27.2
SPN 655/FMI 10
27.2 SPN 655/FMI 10
This diagnostic condition is typically a short to ground.
27.2.1
Short to Ground Check
Check as follows:
1. Put the ignition switch in the OFF position.
2. Disconnect the Injector Harness 23–pin connector.
3. Measure the resistance between pin H and ground on the valve cover side of the connector.
[a] If the resistance is less than 5
Ω
, repair the short to ground between Pin H and pin 2
of the injector. Refer to section 27.2.1.1.
[b] If the resistance is greater than 5
Ω
, go to step 4.
4. Measure the resistance between pin Q and ground on the valve cover side of the connector.
[a] If the resistance is less than 5
Ω
, repair the short to ground between pin Q and pin 3
of the injector. Refer to section 27.2.1.1.
[b] If the resistance is greater than 5
Ω
, go to step 5.
5. Disconnect the MCM 120–pin connector.
6. Measure the resistance between pin H and ground on the engine side of the connector.
[a] If the resistance is less than 5
Ω
, repair the short to ground between Pin H and pin 20
of the MCM 120–pin connector. Refer to section 27.2.1.1.
[b] If the resistance is greater than 5
Ω
, go to step 7.
7. Recheck the resistance using steps 3 through 6. When you have just completed the
recheck, go to step 8.
8. Clear the codes. Check for active codes.
[a] If code 655/10 is still active, call the Detroit Diesel Customer Support Center
(313–592–5800) for authorization to replace the MCM.
[b] If there are no active codes, troubleshooting is
fi
nished.
27.2.1.1
Verify Repairs
Verify repairs as follows:
1. Turn the ignition OFF and reconnect all connectors.
2. Turn the ignition ON, and clear codes.
3. Start and run the engine for one minute. Stop the engine.
4. Check for codes
[a] If no codes are present, troubleshooting is complete.
All information subject to change without notice.
27-6
PRELIMINARY 6SE567 0512
Copyright © 2005 DETROIT DIESEL CORPORATION
Summary of Contents for Series 60 DDEC VI
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Page 89: ...4 SPN 84 VEHICLE SPEED SENSOR Section Page 4 1 SPN 84 FMI 3 4 3 4 2 SPN 84 FMI 4 4 4 ...
Page 93: ...5 SPN 86 ADAPTIVE CRUISE CONTROL FAULT Section Page 5 1 SPN 86 FMI 14 5 3 ...
Page 201: ...21 SPN 625 CAN FAULT Section Page 21 1 SPN 625 FMI 2 9 10 13 14 21 3 21 2 SPN 625 FMI 4 21 5 ...