Harley Davidson Sportster Models 2009. Service Repair Manual - page 49

4.16

DTC P0107, P0108, P0112, P0113

GENERAL

. The Temperature Manifold Absolute Pressure

(TMAP) sensor provides the functions of both an Intake Air
Temperature (IAT) sensor and a Manifold Absolute Pressure
(MAP) sensor in one unit.

The TMAP sensor is supplied 5 volts from ECM terminal "14"
and sends IAT and MAP signals back to ECM terminals "7"
and "25" respectively.

MAP Signal

The MAP signal varies in accordance with engine vacuum and
atmospheric barometric pressure. Changes in barometric
pressure are influenced by weather and altitude.

IAT Signal

The IAT portion of the TMAP sensor is a thermistor device,
meaning that at a specific temperature, it will have a specific
resistance across its terminals. As this resistance varies, so
does the voltage on terminal "7" of the ECM.

•

At high temperatures, the resistance of the IAT sensor is
very low, which effectively lowers the signal voltage on
terminal "7".

•

At low temperatures, the resistance is very high, allowing
the voltage to rise close to 5 volts.

The ECM monitors this voltage to compensate for various
operating conditions.

Table 4-20. Code Description

DESCRIPTION

DTC

MAP sensor open/low

P0107

MAP sensor high

P0108

IAT sensor voltage low

P0112

IAT sensor open/high

P0113

ed02852

Figure 4-32. TMAP Sensor (Typical)

DIAGNOSTICS

TOOL NAME

PART NUMBER

VACUUM PUMP

HD-23738

HARNESS CONNECTOR TEST KIT

HD-41404-B

BREAKOUT BOX

HD-43876

Diagnostic Tips: MAP Sensor

•

DTC P0107 or P0108 will set if the MAP sensor signal is
out of range. DTC P0108 can only be detected with the
engine running.

•

MAP sensor output check. Using the VACUUM
PUMP (Part No. HD-23738), apply a vacuum to the pres-
sure port of the TMAP sensor. The MAP signal voltage
should lower as the vacuum is applied.

•

The TMAP, Jiffy Stand, and TP 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).

Diagnostic Notes: MAP Sensor

Each reference number below correlates to a circled number
on the flowchart(s).

Connect BREAKOUT BOX (Part No. HD-43876) between
wire harness and ECM. See

4.7 BREAKOUT BOX: EFI

Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.

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4-66 2009 Sportster Diagnostics: Engine Management

Diagnostic Tips: IAT Sensor

Check the following conditions:

•

Poor connection: Inspect ECM and harness connector
[78] for backed out terminals, improper mating, inoperative
locks, improperly formed or damaged terminals, poor ter-
minal- to-wire connection and damaged harness.

•

Perform

4.8 WIGGLE TEST

to locate intermittents: If

connections and harness check out OK, use a DVOM to
check the IAT sensor voltage reading while moving related
connectors and wiring harness. If the failure is induced,
the IAT sensor voltage reading will change.

•

Shifted sensor: Refer to

Table 4-21

. This table may be

used to test the intake air temperature sensor at various
temperature levels in order to evaluate the possibility of a
shifted (out-of-calibration) sensor which may result in
driveability problems.

•

An intermittent may be caused by a poor connection,
rubbed through wire insulation or an inoperative wire inside
the insulation.

NOTE

All voltage and resistance values are approximate (20%).
Measure IAT sensor resistance between ECM terminal 7 and
system ground (ECM terminal 26).

Table 4-21. Bosch TMAP Air Temp

DEG F

VOLTs

OHMS

DEG C

-4

4.7

15614

-20

4.5

9426

-10

4.3

5887

4.0

3791

3.6

2511

3.4

2063

3.2

1715

104

2.7

1200

122

2.3

851

140

1.9

612

158

1.5

446

176

1.2

329.5

194

1.0

246.2

212

0.8

186

100

Diagnostic Notes: IAT Sensor

Each reference number below correlates to a circled number
on the flowchart(s).

Connect BREAKOUT BOX (Part No. HD-43876) to EFI
wire harness only (leave ECM disconnected). See

4.7 BREAKOUT BOX: EFI

Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.

Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray socket probes and patch cords.

Replace TMAP sensor. See the service manual.

HOME

2009 Sportster Diagnostics: Engine Management 4-67

To TP Sensor

ECM

To TP Sensor

TMAP

Sensor

MAP

Imput

Sensor

Ground

V/W

R/W

V/W

LGN/Y

BK/W

V/W

R/W

LGN/Y

BK/W

V/W

R/W

LGN/Y

BK/W

BK/R

BK/W

To ET and O2 Sensors

To Jiffy Stand Sensor

R/W

To VSS

[145B]

[145A]

[78A]

[78B]

[80A]

em01206

Figure 4-33. TMAP Sensor Circuit

Table 4-22. Wire Harness Connectors

LOCATION

TYPE

DESCRIPTION

NO.

Under seat

36-place Packard

ECM

[78]

Top of induction module (XL), Side of
induction module (XR)

4-place Packard

TMAP sensor

[80]

Under seat

16-place Molex

Engine Harness

[145]

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4-68 2009 Sportster Diagnostics: Engine Management

DTCs P0107 and P0108 (Part 1 of 2)

Connect Breakout Box. With

ignition ON, measure voltage

between terminal 25 and

terminal 26 on Breakout Box.

With key ON, engine OFF, voltage

must be between 3.5 and 5.0 volts.

With key ON, engine running,

voltage must be between 1.5-3.0

volts at hot idle.

Does voltage fit specifications?

YES

Perform 4.8 WIGGLE TEST

to check for intermittents.

Intermittents present?

YES

Go to DTCs P0107 and P0108

(Part 2 of 2).

Wiggle harness while watching

DVOM.

Replace TMAP sensor. Clear DTCs and

road test.

Did the check engine lamp illuminate and

set DTC P0107 or P0108?

YES

Install original TMAP sensor.

Replace ECM (reprogram,

relearn) and 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.

fc01974_en

Go to DTCs P0107

and P0108 (Part 2

of 2).

HOME

2009 Sportster Diagnostics: Engine Management 4-69

DTCs P0107 and P0108 (Part 2 of 2)

Continued from DTCs P0107 and

P0108 (Part 1 of 2).

Check the 5 volt reference supply at the

TMAP sensor connector [80B]. With

ignition ON, measure voltage between

terminal 3 (R/W) and terminal 1 (BK/W).

Is voltage approximately 5.0 volts?

YES

NO.

Greater

than 6V.

Connect Breakout Box to connector [78B]

leaving ECM disconnected. Check continuity

between TMAP connector [80B] terminal 3

and Breakout Box terminal 14. Then measure

continuity between TMAP connector [80B]

terminal 1 and Breakout Box terminal 26.

Is resistance less than 1 ohm?

NO.

Less

than 4.5V.

Locate short to 12

volts on (R/W)

wire in wire harness.

Repair as necessary.

Connect Breakout Box to connector [78B]

leaving ECM disconnected.

OPEN CHECK:

Measure resistance between TMAP

connector [80B] terminal 4 and Breakout

Box cavity 25.

Is resistance less than 1 ohm?

YES

SHORT CHECK:

Measure resistance

between TMAP connector

terminal 4 and chassis

ground.

Is resistance greater than

1 megohm?

Locate and repair

open on (V/W)

wire.

YES

Replace TMAP sensor.

See service manual.

Locate and repair

grounded (V/W)

wire.

YES

Check resistance between

TMAP connector [80B]

terminal 3 and

Breakout Box terminal 26.

Is resistance greater than

1 megohm?

Repair

open wire.

YES

Replace ECM.

Reprogram and

learn password.

Locate and repair short

between (R/W) and (BK/

W) wires.

Clear DTCs using odometer self-diagnostics. See 4.6 ODOMETER
SELF-DIAGNOSTICS. Confirm proper operation with no check
engine lamp.

fc01975_en

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4-70 2009 Sportster Diagnostics: Engine Management

DTCs P0112 and P0113 (Part 1 of 2)

Connect Breakout Box to connector [78B]

leaving ECM disconnected. With engine at

room temperature (60-90° F or 16-32° C),

use a DVOM to measure resistance across

terminal 7 and 26 on Breakout Box. If

engine is warm, refer to Table 4-21.

Is resistance between 1.5k ohms and 5.0k

ohms at room temperature?

YES

Connect ECM to Breakout Box.

Perform 4.8 WIGGLE TEST to

check for intermittents.

Are intermittents present?

YES

While wiggling harness, perform

steps marked by BOLD

ASTERISKS under DTCs P0112

and P0113 (Part 2 of 2).

Repair as necessary.

Disconnect TMAP sensor connector [80]. Turn

ignition ON. Using a DVOM, measure the

voltage between ECM terminal 7 (positive)

and terminal 26 (negative) on Breakout Box. Is

voltage approximately 5 volts?

YES

NO. Less than

4.7 volts.

Replace TMAP sensor, clear codes

and road test.

Did check engine lamp illuminate

and set DTC P0112 or P0113?

With TMAP sensor disconnected,

disconnect ECM from Breakout Box.

Measure resistance between

Breakout Box terminal 7 and terminal 10

or 28.

Is resistance less than 1 megohm?

Unplug ECM leaving Breakout Box

connected at vehicle harness.

Measure voltage between

Breakout Box terminal 7 and

terminals 10 or 28.

Is voltage 0 volts?

YES

Install original IAT

sensor, replace ECM,

perform password

learning and road test.

System

OK.

Repair short to

ground on

(LGN/Y) wire.

Replace ECM.

Reprogram

and

learn

password.

Replace

ECM.

Reprogram

and

learn

password.

Examine IAT

signal wire

(LGN/Y) for

short to voltage

and repair.

At some point in the flowchart you may be instructed to jump directly to a the box with the bold
asterisk. Disregard the asterisk (but not the instruction box) if your normal progression through
the chart brings you to this location.

Clear DTCs using odometer self-diagnostics. See 4.6 ODOMETER
SELF-DIAGNOSTICS. Confirm proper operation with no check
engine lamp.

fc01976_en

Go to DTCs P0112 and

P0113 (Part 2 of 2).

HOME

2009 Sportster Diagnostics: Engine Management 4-71

DTCs P0112 and P0113 (Part 2 of 2)

Continued from DTCs P0112 and P0113 (Part 1 of 2).

Disconnect TMAP sensor connector [80B] and examine for damage.

Is connector OK?

YES

Repair

connector.

Using a DVOM, measure the resistance between TMAP sensor

connector [80B] terminal 2 and ECM terminal 7 on Breakout Box.

Is resistance less than 1.0 ohm?

YES

Using a DVOM, measure the resistance between TMAP sensor

connector [80B] terminal 1 and ECM terminal 26 on Breakout Box.

Is resistance less than 1.0 ohm?

YES

Using a DVOM, measure the resistance between ECM terminal 7

and terminal 26 on Breakout Box.

Is resistance greater than 1.0 megohm?

YES

Using a DVOM, measure the resistance between ECM terminal 7 on

Breakout Box and ground.

Is resistance greater than 1.0 megohm?

YES

Remove TMAP sensor and measure resistance across the 1 and 2

terminals of the TMAP sensor Directly with sensor at room

temperature (60-90° F or 16-32° C),

Is resistance between 2.0k ohms and 5.0k ohms?

YES

Perform 4.8 WIGGLE TEST on steps marked with a BOLD

ASTERISK above to locate intermittents.

Repair as necessary.

Examine (LGN/Y) wire in harness

for open circuit and repair.

Examine (BK/W) wire in harness

for open circuit and repair.

Examine (LGN/Y) and (BK/W)

wires in harness for short between

these two circuits and repair.

Examine harness

for short to ground

and repair.

Replace

TMAP sensor.

At some point in the flowchart you may be
instructed to jump directly to a the box with the
bold asterisk. Disregard the asterisk (but not the
instruction box) if your normal progression
through the chart brings you to this location.

Clear DTCs using odometer self-diagnostics. See
4.6 ODOMETER SELF-DIAGNOSTICS. Confirm
proper operation with no check engine lamp.

fc01977_en

HOME

4-72 2009 Sportster Diagnostics: Engine Management

4.17

DTC P0117, P0118

GENERAL

ET Sensor

The ECM supplies and monitors a voltage signal (terminal "6")
to one side of the Engine Temperature (ET) sensor. The other
side of the ET sensor is connected to a common sensor ground
(terminal "26") of the ECM.

See

Figure 4-34

. The ET sensor is a thermistor device, which

means that at a specific temperature it will have a specific
resistance across its terminals. As this resistance varies, so
does the voltage (terminal "6").

•

At high temperatures, the resistance of the sensor is very
low, which effectively lowers the signal voltage on terminal
"6".

•

At low temperatures, the resistance is very high, allowing
the voltage to rise close to 5 volts.

The ECM monitors this voltage to compensate for various
operating conditions. The ECM also uses the sensor input as
a reference for determining IAC pintle position.

ed02853

Figure 4-34. Engine Temperature Sensor

Table 4-23. Code Description

DESCRIPTION

DTC

ET sensor voltage low

P0117

ET sensor open/high

P0118

DIAGNOSTICS

TOOL NAME

PART NUMBER

HARNESS CONNECTOR TEST KIT

HD-41404-B

BREAKOUT BOX

HD-43876

Diagnostic Tips

Once the engine is started, the ET voltage should lower steadily
in two stages.

Check the following conditions:

•

Perform

4.8 WIGGLE TEST

to locate intermittents: If

connections and harness check out OK, use a DVOM to
check the engine temperature sensor voltage reading
while moving related connectors and wiring harness. If
the failure is induced, the engine temperature sensor
voltage reading will change.

•

Shifted sensor: Refer to

Table 4-24

. This table may be

used to test the engine temperature sensor at various
temperature levels in order to evaluate the possibility of a
shifted (out-of-calibration) sensor which may result in
driveability problems.

•

An intermittent may be caused by a poor connection,
rubbed through wire insulation or an inoperative wire inside
the insulation.

NOTE

All voltage and resistance values are approximate (±20%).
Measure ET sensor resistance between ECM terminal 6 and
system ground (ECM terminal 26).

Table 4-24. ET Sensor Table

TEMP °F

HOT

VOLTAGE

COLD

VOLTAGE

RESIST-

ANCE

TEMP °C

-4

4.9

98936

-20

4.8

56102

-10

4.5

32957

4.3

20000

3.9

12511

3.6

10000

3.4

8045

104

2.9

5304

122

2.4

3577

140

1.9

2470

158

1.5

1739

176

4.0

1.2

1246

80*

194

3.7

0.9

907.7

90*

212

3.4

671.2

100

* Between 80-90 °C the ECM changes scaling. Voltages for
ECT sensor will shift scales in that range. This provides proper
sensor resolution for all temperatures.

Diagnostic Notes

Each reference number below correlates to a circled number
on the flowchart(s).

HOME

2009 Sportster Diagnostics: Engine Management 4-73

Connect BREAKOUT BOX (Part No. HD-43876) to EFI
wire harness only (leave ECM disconnected). See

4.7 BREAKOUT BOX: EFI

Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.

Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray socket probes and patch cords.

Replace ET sensor. See the service manual.

Sensor

Input

Sensor

Ground

ECM

Sensor

To TP, TMAP Sensors And Jiffy Stand Sensor

PK/Y

BK/W

PK/Y

[78B]

[78A]

[90A]

[90B]

em01207

Figure 4-35. ET Sensor Circuit

Table 4-25. Wire Harness Connectors

LOCATION

TYPE

DESCRIPTION

NO.

Under seat

36-place Packard

ECM

[78]

Above throttle body, right side

2-place Delphi

ET sensor

[90]

HOME

4-74 2009 Sportster Diagnostics: Engine Management

DTCs P0117 and P0118 (Part 1 of 2)

Connect Breakout Box to connector

[78B] leaving ECM disconnected. With

engine at room temperature (60-90° F

or 16-32° C), use a DVOM to measure

resistance across terminals 6 and 26

on Breakout Box. If engine is warm,

refer to Table 4-24.

Is resistance between 8.0k ohms and

20k ohms?

YES

Connect ECM to Breakout Box.

Perform 4.8 WIGGLE TEST to

check for intermittents.

Are intermittents present?

YES

While wiggling harness, perform

steps marked by BOLD

ASTERISKS under DTCs P0117

and P0118 (Part 2 of 2).

Repair as necessary.

Disconnect ET sensor connector

[90]. Turn ignition ON. Using a

DVOM, measure the voltage

between terminal 6 (positive) and

terminal 26 (negative) on Breakout

Box.

Is voltage approximately 5 volts?

YES

NO. Less than

4.7 volts.

NO. Greater than

5.3 volts.

Replace ET sensor, clear DTCs

and road test.

Did check engine lamp illuminate

and set DTC P0117 or P0118?

With ET sensor disconnected,

disconnect ECM connector [78B].

Measure resistance between terminal 6

and terminals 10 or 28.

Is resistance less than 1 megohm?

Unplug ECM leaving Breakout Box

connected at vehicle harness.

Measure voltage between terminal

6 and terminals 10 or 28.

Is voltage 0 volts?

YES

Install original

ET sensor,

replace ECM,

perform

password learning

and road test.

System

OK.

Repair short to

ground on

PK/Y wire.

Replace ECM.

Reprogram

and

learn

password.

Replace ECM.

Reprogram

and

learn

password.

Examine ET signal

wire (PK/Y) for

short to voltage

and repair.

At some point in the flowchart you may be instructed to jump directly to a
the box with the bold asterisk. Disregard the asterisk (but not the instruction
box) if your normal progression through the chart brings you to this location.

Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.

fc01978_en

Go to DTCs P0117 and

P0118 (Part 2 of 2).

HOME

2009 Sportster Diagnostics: Engine Management 4-75

DTCs P0117 and P0118 (Part 2 of 2)

Continued from DTCs P0117 and P0118 (Part 2 of 2).

Disconnect ET sensor connector [90B] and examine for damage.

Is connector OK?

YES

Repair

connector.

Using a DVOM, measure the resistance

between ET sensor connector [90B] terminal 1 and

ECM terminal 6 on Breakout Box.

Is resistance less than 1.0 ohm?

YES

Using a DVOM, measure the resistance

between ET sensor connector [90B] terminal 2 and

ECM terminal 26 on Breakout Box.

Is resistance less than 1.0 ohm?

YES

Using a DVOM, measure the resistance between ECM

terminal 6 and terminal 26 on Breakout Box.

Is resistance greater than 1.0 megohm?

YES

Using a DVOM, measure the resistance between ECM

terminal 6 on Breakout Box and ground.
Is resistance greater than 1.0 megohm?

YES

Remove ET sensor and measure resistance across the terminals of the ET

sensor directly. Again, with sensor at room temperature (60-90° F or 16-32° C).

Is resistance between 8.0k ohms and 20k ohms?

YES

Perform 4.8 WIGGLE TEST on steps marked with a

BOLD ASTERISK above to locate intermittents.

Repair as necessary.

Examine (PK/Y) wire in harness

for open circuit and repair.

Examine (BK/W) wire in harness

for open circuit and repair.

Examine (PK/Y) and (BK/W) wires

in harness for short between these

two circuits and repair.

Examine harness

for short to ground

and repair.

Replace

ET sensor.

At some point in the flowchart you may be instructed to jump directly to a the box
with the bold asterisk. Disregard the asterisk (but not the instruction box) if your
normal progression through the chart brings you to this location.

Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.

fc01979_en

HOME

4-76 2009 Sportster Diagnostics: Engine Management

4.18

DTC P0122, P0123

GENERAL

TP Sensor

The ECM supplies a 5 Volt signal (terminal 14) to the TP
sensor. The TP sensor sends a signal back to the ECM (ter-
minal 24). The returned signal varies in voltage according to
throttle position.

•

At idle (closed throttle), the signal is typically in the range
of 0.20-0.80 Volts.

•

At wide open throttle, the signal is normally 4.0-4.9 Volts.

A DTC P0122 or P0123 will set if the TP sensor voltage signal
does not fall within the acceptable range.

NOTE

When servicing the TP sensor connector on XR models only,
apply Harley-Davidson Electrical Contact Lubricant to the TP
sensor connector terminals prior to connecting the TP sensor.

Table 4-26. Code Description

DESCRIPTION

DTC

TP sensor open/low

P0122

TP sensor high

P0123

ed02854

Figure 4-36. TP Sensor Location (XL)

ed01768

Figure 4-37. TP Sensor Location (XR)

DIAGNOSTICS

TOOL NAME

PART NUMBER

HARNESS CONNECTOR TEST KIT

HD-41404-B

BREAKOUT BOX

HD-43876

Diagnostic Tips

The DVOM reads throttle position in volts. Voltage should
increase at a steady rate as the throttle is moved from idle to
wide open. A short to ground or open on the (GY/V) or (R/W)
wires also will result in a DTC P0122. A short to ground or open
on the (R/W) wire (+5v REF) sets multiple codes as described
below.

NOTES

The TMAP, Jiffy Stand, and TP 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, P1501, P1502). Start with the trouble code
having the lowest ranking value.

Check for the following conditions:

•

Poor Connection: Inspect ECM and harness connector
[78B] for backed out terminals, improper mating, inoper-
ative locks, improperly formed or damaged terminals, poor
terminal- to-wire connection and damaged harness.

•

Perform

4.8 WIGGLE TEST

to locate intermittents: If

connections and harness check out OK, monitor TP sensor
voltage using a DVOM while moving related connectors

HOME

2009 Sportster Diagnostics: Engine Management 4-77

and wiring harness. If the failure is induced, the TP sensor
voltage reading will change.

•

TP sensor scaling: Observe the TP sensor voltage display
while opening the throttle with engine stopped and Ignition
Switch ON. Display should vary from closed TP sensor
voltage (when throttle is closed) to greater than 4.0 volts
(when throttle is held wide open). As the throttle is slowly
moved, the voltage should change gradually without spikes
or low voltages being observed.

•

Check TP sensor voltage reading with DVOM. If TP sensor
is equal to or greater than 3.8 volts then the system is in
"clear flood" mode and engine will not start. While spark
is present, fuel is shut off. Problem can be mechanical,
such as stuck throttle cables.

Diagnostic Notes

Each reference number below correlates to a circled number
on the flowchart(s).

Connect a BREAKOUT BOX (Part No. HD-43876) between
EFI wire harness and ECM before measuring voltage. See

4.7 BREAKOUT BOX: EFI

. Using a DVOM to measure

voltage, take reading across terminal 24 (positive lead)
and terminal 26 (negative lead) on BREAKOUT BOX (Part
No. HD-43876).

Replace TP sensor. See the service manual.

Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404-B), gray pin probes and patch cords.

R/W

BK/W

GY/V

To TMAP Sensor

Sensor

To ET And O2 Sensors

To TMAP Sensor

R/W

To Jiffy Stand Sensor

To VSS

Sensor

Ground

Sensor

Input

ECM

BK/R

[78B]

[78A]

[145B]

[145A]

[88A]

[88B]

em01208

Figure 4-38. TP Sensor Circuit

HOME

4-78 2009 Sportster Diagnostics: Engine Management

Table 4-27. Wire Harness Connectors

LOCATION

TYPE

DESCRIPTION

NO.

Under seat

36-place Packard

ECM

[78]

Behind air cleaner housing

3-place Delphi

TP sensor

[88]

Under seat

16-place Molex

Engine harness

[145]

HOME

2009 Sportster Diagnostics: Engine Management 4-79

DTCs P0122 and P0123 (Part 1 of 2)

With ignition key ON, measure TP sensor voltage while gradually opening throttle.

Does voltage increase steadily with no spikes or low voltages from 0.2-0.8 volts at idle (closed

throttle) to 4.0-4.9 volts at wide open throttle?

YES

Voltage is

greater than.

Voltage is lower

than or spikes

observed.

Unplug TP sensor connector [88B]

and measure voltage between

terminal B (+) and terminal A (-)

with ignition ON.

Is reading 4.8-5.0 volts?

YES

Disconnect ECM from Breakout
Box. Check resistance between

ECM terminal 24 on Breakout Box

to chassis ground.

Is resistance greater than 1

megohm?

Measure resistance

between TP sensor

connector [88B]

terminal B to ECM terminal

14 on Breakout Box.

Is resistance less than 1.0

ohm?

Find short to

ground on (GY/V)

signal wire.

YES

Replace

TP sensor.

Repair open

in (R/W) wire.

YES

Repair open

in (BK/W) wire.

Check engine lamp ON

continuously and

DTC P0122 or P0123

the only one set?

YES

Replace ECM.

Reprogram and

learn password.

Perform 4.8 WIGGLE

TEST to check for

intermittents.

Are intermittents present?

Replace TP sensor, clear

codes and road test.

Did check engine lamp
illuminate and set DTC

P0122 or P0123?

YES

While wiggling harness,

Go to DTCs P0122 and

P0123 (Part 2 of 2).

Repair as necessary.

YES

Install original

TP sensor, replace ECM

(reprogram and learn

password) and road test.

System

OK.

Clear DTCs using odometer self-diagnostics. See
4.6 ODOMETER SELF-DIAGNOSTICS. Confirm
proper operation with no check engine lamp.

fc01980_en

Go to DTCs

P0122 and P0123

(Part 2 of 2).

HOME

4-80 2009 Sportster Diagnostics: Engine Management

DTCs P0122 and P0123 (Part 2 of 2)

Continued from DTCs P0122 and P0123 (Part 1 of 2).

With ignition key OFF, disconnect ECM connector [78B]. Turn ignition key

ON.

Is voltage greater than 0 volts across terminal 24 and terminal 26 on

Breakout Box?

YES

Repair short

between (GY/V) signal

wire and 12 volts.

Measure resistance between ECM terminal 24

on Breakout Box and TP sensor connector [88B]

terminal C.

Is resistance less than 0.5 ohm?

YES

Measure resistance from TP sensor

connector [88B]

terminal C to terminal B.

Is resistance less than 1.0 megohm?

Repair open

(GY/V)

signal wire.

YES

Repair short

between (R/W)

and (GY/V) signal

wire.

Replace

TP sensor.

Clear DTCs using odometer self-diagnostics. See 4.6
ODOMETER SELF-DIAGNOSTICS. Confirm proper
operation with no check engine lamp.

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