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7 01-14
SUBJECT
DATE
SPN 168/FMI 0 and 1 (IPPC)(GHG14)
July 2014
Additions, Revisions, or Updates
Publication Number / Title
Platform
DDC-SVC-MAN-0084
DD Platform
Section Title
SPN 168/FMI 0 - GHG14
SPN 168/FMI 1 - GHG14
All information subject to change without notice.
7 01-14
Copyright © 2014 DETROIT DIESEL CORPORATION
Change
These are new diagnostics for a new section.
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2 SPN 168/FMI 0 - GHG14
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SPN 168/FMI 0 - GHG14
Battery Plus Terminal 30 Voltage too high
Table 1.
SPN 168/FMI 0
Description
This fault code sets when the Integrated Predictive Powertrain
Control (IPPC) module detects that the voltage on pin 1 is too high.
Monitored Parameter
Battery voltage
Typical Enabling Conditions
Ignition on
Monitor Sequence
Always
Execution Frequency
Always
Typical Duration
2 seconds
Dash Lamps
None
Engine Reaction
None
Verification
Start and idle the engine
Table 2.
Front Looking into the Pins on the
Harness
4
All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 7 01-14
7 01-14
Check as follows:
1. Connect DiagnosticLink ®.
2. Turn the ignition ON (key ON, engine OFF).
3. Check for the high voltage code in other modules. Is code SPN 168/FMI 0 present in the other modules?
a. Yes; refer to OEM literature and diagnose the high battery voltage concern.
b. No; refer to OEM literature and replace the IPPC module. Verify repair.
All information subject to change without notice.
7 01-14
Copyright © 2014 DETROIT DIESEL CORPORATION
5
3 SPN 168/FMI 1 - GHG14
3
SPN 168/FMI 1 - GHG14
Battery Plus terminal 30 Voltage too low
Table 3.
SPN 168/FMI 1
Description
This fault code sets when the Integrated Predictive Powertrain
Control (IPPC) module detects that the battery voltage is too low.
Monitored Parameter
Battery voltage
Typical Enabling Conditions
Ignition on
Monitor Sequence
Always
Execution Frequency
Always
Typical Duration
2 seconds
Dash Lamps
None
Engine Reaction
None
Verification
Start and idle the engine
Table 4.
Front Looking into the Pins on the
Harness
6
All information subject to change without notice.
Copyright © 2014 DETROIT DIESEL CORPORATION 7 01-14
7 01-14
Check as follows:
1. Check for code SPN 168/FMI 1 in other modules. Is code SPN 168/FMI 1 also set in any other modules?
a. Yes; refer to OEM literature and diagnose the low battery voltage concern.
b. No; Go to step 2.
2. Turn the ignition OFF.
3. With the ignition off, disconnect the IPPC electrical connector.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level
surface, parking brake is set, and the wheels are blocked.
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area.
Engine exhaust is toxic.
4. Start the engine.
5. Measure the voltage between pin 1 and pin 3 of the IPPC electrical connector. Is the voltage lower than 10.5 volts?
a. Yes; Go to step 6.
b. No; replace the IPPC module. Verify repair.
6. Measure the voltage between pin 1 of the IPPC electrical connector harness side and ground. Is the voltage greater than
10.5 volts?
a. Yes; refer to OEM literature and repair the IPPC ground circuit to Pin 3 of the IPPC electrical connector.
b. No; refer to OEM literature and repair the IPPC battery power circuit to pin 1 of the IPPC electrical connector.
All information subject to change without notice.
7 01-14
Copyright © 2014 DETROIT DIESEL CORPORATION
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