Series 60 DDEC VI Troubleshooting – Section 67.3 SPN 704/FMI 5

Section 67.3
SPN 704/FMI 5

This diagnosis is typically an open circuit.‪

Section 67.3.1
Open Circuit Check

Check as follows:‪

1. Perform the Turbo Actuator Hysteresis Test using Artesian software and a turbo interface cable.
   1. If the hysteresis test fails, replace the turbo actuator.
   2. If the hysteresis test result is pass or unable to perform hysteresis test, go to step 2 .
2. Disconnect the turbo actuator connector.
3. Turn the ignition ON (key ON, engine OFF).
4. Measure the voltage between pins 1 and 2 of the turbo actuator connector.
   1. If the voltage is greater than 11.5 volts, go to step 6 .
   2. If the voltage is less than 11.5 volts, go to step 5 .
5. Measure the voltage between pin 1 of the turbo actuator connector and chassis ground.
   1. If the voltage is between 11 and 13 volts, repair the open in the wire between pin 38 of the 120–pin MCM connector and pin 2 of the turbo actuator connector. Refer to "67.1.1.1 Verify Repairs" .
   2. If the voltage is less than 11 volts, repair the open in the wire between pin 93 of the 120–pin MCM connector and pin 1 of the turbo actuator connector. Refer to "67.1.1.1 Verify Repairs" .
6. Turn the ignition OFF.
7. Disconnect the 120–pin MCM connector.
8. Measure the resistance between pin 3 of the turbo actuator connector and pin 35 of the 120–pin MCM connector.
   1. If the resistance is less than 3 Ω, re-verify this procedure. If the results are the same contact the Detroit Diesel Customer Support Center (313–5925800).
   2. If the resistance is greater than 3 Ω, repair the open circuit in the wire between pin 3 of the turbo actuator connector and pin 35 of the MCM 120–pin connector. Refer to "67.1.1.1 Verify Repairs" .

Section 67.3.1.1
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.