Series 60 DDEC VI Troubleshooting – Section 67.2 SPN 704/FMI 4

Section 67.2
SPN 704/FMI 4

This diagnosis is typically a short to ground.‪

Section 67.2.1
Short Circuit Check

Check as follows:‪

1. Disconnect the turbo actuator connector.
2. Disconnect the 120–pin MCM connector.
3. Measure the resistance between pins 1 and 3 of the turbo actuator connector.
   1. If the resistance is less than 5 Ω, repair the short between pins 35 and 93 of the 120–pin MCM connector. Refer to "67.2.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, go to step 4 .
4. Measure the resistance between pins 2 and 3 of the turbo actuator connector.
   1. If the resistance is less than 5 Ω, repair the short between pins 35 and 38 of the 120–pin MCM connector. Refer to "67.2.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, go to step 5 .
5. Measure the resistance between pin 3 of the turbo actuator connector and ground.
   1. If the resistance is less than 5 Ω, repair the short between pin 3 of the turbo actuator connector and ground. Refer to "67.2.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, go to step 6 .
6. Measure the resistance between pin 1 of the turbo actuator connector and ground.
   1. If the resistance is less than 5 Ω, repair the short between pin 1 of the turbo actuator connector and ground. Refer to "67.2.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, refer to "67.2.1.1 Verify Repairs" .

Section 67.2.1.1
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.