Harley Davidson Sportster Models 2009. Service Repair Manual — page 50
4.19
DTC P0131, P0132, P0134, P0151, P0152, P0154
GENERAL
Oxygen Sensor
. The Oxygen (O2) sensor provides a signal
to the ECM which indicates whether the engine is running rich
or lean.
•
A DTC P0131 (front) or P0151 (rear) is set when the ECM
detects an excessively lean condition for a specified length
of time. DTCs may also set if O2 sensor fails.
•
A DTC P0132 (front) or P0152 (rear) is set when the ECM
detects an excessively rich condition for a specified length
of time. DTCs may also set if O2 sensor fails.
•
A DTC P0134 is set when the front O2 sensor circuit is
open or sensor is too cold to respond. A DTC P0154 is
set when the rear O2 sensor circuit is open or sensor is
too cold to respond.
When the air/fuel mixture is ideal, approximately 14.6 parts air
to 1 part fuel, the voltage will be approximately 0.45V.
Table 4-28. Code Description
DESCRIPTION
DTC
Front O2 sensor low or engine running lean
P0131
Engine running rich
P0132
Front O2 sensor open/not responding/high
P0134
Rear O2 sensor low or engine running lean
P0151
Engine running rich
P0152
Rear O2 sensor open/not responding/high
P0154
ed02856
Figure 4-39. Oxygen Sensor
DIAGNOSTICS
TOOL NAME
PART NUMBER
BREAKOUT BOX
HD-43876
DIGITAL TECHNICIAN II
HD-48650
Diagnostic Tips
Diagnostic codes for the O2 sensor may be seen during the
vehicle break-in period. The O2 sensor diagnostic codes will
not illuminate the check engine lamp for current or historic
codes and will only be indicated by DIGITAL TECHNICIAN
II (Part No. HD-48650) or odometer self-diagnostics. If the
diagnostic codes are reported during the break-in period, clear
or ignore the codes until the break-in period is completed. All
historic O2 sensor diagnostic codes are to be ignored and
cleared.
The DVOM displays the signal from the O2 sensor in volts.
This voltage will have an average value tending towards lean,
rich or ideal value depending on operating temperature of the
engine, engine speed and throttle position. An open/short to
voltage or short to ground in the (PK/O) wire (front) and
(PK/GN) wire (rear) will cause the engine to run rich (short to
ground) or lean (short to voltage) until fault is detected. Once
fault is detected, vehicle will run in open loop.
Check for the following conditions:
•
Poor connection. Inspect the ECM harness connector
[78], fuel injector connectors [84, 85] and O2 sensor con-
nector wiring for backed out terminals, improper mating,
inoperative locks, improperly formed or damaged ter-
minals, poor terminal-to-wire connection and damaged
harness.
•
Dirty/stuck open injectors. The motorcycle may run lean
(dirty/clogged injectors) or rich (stuck open injectors) if
there is an injector problem. This could also cause poor
fuel economy and performance.
•
Loose oxygen sensor. If the O2 sensor is loose, engine
performance may be affected. This could also show up
as a slow changing O2 sensor voltage.
•
Loose/leaking exhaust. This can cause a poor ground
connection for sensor or allow fresh air into the exhaust
system. If fresh air enters exhaust system, the O2 sensor
will read a lean condition, causing the system to go rich.
•
Engine misfire. See
.
Diagnostic Notes
Each reference number below correlates to a circled number
on the flowchart(s).
1.
Connect a BREAKOUT BOX (Part No. HD-43876) between
EFI wire harness and ECM before measuring voltage. See
.
2.
5 volts is typical for a cold engine. Once the O2 sensors
are up to operating temperature, typical voltage is 0.45
volt.
3.
See Intake Leak Test in the service manual.
4-82 2009 Sportster Diagnostics: Engine Management
BE
GY/BK
BE
GY/BK
PK/GN
PK/O
BK/W
BK/W
BK/W
BK/W
BK/W
8
F
ront
o
xygen
sensor
input
5V
sensor
g
round
Rear
o
xygen
sensor
input
26
8
26
23
23
ECM
[78A]
[78B]
[138A]
[138B]
[137A]
To ET sensor
[137B]
Front Oxygen
Sensor
Rear Oxygen
Sensor
1
2
1
2
1
2
1
2
em01209
Figure 4-40. Oxygen Sensor
Table 4-29. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Under seat
36-place Packard
ECM
[78]
H-bracket
2-place Amp
Rear O2 sensor
[137]
Voltage regulator electrical caddy
2-place Amp
Front O2 sensor
[138]
2009 Sportster Diagnostics: Engine Management 4-83
DTCs P0131, P0132, P0134, P0151, P0152, and P0154 (Part 1 of 3)
Disconnect O2 sensor from harness. Connect DVOM to terminal 8 (front, +)
and terminal 26 (-), 23 (rear, +) and terminal 26 (-) of connector [78] (gray).
Turn ignition ON. Observe O2 voltage.
Is voltage approximately 5.0 volts?
YES
NO.
0 volts.
NO.
Voltage is greater
than 5 volts.
Install Breakout Box (HD-43876)
leaving ECM [78] disconnected
from the Breakout Box. Check for
continuity to ground on terminal 8
(front) or terminal 23 (rear). Is
continuity present?
Install Breakout Box (HD-43876)
leaving ECM [78] disconnected
from the Breakout Box.
Is voltage present?
YES
NO
YES
NO
Locate and repair
short to ground on
(PK/O) (front) and/or
(PK/GN) (rear) wire.
Replace ECM.
See service manual.
Inspect (PK/O) (front)
and/or (PK/GN) (rear)
wire for shorts to
voltage and repair.
Replace ECM.
See service manual.
1
1
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS Confirm proper
operation with no check engine lamp
1
2
fc01982_en
Go to DTCs P0131, P0132,
P0134, P0151, P0152, and
P0154 (Part 2 of 3).
4-84 2009 Sportster Diagnostics: Engine Management
DTCs P0131, P0132, P0134, P0151, P0152, and P0154 (Part 2 of 3)
Continued from DTCs P0131, P0132, P0134, P0151,
P0152, and P0154 (Part 1 of 3).
Turn ignition OFF and reconnect O2 sensor. Turn
ignition ON and start engine. Allow engine to reach
operating temperature.
With engine idling, does voltage at terminal 8 (+) and
terminal 26 (-) (front) and terminal 23 (+) and terminal
26 (-) (rear) quickly fluctuate between 0 and 1.0
volts?
NO.
0.0-0.4 volts.
NO.
0.6-1.0 volts.
NO.
Slow or no change.
YES
Perform an FUEL
PRESSURE TEST. See
service manual.
Is pressure too low?
Perform an FUEL
PRESSURE TEST. See
service manual.
Is pressure too high?
Check for continuity
between terminal 8 [78]
(front) and terminal 1
[138] (front) or terminal
23 [78] (rear) and
terminal 1 [137] (rear).
Is continuity present?
YES
NO
Repair low
pressure problem.
See service
manual.
Check for restricted fuel
filter or fuel line.
Is there a restriction
present?
YES
NO
Replace fuel
pressure regulator.
See service
manual.
Check for
injectors stuck
open. See 4.20
DTC P0261, P0262,
P0263,
P0264. Retest.
YES
NO
Replace O2
sensor.
See service
manual.
Repair open
on (PK/O) (front)
and/or (PK/GN)
(rear) wire.
YES
NO
Replace fuel line
or filter.
Check for air leaks
at induction
module.
Is an air leak
present?
YES
Repair air
leaks.
NO
Fuel injectors may be
dirty.
See service manual.
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
fc01983_en
3
Go to DTCs P0131,
P0132, P0134,
P0151, P0152, and
P0154 (Part 3 of 3).
2009 Sportster Diagnostics: Engine Management 4-85
DTCs P0131, P0132, P0134, P0151, P0152, and P0154 (Part 3 of 3)
Continued from DTCs P0131, P0132, P0134, P0151, P0152, and P0154 (Part 2 of 3).
Check for intermittents by performing 4.8 WIGGLE TEST starting from beginning of chart.
Are there intermittents present?
YES
NO
Repair
as necessary.
Replace O2 sensor. See service manual. Clear codes
and road test. Check for DTCs. Did O2 sensor set
a P0131, P0132, P0134, P0151, P0152 or P0154?
YES
NO
Install original O2 sensor and replace ECM.
See service manual.
Road test again to verify.
System
now OK.
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
fc01984_en
4-86 2009 Sportster Diagnostics: Engine Management
4.20
DTC P0261, P0262, P0263, P0264
GENERAL
Fuel Injectors
The fuel injectors are solenoids that allow pressurized fuel into
the intake tract. The injectors are timed to the engine cycle and
triggered sequentially. The power for the injectors comes from
the system relay. The system relay also provides power for
the fuel pump and the ignition coil. The ECM provides the path
to ground to trigger the injectors.
NOTE
ECM fuse and system relay failures or wiring harness problems
will cause 12 volt power to be lost to both injectors, ignition
coils and fuel pump.
Table 4-30. Code Description
DESCRIPTION
DTC
Front injector open/low
P0261
Front injector high
P0262
Rear injector open/low
P0263
Rear injector high
P0264
DIAGNOSTICS
TOOL NAME
PART NUMBER
HARNESS CONNECTOR TEST KIT
HD-41404-B
BREAKOUT BOX
HD-43876
Diagnostic Notes
Each reference number below correlates to a circled number
on the flowchart(s).
1.
See the service manual for all service information.
2.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), purple pin probe and patch cord.
3.
Connect a BREAKOUT BOX (Part No. HD-43876) between
EFI wire harness and ECM. See
ed02060
Figure 4-41. Fuel Injector Test Lamp (Part No. HD-34730-2C)
2009 Sportster Diagnostics: Engine Management 4-87
System
Relay
Front Injector
Rear Injector
15 Amp
ECM Fuse
15 Amp
Fuel Pump
Fuse
30 Amp
MAXIFUSE
15 Amp
IGN Fuse
Ignition
TSM/HFSM
Fuel
Pump
Ignition
Coil
Battery
System Relay
Front Injector
Rear Injector
Rear Coil
Front Coil
Battery
Switch Power
Ground
Ground
BK
BK
GY
BK
GY
BK
BK
GY
GY
W/Y
W/Y
W/Y
R
R
R
R
R
GN/GY
GN/GY
GN/GY
BE/GY
BE/GY
BE/GY
GN/O
Y/GN
Y/BE
BE/O
Y/BE
BE/O
R/BK
R/BK
W/BK
GN/O
Y/GN
O/GY
O/GY
Y/GN
Y/GN
Y/GN
W/BK
W/BK
Y/GN
Y/GN
Y/GN
W/BK
10
19
21
2
31
13
28
A
B
A
B
A
B
A
B
1
4
1
4
13
7
8
13
7
8
[145A] [145B]
2
2
11
29
10
19
21
2
31
13
28
11
29
A
B
C
D
ECM
A
B
C
D
4
3
4
3
Fuse Block
GND 1
GND 1
Engine Case
Ground Point
[22B]
[22A]
[30B]
[30A]
[83A]
[83B]
[119A]
[119B]
[85A]
[85B]
[84A]
[84B]
[141B]
[141A]
[78B]
[78A]
86
85
30
87A
87
1
2
3
4
5
U
S
E
T
K
Engine Stop
Switch
em00265
Ignition
Switch
B
A
I
Figure 4-42. Fuel Injector Circuit
Table 4-31. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Under fuel tank
6-place Molex, black
Right hand controls
[22]
Under battery
12-place Deutsch, gray
TSM/TSSM/HFSM
[30]
Under seat
36-place Packard
ECM
[78]
Back of coil, under fuel tank
4-place Delphi, black
Ignition coil
[83]
Beneath fuel tank
2-place Delphi
Front injector
[84]
Beneath fuel tank
2-place Delphi
Rear injector
[85]
4-88 2009 Sportster Diagnostics: Engine Management
Table 4-31. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Fuse/relay block, behind left side cover
5-place Amp, spade ter-
minals
Relay/fuse block
[119]
Forward of relay/fuse blocks
4-place Molex, black
Fuel pump and low fuel switch
[141]
Under seat
16-place Molex
Engine harness
[145]
2009 Sportster Diagnostics: Engine Management 4-89
DTCs P0261, P0262, P0263, and P0264 (Part 1 of 3)
Is wire bail on connector securely
attached to the fuel injector?
1
YES
NO
Reconnect.
Using Fuel Injector Test
Lamp, crank engine.
Does lamp flash?
YES
Recheck connections.
Perform 4.8 WIGGLE TEST
to check for intermittents.
Are intermittents present?
NO
Check terminal A (Y/GN) wire on injector
connector to ground.
Is battery voltage on 2 seconds after key
ON?
YES
Repair
intermittent.
NO
Measure resistance of suspect
injector across injector terminals.
Is resistance 10.0-25.0 ohms?
YES
Check for loose
or corroded terminals
in harness.
NO
Replace
injector.
2
1
NO
Check for battery voltage at
terminal 87 of system
relay during first 2 seconds after
key ON.
Is battery voltage present?
YES
NO
YES
System relay OK. Measure
resistance between terminal
87 of system relay and
terminal A (Y/GN) wire at
injector connector.
Is resistance less than 0.5
ohm?
YES
NO
Perform 4.8 WIGGLE
TEST to check for
intermittents. Repair
as necessary.
Find and repair
bad connection
or open wire.
2
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
fc01985_en
Go to DTCs P0261,
P0262, P0263 and
P0264
(Part 2 of 3).
Go to DTCs P0261,
P0262, P0263 and
P0264
(Part 3 of 3).
4-90 2009 Sportster Diagnostics: Engine Management
DTCs P0261, P0262, P0263, and P0264 (Part 2 of 3)
Continued from DTCs P0261, P0262, P0263 and
P0264 (Part 1 of 3).
FRONT INJECTOR: DTC P0261 or P0262.
Measure resistance between Breakout Box terminal
21 (W/Y) wire and terminal B of front injector
connector [84B].
Continued from DTCs P0261, P0262, P0263 and
P0264 (Part 1 of 3).
REAR INJECTOR: DTC P0263 or P0264.
Measure resistance between Breakout Box terminal
19 (GN/GY) wire and terminal B of rear injector
connector [85B].
2
3
2
3
Is resistance
less than 0.5 ohm?
YES
NO
Check for continuity between
terminal 10 and ground.
Is continuity present?
Repair open or
poor connection.
Front injector codes:
Check continuity between terminal
21 and terminal 10 or,
Rear injector codes:
Check continuity between terminal
19 and terminal 10.
Is continuity present?
NO
Repair open.
YES
Repair short
to ground.
NO
Check for voltage with key on.
Front injector codes: Check Breakout Box terminal 21.
Rear injector codes: Check Breakout Box terminal 19.
Is voltage present after 2 seconds?
YES
NO
Repair short
to voltage.
Replace ECM.
Reprogram
and learn password.
Clear DTCs using odometer self-diagnostics. See
4.6 ODOMETER SELF-DIAGNOSTICS. Confirm
proper operation with no check engine lamp.
fc01986_en
YES
2009 Sportster Diagnostics: Engine Management 4-91
DTCs P0261, P0262, P0263, and P0264 (Part 3 of 3)
Continued from DTCs P0261, P0262, P0263, and P0264 (Part 1 of 3).
Check for battery voltage at terminal 30 of the system relay.
Is battery voltage present?
YES
NO
Check for battery voltage at terminal
86 of the system relay.
Is battery voltage present?
YES
Measure resistance between
terminal 86 of the system
relay and ECM terminal 13 on
Breakout Box.
Is resistance less than 0.5 ohm?
YES
Measure resistance between
terminal 85 of the system relay
and ECM terminal 2 on Breakout
Box.
Is resistance less than 0.5 ohm?
YES
Install known good relay.
Does fuel pump run for first
2 seconds after key ON?
YES
Replace
relay.
Find and repair open on
(BE/GY) wire between
fuse and relay.
NO
See 4.10 NO ECM
POWER.
NO
Find and repair
open on (W/BK)
wire.
NO
Find and repair
open on (GN/O)
wire.
NO
Reinstall original
relay. Replace ECM.
Reprogram and
learn password.
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
3
fc01987_en
4-92 2009 Sportster Diagnostics: Engine Management
4.21
DTC P0373, P0374
GENERAL
CKP Sensor
. The Crankshaft Position (CKP) sensor (1) is
located on the front of the left engine crankcase. The sensor
harness connector [79] (3) is located under a protective boot
(2) behind the front left frame downtube.
If the CKP sensor signal is weak or absent, DTC P0373 or
P0374 will be set.
NOTE
If signal is not detected or cannot synchronize (DTC P0374),
engine will not start.
2
1
3
ed02855
1.
CKP sensor
2.
Protective boot
3.
Connector [79] (under boot)
Figure 4-43. CKP Sensor Location (typical)
Table 4-32. Code Description
DESCRIPTION
DTC
CKP sensor intermittent
P0373
CKP sensor synch error
P0374
DIAGNOSTICS
TOOL NAME
PART NUMBER
HARNESS CONNECTOR TEST KIT
HD-41404-B
BREAKOUT BOX
HD-43876
Diagnostic Tips
Engine must be cranked for more than five seconds without
CKP signal to set code.
Diagnostic Notes
Each reference number below correlates to a circled number
on the flowchart(s).
1.
Connect BREAKOUT BOX (Part No. HD-43876) to ECM
wire harness only (leave ECM disconnected). See
.
2.
One megohm is very high resistance.
3.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), brown socket probes and patch cords.
4.
For testing purposes, install sensor without running wiring
along normal path. Disconnect and route wiring properly
if system is now OK.
2009 Sportster Diagnostics: Engine Management 4-93
BK
BK
BK
BK
BK
R
BK
R
1
2
1
2
[79B]
CKP
Sensor
[79A]
[78B]
[78A]
12
CKP
sensor
(-)
CKP
sensor
(+)
Ground
30
12
10
Ground
10
30
28
28
ECM
[GND1]
em01211
Figure 4-44. CKP Sensor Circuit
Table 4-33. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Under seat
36-place Packard
ECM
[78]
Front of left crankcase
2-place Mini-Deutsch
CKP sensor
[79]
4-94 2009 Sportster Diagnostics: Engine Management
DTCs P0373 and P0374
Connect Breakout Box to harness only, leaving ECM disconnected. Measure resistance
between terminals 30 and 28 and between terminals 12 and 28 on Breakout Box.
Is resistance more than 1 megohm?
YES
NO
Check for intermittent connection, pinched or
damaged wires, and loose CKP sensor fasteners.
Are there conditions found?
Disconnect connector [79]. Leaving
ECM disconnected, measure resistance
between terminals 12 and 28 and
terminals 30 and 28 on Breakout Box.
Is resistance less than 1 megohm?
YES
Repair as
necessary.
NO
Connect DVOM to terminals 12 and 30
on Breakout Box. Set DVOM to AC volts and crank
engine.
Does DVOM read 1 VAC minimum during cranking?
NO
Connect DVOM at terminals 1 and 2 of
connector [79A].
Does DVOM read 1 VAC minimum while
cranking?
With DVOM still connected,
check for intermittents using
4.8 WIGGLE TEST.
Intermittents present?
YES
Repair as
necessary.
YES
Install known good
CKP sensor. Clear
codes and retest.
DTC P0373 or
P0374 set?
NO
YES
Check for continuity
between terminal 1 of
connector [79B] and
terminal 30 on Breakout
Box.
Is continuity present?
NO
Replace CKP
sensor. See
service manual.
YES
NO
Reinstall original
CKP sensor.
Replace ECM.
Reprogram and
learn password.
Replace CKP
sensor.
YES
NO
Repair open on (BK)
wire between terminal 2
of connector [79B] and
terminal 12 of
connector [78B].
Repair open on (R)
wire between terminal 1
of connector [79B] and
terminal 30 of
connector [78B].
YES
Repair short to
ground on R or
BK wire between
connectors [78B]
and [79B].
NO
Replace CKP
sensor. See
service manual.
Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.
1
2
3
4
fc01850_en
2009 Sportster Diagnostics: Engine Management 4-95
4.22
DTC P0501, P0502
GENERAL
Vehicle Speed Sensor (VSS)
. The VSS is powered and monitored by the
ECM. The ECM processes the vehicle speed signal and
transmits this signal to the TSM/TSSM/ HFSM and speedo-
meter over the serial data circuit.
Table 4-34. Code Description
DESCRIPTION
DTC
VSS low
P0501
VSS high/open
P0502
ed02857
Figure 4-45. Vehicle Speed Sensor and Connector
NOTE
The MAP, TP, jiffy stand, and VSS sensors are connected to
the same reference line (+5V Vref). If the reference line goes
to ground or open, multiple codes will be set (DTC P0107,
P0108, P0122, P0123, P0501, P0502, P01501, P01502). Start
with the trouble code having the lowest ranking value.
DIAGNOSTICS
TOOL NAME
PART NUMBER
HARNESS CONNECTOR TEST KIT
HD-41404-B
BREAKOUT BOX
HD-43876
Diagnostic Notes
Each reference number below correlates to a circled number
on the flowchart(s).
1.
The speedometer has a built-in diagnostic mode. See
2.
Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), black pin probe and patch cord.
3.
Connect BREAKOUT BOX (Part No. HD-43876) between
wire harness and ECM. See
4-96 2009 Sportster Diagnostics: Engine Management
[39B]
BK
BK
R/W
BK/BE
LGN/V
LGN/V
LGN/V
LGN/V
BK/BE
BK/R
R/W
Tachometer-XR
Speedometer-XL
Speedometer-XR
Vehicle
Speed
Sensor
7
7
2
LGN/V
C
A
B
C
A
B
C
2
XR
XL
TSM/TSSM/HFSM
GND 1
TP And
Jiffy Stand Sensor
Data
b
us
5
Ser
ial
Data
Link
V
ehicle
Speed
Sensor
Input
5V
Sensor
P
o
w
er
33
5
10
Ground
10
33
14
14
ECM
[108A]
[108B]
[39A]
[39B]
[78A]
[78B]
[20A]
[20B]
[65B]
[65A]
em01314
Figure 4-46. Vehicle Speed Sensor
Table 4-35. Wire Harness Connectors
LOCATION
TYPE
DESCRIPTION
NO.
Under fuel tank
12-place Molex
Instruments
[20]
Back of speedometer
12-place Packard
Speedometer (XL)
[39]
Back of speedometer
5-place Packard
Speedometer (XR)
[39]
Rear of transmission case
3-place Delphi
VSS
[65]
Under seat
36-place Packard
ECM
[78]
Back of tachometer
12-place Packard
Tachometer (XR)
[108]
2009 Sportster Diagnostics: Engine Management 4-97
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