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12 02-13
SUBJECT
DATE
SPN 5488/FMI 5 – GHG14 (ACM2.1)
December 2013
Additions, Revisions, or Updates
Publication Number / Title
DDC-SVC-MAN-0084
Platform
Section Title
Change
GHG14 DD
Platform
SPN 5488/FMI 5 –
GHG14
This is a new diagnostic for SCR line heater 5.
All information subject to change without notice.
12 02-13 Copyright © 2014 DETROIT DIESEL CORPORATION
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2 SPN 5488/FMI 5 – GHG14
2
SPN 5488/FMI 5 – GHG14
This diagnostic is typically Selective Catalyst Reduction (SCR) Line Heater 5 Circuit Failed Open.
Table 1.
SPN 5488/FMI 5
Description
SCR Line Heater 5 Circuit Failed Open
Monitored Parameter
SCR Line Heater 5 Circuit
Typical Enabling Conditions
Always on
Monitor Sequence
None
Execution Frequency
Continuous when enabling conditions met
Typical Duration
2 Seconds
Dash Lamps
MIL, CEL
Engine Reaction
None
Verification
Output Component Test
NOTE: Diesel Exhaust Fluid (DEF) line heaters are internal of the DEF lines. The heater electrical connectors are
located near the DEF line couplings.
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All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 12 02-13
12 02-13
Table 2.
Line Heater 1
Doser To Tank DEF Line (Long-Line Extension Only)
Line Heater 2
Tank To Pump DEF Line
Line Heater 3
Pump To Doser DEF Line (Long-Line Extension Only)
Line Heater 4
Pump To Doser DEF Line
Line Heater 5
Doser To Tank DEF Line
Check as follows:
1. Disconnect line heater 5 harness connector. Refer to Original Equipment Manufacturer (OEM) literature for schematic
information.
2. Inspect the harness connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of
moisture in the connector or wire damage near the connector.
a. If signs of damage are present, repair as necessary. Using DDDL/DDRS 7.10 or higher, perform Output
Component Test to verify repairs.
b. If no signs of damage are present, Go to step 3.
3. Turn the ignition ON (key ON, engine OFF).
4. Measure the voltage between pin 2 on the line heater 5 harness side connector and battery ground.
a. If the voltage is greater than 11.5V, Go to step 5.
b. If the voltage is less than 11.5V, repair the wire between pin 2 on the harness side of the DEF line heater
connector and pin 39 of the ACM2.1 120-pin connector. Using DDDL/DDRS 7.10 or higher, perform Output
Component Test to verify repairs.
5. Turn the ignition OFF.
6. Disconnect the ACM2.1 120-pin connector.
7. Inspect the harness connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of
moisture in the connector or wire damage near the connector.
a. If signs of damage are present, repair as necessary. Using DDDL/DDRS 7.10 or higher, perform Output
Component Test to verify repairs.
b. If no signs of damage are present, Go to step 8.
8. Measure the resistance between pin 1 on the line heater 5 harness side connector and pin 16 of the ACM2.1 120-pin
harness side connector.
a. If the resistance is greater than 5 ohms, repair the open wire between pin 1 on the line heater 5 harness side
connector and pin 16 of the ACM2.1 120-pin harness side connector. Refer to Original Equipment Manufacturer
(OEM) literature for schematic information.
b. If the resistance is less than 5 ohms, replace line heater 5. Refer to section "Removal of the GHG14 Diesel
Exhaust Fluid Lines".
All information subject to change without notice.
12 02-13 Copyright © 2014 DETROIT DIESEL CORPORATION
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