MBE 900 DDEC VI Troubleshooting – Section 113.3 SPN 3510/FMI 4

Section 113.3
SPN 3510/FMI 4

The typical diagnosis for this fault is voltage low.‪

Section 113.3.1
Low Voltage Check

Check as follows:‪

1. Disconnect the Accelerator Pedal (AP) connector.
2. Disconnect the #1 connector of the CPC.
3. Measure the resistance between pin 1 and pin 3 of the AP connector.
   1. If the resistance is less than 5 Ω, repair the short between wires 8 and 4 of the CPC #1 connector. Refer to "113.3.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, go to step 4 .
4. Measure the resistance between pin 2 and 3 of the AP connector.
   1. If the resistance is less than 5 Ω, repair the short between wires 7 and 14 of the CPC #! connector. Refer to "113.3.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, go to step 5 .
5. Measure the resistance between pin 1 of the AP connector and ground.
   1. If the resistance is less than 5 Ω, repair the short circuit between pin 1 of the AP connector and ground. Refer to "113.3.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, go to step 6 .
6. Measure the resistance between pin 2 of the AP connector and ground.
   1. If the resistance is less than 5 Ω, repair the short circuit between pin 2 of the AP connector and ground. Refer to "113.3.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, replace the Accelerator Pedal. Refer to "113.3.1.1 Verify Repairs" .

Section 113.3.1.1
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.