MBE 900 DDEC VI Troubleshooting – Section 117.1 SPN 3563/FMI 0/1/2

Section 117.1
SPN 3563/FMI 0/1/2

The following procedures will troubleshoot SPN 3563/FMI 0/1/2, intake manifold pressure high or low or erratic data.‪

Section 117.1.1
Low (Boost) Pressure Check

Check as follows:‪

1. Turn the ignition ON (key ON, engine OFF).
2. Check for historic fault codes in addition to 3563/0/1/2.
   1. If other historic fault codes are present, troubleshoot other fault codes first.
   2. If only fault code 3563/0 or 3563/1 or 3563/2 is present, go to step 3 .
3. Check for a restricted air filter or air intake system.
   1. If the air filter or air intake system is restricted, replace the air filter and/or eliminate the restriction in the air intake system. Refer to "117.1.2.1 Verify Repairs" .
   2. If the air filter or air intake system is not restricted, go to step 4 .
4. Check the condition of the Intake Manifold Pressure/Temp Sensor. See Figure "Intake Manifold Pressure/Temp Sensor" .
   

   Figure 1. Intake Manifold Pressure/Temp Sensor

   1. If sensor is not in good condition, replace sensor. Refer to "117.1.2.1 Verify Repairs" .
   2. If sensor is in good condition, go to step 5 .
5. Visually inspect the CAC (charge air cooler) and the CAC hoses for leaks.
   1. If leaks are found, repair or replace the CAC and/or CAC hoses. Refer to "117.1.2.1 Verify Repairs" .
   2. If no leaks are found, go to step 6 .
6. Check for a faulty turbocharger (compressor wheel does not spin freely or is rubbing on side walls).
   1. If the turbocharger is faulty, replace it. Refer to "117.1.2.1 Verify Repairs" .
   2. If the turbocharger is not faulty, go to step 7 .
7. Verify that fuel delivery is within specifications (no restrictions to fuel flow).
   1. If fuel delivery is not within specifications, eliminate restrictions in fuel delivery system. Refer to "117.1.2.1 Verify Repairs" .
   2. If fuel delivery is within specifications, check for erratic data. Refer to "117.1.2 Erratic Data Check" .

Section 117.1.2
Erratic Data Check

Check for erratic data:‪

1. Turn the ignition ON (key ON, engine OFF).
2. Find the altitude for your local area and use Table 1 to determine the kPa value for the local altitude.
3. Open DDDL and change the units to metric. (Tool menu > Options > Metric).
4. Using DDDL, read the value of the Barometric Pressure Sensor. The value should be within X kPa of the value in Table 1.
   1. If the value is greater than X kPa, replace the Intake Manifold Pressure/Temp Sensor. Refer to "117.1.2.1 Verify Repairs" .
   2. If the value is less than X kPa,, go to step 5 .
5. Using DDDL, read the value of the Barometric Pressure Sensor. The value should be within X kPa of the value in Table 1.
   1. If the value is greater than X kPa, replace the Barometric Pressure Sensor. Due to its location in the MCM, replacing the Barometric Pressure Sensor means replacing the MCM.Refer to "117.1.2.1 Verify Repairs" .
   2. If the value is less than X kPa,, go to step 6 .
6. Start the engine and run at idle.
7. Using DDDL, read the value of the Intake Manifold Pressure/Temp Sensor (boost pressure). The value should be within X kPa of 0.00.
   1. If the value is not within X kPa, replace the Intake Manifold Pressure/Temp Sensor. Refer to "117.1.2.1 Verify Repairs" .
   2. If the value is within X kPa, go to step 8 .
8. Using DDDL, read the value of the Barometric Pressure Sensor.
   1. If the value is not within X kPa, replace the Barometric Pressure Sensor. Due to its location in the MCM, replacing the Barometric Pressure Sensor means replacing the MCM.Refer to "117.1.2.1 Verify Repairs" .
   2. If the value is within X kPa,, go to step 9 .
9. Run the engine to 1500 rpm.
10. Using DDDL, read the value of the Intake Manifold Pressure/Temp Sensor (boost pressure). The value should be X kPa at 1500 rpm.
    1. If the value is not within 2 kPa, replace the sensor.
    2. If the value is within 2 kPa, go to step 11 .
11. Using DDDL, read the value of the Barometric Pressure Sensor.
    1. If the value is not within X kPa, replace the Barometric Pressure Sensor. Due to its location in the MCM, replacing the Barometric Pressure Sensor means replacing the MCM.Refer to "117.1.2.1 Verify Repairs" .
    2. If the value is within X kPa, contact Detroit Diesel Customer Support Center (313–592–5800).

Section 117.1.2.1
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.