Series 60 DDEC VI Troubleshooting – Section 82.1 SPN 1072/FMI 4

Section 82.1
SPN 1072/FMI 4

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

Section 82.1.1
Short to Ground Check

Check as follows:‪

1. Disconnect the front injector valve cover harness.
2. Measure resistance between pins 7 and ground on the front injector valve cover harness connector. If you are using J-48671–10 , measure either rear Jake pin and ground.
   1. If the resistance is greater than 15 Ω, repair short to ground between pin 7 of the front injector valve cover harness connector and pin 60 of the 120–pin MCM connector. Refer to "82.1.1.1 Verify Repairs" .
   2. If the resistance is less than 5 Ω, go to step 3 .
3. Remove the upper valve cover.
4. Disconnect the rear Jake Brake harness.
5. Measure resistance between either terminal on the Jake Brake solenoid and ground.
   1. If the resistance is less than 5 ohms, replace the Jake Brake solenoid. Refer to "82.1.1.1 Verify Repairs" .
   2. If the resistance is greater than 5 Ω, repair the short to ground between pins 7 and 8 of the front injector valve cover harness and the Jake Brake solenoid. Refer to "82.1.1.1 Verify Repairs" .

Section 82.1.1.1
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).
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.