Mcm 120–Pin Connector - Detroit Diesel EPA07 Series 60 DDEC VI Troubleshooting Manual

34.1 SPN 174/FMI 3
[b] If the resistance is less than 4k Ω, go to step 7.
7. Turn the ignition ON (key ON, engine OFF).
8. Measure the voltage between pins 1 and 2 of the SFT Sensor harness connector.
[a] If the voltage is between 2.75 and 3.25 volts, refer to section 34.1.1.1.
[b] If the voltage is less than 2.75 volts, go to step 9.
9. Measure the voltage between pin 2 of the SFT Sensor harness connector and ground.
[a] If the voltage is between 2.75 and 3.25 volts, repair the open circuit between
pin 1 of the SFT Sensor harness connector and pin 55 of the 120–pin MCM
connector.See Figure 34-2. Refer to section 34.1.1.1.
[b] If the voltage is less than 2.75 volts, repair the open circuit between pin 2 of the SFT
Sensor harness connector and pin 77 of the 120–pin MCM connector.See Figure
34-2. Refer to section 34.1.1.1.
Figure 34-2 MCM 120–pin Connector
34.1.1.1 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).
34-4
All information subject to change without notice.
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