Spn 641/Fmi 9 - Detroit Diesel EPA07 Series 60 DDEC VI Troubleshooting Manual

57.3

SPN 641/FMI 9

57.3 SPN 641/FMI 9
This code typically means the Smart Remote Actuator 5 is in Failsafe Mode, Motor Off.
57.3.1 Actuator Check
Check as follows:
1. Disconnect the turbo actuator.
2. Inspect the turbo actuator connector and harness for damaged, bent or spread pins.
[a] If damage is found, repair as necessary. Refer to section 57.3.1.1.
[b] If no damage is found, go to the next step.
3. Disconnect the MCM 120–pin connector.
4. Measure the resistance between pin 3 of the turbo actuator harness connector and pin 74
of the MCM 120–pin connector.
[a] If the resistance is greater than 3 Ω, repair the open circuit between pin 3 of the
turbo actuator harness connector and pin 74 of the MCM 120–pin connector.
Refer to section 57.3.1.1.
[b] If the resistance is less than 3 Ω, go to the next step.
5. Measure the resistance between pin 4 of the turbo actuator harness connector and pin 75
of the MCM 120–pin connector.
[a] If the resistance is greater than 3 Ω, repair the open circuit between pin 4 of the
turbo actuator harness connector and pin 75 of the MCM 120–pin connector.
Refer to section 57.3.1.1.
[b] If the resistance is less than 3 Ω, replace the turbo actuator. Refer to section 57.3.1.1.
57.3.1.1 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.
57-6
All information subject to change without notice.
Copyright © 2007 DETROIT DIESEL CORPORATION