Series 60 DDEC VI Troubleshooting – Section 82.2 SPN 1072/FMI 5

Section 82.2
SPN 1072/FMI 5

This fault code indicates that the Jake Brake Stage 1 circuit failed open.‪

Section 82.2.1
Open Circuit Check

Check as follows:‪

1. Check for multiple codes.
   1. If SPN 647/5, SPN 1071/5 and SPN 1072/5 are active repair the open in between pin 91 of the 120–pin MCM connector and the rear Jake Brake and fan control solenoids. Refer to "82.2.1.1 Verify Repairs" .
   2. If only SPN 1072/5 is active, go to step 2 .
2. Disconnect the front injector valve cover harness.
3. Measure the resistance between pin 7 and 8 on the front injector valve cover harness connector. If you are using J-48671–10 , measure across the rear Jake pins.
   1. If the resistance is less than 15 Ω, repair the open between pin 7 of the front injector valve cover harness connector and pin 66 of the 120–pin MCM connector.
   2. If the resistance is greater than 15 Ω, go to step 4 .
4. Remove the valve cover.
5. Measure the resistance across the Jake Brake solenoid.
   1. If the resistance is greater than 15 Ω, replace the Jake Brake solenoid. Refer to "82.2.1.1 Verify Repairs" .
   2. If the resistance is less than 15 Ω, repair the open between pins 7 and 8 of the front injector valve cover harness connector and the Jake Brake solenoid. Refer to "82.2.1.1 Verify Repairs" .

Section 82.2.1.1
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.