MBE 900 DDEC VI Troubleshooting – Section 74.4 SPN 723/FMI 14

Section 74.4
SPN 723/FMI 14

A typical diagnosis is swapped pins.‪

Section 74.4.1
Swapped Pins Check

Check as follows:‪

1. If fault code 723/14 is active, check the engine speed sensor for reversed polarity.
2. Reseat the camshaft and crankshaft sensors.
3. Ensure that the 120-pin connector wires are not crossed. If crossed, repair as necessary. See Figure "Camshaft Position Sensor" . Refer to "74.4.1.1 Verify Repairs" .
   

   Figure 1. Camshaft Position Sensor

Section 74.4.1.1
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.