2.1.1 Verify Repairs" .

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.