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SUBJECT

DATE

SPN 2630 (MCM)(EPA10) and SPN 2630 (MCM)(GHG14)

April 2015

Additions, Revisions, or Updates
Publication Number / Title

Platform

DDC-SVC-MAN-0084

DD Platform

Section Title

Change

SPN2630 /FMI16 - EPA10

The diagnostic procedure has been updated and
the EPA10 procedure has been added.

SPN2630 /FMI16 - GHG14

All information subject to change without notice.

4 02-15

Copyright © 2015 DETROIT DIESEL CORPORATION

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2 SPN 2630/FMI 16 - EPA10

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SPN 2630/FMI 16 - EPA10

Charge Air Cooler Performance Monitor.
Table 1.
SPN 2630/FMI 16
Description

This code sets when the actual Charge Air Cooler temperature is
higher than the modeled Charge Air Cooler Temperature.

Monitored Parameter

Charge Air Cooler Outlet Temperature Sensor

Typical Enabling Conditions

Engine speed 1200 to1950 rpm, engine torque greater than 1000
N·m (737 lb·ft), intake manifold temperature less than 100°C (212°F).

Monitor Sequence

None

Execution Frequency

Always enabled

Typical Duration

10 seconds

Dash Lamps

MIL, CEL

Engine Reaction

Derate,10%

Verification

Obtain enabling conditions on a chassis dyno or by driving unloaded
vehicle for more than 20 seconds.

Possible causes:
• Low vehicle speed with high engine load
• External CAC restriction (such as a plow, grill winter front or dirt)
• Internal CAC restriction
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.

Check as follows:
1. Is the vehicle equipped with a plow?
a. Yes; Go to step 2.
b. No ; Go to step 3.
2. Remove the plow and road test the vehicle. Does fault code SPN 2630/FMI 16 return?
a. Yes; Go to step 3.
b. No; the fault code is set due to the plow restricting air flow across the Charge Air Cooler. Release the vehicle.
3. Is the vehicle equipped with a winter front?
a. Yes; Go to step 4.
b. No; Go to step 5.
4. Remove the winter front and road test the vehicle. Does fault code SPN 2630/FMI 16 return?
a. Yes; Go to step 5.
b. No; the fault code is caused by the winter front. Refer to 14TS-11 (http://ddcsn-ddc.freightliner.com/cps/rde/xbcr/
ddcsn/14TS11.pdf) for information on winter front usage and effect on vehicle performance. Release the vehicle.
5. Use a flashlight to shine through the radiator and charge air cooler assembly. Can the light from the flashlight be seen
through the other side of the assembly?
a. Yes; Go to step 6.
b. No; clean the charge air cooler assembly as necessary.
6. Remove and inspect the piping to the CAC. Are there signs of fluid intrusion?
a. Yes; diagnose and repair the cause of the fluid intrusion. Refer to OEM literature and flush the CAC. Verify
repair.
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All information subject to change without notice.

Copyright © 2015 DETROIT DIESEL CORPORATION 4 02-15

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b. No; refer to OEM literature and perform the CAC restriction test. Repair as necessary. Verify repair.

All information subject to change without notice.

4 02-15

Copyright © 2015 DETROIT DIESEL CORPORATION

5

3 SPN 2630/FMI 16 - GHG14

3

SPN 2630/FMI 16 - GHG14

Charge Air Cooler Performance Monitor
Table 2.
SPN 2630/FMI 16
Description

This code sets when the actual Charge Air Cooler (CAC)
temperature is higher than the MCM modeled CAC temperature.

Monitored Parameter

Charge Air Cooler Outlet Temperature Sensor

Typical Enabling Conditions

Engine speed 1200 to 1950 rpm, engine torque greater than 1000
N·m (737 lb·ft), intake manifold temperature less than 100°C (212°F).

Monitor Sequence

None

Execution Frequency

Always enabled

Typical Duration

10 seconds

Dash Lamps

MIL

Engine Reaction

None

Verification

Obtain enabling conditions on a chassis dyno or by driving unloaded
vehicle for more than 20 seconds.

Possible causes:
• Low vehicle speed with high engine load
• External CAC restriction (such as a plow, winter front or dirt) Refer to 14TS-11 (http://ddcsn-ddc.freightliner.com/cps/rde/
xbcr/ddcsn/14TS11.pdf) for information on winter front usage and effect on vehicle performance
• Internal CAC restriction
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.

Check as follows:
1. Is the vehicle equipped with a plow?
a. Yes; Go to step 2.
b. No; Go to step 3.
2. Remove the plow and road test the vehicle. Does fault code SPN 2630/FMI 16 return?
a. Yes; Go to step 3.
b. No; the fault code is set due to the plow restricting air flow across the Charge Air Cooler. Go to step 7.
3. Is the vehicle equipped with a winter front?
a. Yes; Go to step 4.
b. No; Go to step 5.
4. Remove the winter front and road test the vehicle. Does fault code SPN 2630/FMI 16 return?
a. Yes; Go to step 5.
b. No; Go to step 7.
5. Use a flashlight to shine through the radiator and charge air cooler assembly. Can the light from the flashlight be seen
through the other side of the assembly?
a. Yes; Go to step 6.
b. No; clean the charge air cooler assembly as necessary.
6. Remove and inspect the piping to the CAC. Are there signs of fluid intrusion?
a. Yes; diagnose and repair the cause of the fluid intrusion. Refer to OEM literature and flush the CAC. Verify
repair.
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All information subject to change without notice.

Copyright © 2015 DETROIT DIESEL CORPORATION 4 02-15

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b. No; refer to OEM literature and perform the CAC restriction test. Repair as necessary. Verify repair.
7. Check the MCM software level. Is the MCM software level 4.1.0.47 with fuel map ZGS 003 or higher?
a. Yes; release the vehicle.
b. No; update the MCM software level using the latest server information. The new software has an improved fan
operation strategy. Release the vehicle.

All information subject to change without notice.

4 02-15

Copyright © 2015 DETROIT DIESEL CORPORATION

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