All system problems fall into at least one of three general categories.
No Start
The engine cranks over freely, but will not start. This does not
include situations where the engine will not crank, such as a
bad starter, dead battery, etc. This condition assumes that all
obvious checks (fuel in tank, etc.) have been made.
Poor Performance
The engine starts but there are performance problems. These
problems may include poor fuel economy, rough idle, engine
misfire, engine hesitation, severe spark knock, etc.
Check Engine Lamp
See Figure 4-2. The check engine lamp indicates the ignition
control module (ICM) has determined a fault condition exists.
There may also be starting or performance problems.
60
50
40
30
20
MPH
10
0
C
E
E
R
I
T
F
I
H
A
R
L
E
V
Y
-
A
D
Check Engine Lamp
Figure 4-2. Speedometer
70
80
90
100
110
120
D
N
O
S
D
I
20
10
0
H
30
A
RPM
R
L
E
40
x100
Y
-
A
D
f2160x8x
5
O
S
D
I
V
RESOLVING PROBLEMS
To resolve system problems, five basic steps are involved. In
order of occurrence, they are:
1. Check for diagnostic trouble codes (DTCs) by observing
check engine lamp. See 4.3 CHECKING FOR TROUBLE
CODES.
2. Retrieve DTCs using speedometer self diagnostics. See
4.5 SPEEDOMETER SELF DIAGNOSTICS.
3. Diagnose system problems. This involves using special
tools and the diagnostic flow charts in this section.
4. Correct problems through the replacement and/or repair
of the affected components.
5. After repairs are performed, the work must be validated.
This involves clearing the DTCs and confirming proper
vehicle operation as indicated by the behavior of the
check engine lamp.
4-22004 Touring: Engine Management (Carbureted)
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f1240x2x
CHECKING FOR TROUBLE CODES4.3
CHECK ENGINE LAMP
To diagnose system problems, start by observing the behavior of the check engine lamp.
NOTE
●
See Figure 4-3. “Key ON” means that the ignition key is
turned to ON and the engine stop switch is set to RUN
(although the engine is
●
When the ignition switch is turned ON, the check engine
lamp will illuminate for approximately four seconds and
then turn off.
●
If the check engine lamp is not illuminated at key ON or if
it fails to turn OFF after the ititial four second period, then
see 4.5 SPEEDOMETER SELF DIAGNOSTICS.
●
If the check engine lamp comes on late (after 20 seconds), the problem is likely a serial data bus failure. Test
for codes using speedometer self diagnostics. See 4.5
SPEEDOMETER SELF DIAGNOSTICS.
●
If the check engine lamp fails to turn OFF after the initial
four second period, then a problem exists in the instrumentation. See 4.5 SPEEDOMETER SELF DIAGNOS-
TICS.
1. When the lamp turns off after being illuminated for the
first four second period, it will:
a. Remain off if there are no fault conditions or trouble
codes currently detected by the ignition control module. See A of Figure 4-4.
b. Come back on for an 8 second period if only historic
codes exist. See B of Figure 4-4.
not
running).
Figure 4-3. Ignition Switch (FLHT/C)
c. Come back on, and remain on, if a current trouble
code exists. See C of Figure 4-4.
2. See CODE TYPESwhich follows for a complete description of trouble code formats.
NOTE
Tr ouble codes relating to the ignition coil can only be fully
diagnosed during actuation. For example, a problem with the
ignition coil will be considered a current fault even after the
problem is corrected, since the ignition control module will not
know of its resolution until after the coil is exercised by vehicle
start sequence. In this manner, there may sometimes be a
false indication of the current trouble code.
ON
OFF
ON
OFF
ON
OFF
A
Key On
B
Key On
C
Key On
4 Sec.
Lamp OFF: No Current or Historic Trouble Codes
Lamp ON 8 Seconds:
Only Historic Trouble Codes Exist
4 Sec.
4 Sec.
8 Sec.
Lamp Remains ON: Current Trouble Code *
4 Sec.
4 Sec.
Figure 4-4. Check Engine Lamp Operation
*
Historic Trouble Codes May Also Exist
2004 Touring: Engine Management (Carbureted)4-3
Lamp OFF
HOME
CODE TYPES
There are two types of
current and historic. If a trouble code is stored, it can be read
using the speedometer self diagnostics. See 4.5 SPEEDOM-
ETER SELF DIAGNOSTICS.
All trouble codes reside in the memory of the ignition control
module (ICM) until cleared using the speedometer self diagnostics. See 4.5 SPEEDOMETER SELF DIAGNOSTICS.
A trouble code is also cleared after a total of 50 trips has
elasped. A trip consists of a start and run cycle, the run cycle
lasting at least 30 seconds. After the 50 trip retention period,
the trouble code is automatically erased from memory providing that no subsequent faults of the same type are detected in
that period.
Current
Current trouble codes are those which presently disrupt
motorcycle operation. See the appropriate flow charts for
solutions.
Historic
If a particular problem happens to resolve itself, the active
status is dropped and it becomes a historic fault rather than a
current fault.
Historic trouble codes can only be retrieved using a computer
based diagnostic package called DIGITAL TECHNICIAN
(Part No. HD-44750).
Historic trouble codes are stored for a length of time to assist
in the diagnosis of intermittent faults.
diagnostic trouble codes (DTCs):
RETRIEVING DIAGNOSTIC
TROUBLE CODES
The engine management system provides two levels of diagnostics.
●
The most sophisticated mode employs a computer
based diagnostic package called DIGITAL TECHNICIAN
(Part No. HD-44750).
The second mode requires using the speedometer self
●
diagnostics. Speedometer, tachometer (if equipped),
TSM/TSSM and ECM codes can be accessed and
cleared. See 4.5 SPEEDOMETER SELF DIAGNOS-
TICS.
MULTIPLE DIAGNOSTIC TROUBLE
CODES
While it is possible for more than one fault to occur and set
more than one trouble code, there are several conditions
which may result in
Serial data codes (DTC U1016, U1064, U1097, U1255,
●
U1300 and U1301) may be accompanied by other
codes.
resolving the other codes.
For proper resolution to multiple trouble codes refer to diagnostic code priority chart (Table 4-5.)
one
fault setting
Always
correct the serial data codes before
multiple
trouble codes:
It is important to note that historic trouble codes may also be
present whenever the system indicates the existence of a
current fault. See MULTIPLE DIAGNOSTIC TROUBLE
CODES if multiple trouble codes are found.
Diagnostic charts are designed for use with current trouble
codes and as a result they frequently suggest part replacement.
4-42004 Touring: Engine Management (Carbureted)
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INITIAL DIAGNOSTIC CHECK: ICM4.4
GENERAL
To locate faulty circuits or other system problems, follow the
diagnostic flow charts in this section. For a systematic
approach, always begin with INITIAL DIAGNOSTICS which
follows. Read the general information and then work your way
through the flow chart box by box.
Diagnostic Notes
If a numbered circle appears adjacent to a flow chart box,
then more information is offered in the diagnostic notes. Many
diagnostic notes contain supplemental information, descriptions of various diagnostic tools or references to other parts
of the manual.
Circuit Diagram/Wire Harness Connector
Table
When working through a flow chart, refer to the illustrations,
the associated circuit diagram and the wire harness connector table as necessary. The wire harness connector table for
each circuit diagram identifies the connector number, description, type and general location.
In order to perform most diagnostic routines, a Breakout Box
and a DVOM are required. See 4.6 BREAKOUT BOX: ICM.
To perform the circuit checks with any degree of efficiency, a
familiarity with the various wire connectors is necessary.
Reprogramming ICM
Diagnostic charts frequently suggest ICM replacement. In the
event an ignition control module (ICM) needs to be replaced,
it must be reprogrammed using a computer based diagnostic
package called DIGITAL TECHNICIAN (Part No. HD-44750).
See your dealer. Password learn procedure must also be performed. See 3.24 PASSWORD LEARN.
INITIAL DIAGNOSTICS
General Information
The diagnostic check is an organized approach to identifying
a problem caused by an electronic control system malfunction. If no problems are found after completion of the diagnostic check, a comparison of running parameters may be used
to help locate intermittents and out-of-specification sensors.
See Ta ble 4-1.
Diagnostic Tips
If Speedometer reads “BUS Er” with the ignition key
●
turned ON (engine stop switch at RUN with the engine
off), check data bus for an open or short to ground
between data connector [91A] terminal 3 and ICM connector [10B] terminal 12, TSSM connector [30B] terminal
3, Speedometer connector [39B] terminal 2 or tachometer (if equipped) connector [108B] terminal 2.
Check for an open diagnostic test terminal between data
●
link connector [91A] terminal 3 and TSM/TSSM connector [30B] terminal 3. With ignition keyturned ON, serial
data bus voltage should be typically 0.6-0.8 volts. The
range of acceptable voltage is 0-7.0 volts.
Diagnostic Notes
The reference numbers below correlate with the circled numbers on the diagnostic check flow charts. See page 4-10.
1. Compare engine behavior to symptoms tables in this
section.
a. Starts hard. See Ta ble 4-2.
b. Hesitates, stumbles, surges, misfires and/or slug-
gish performance. See Ta bl e 4-3.
c. Engine exhaust emits black smoke or fouls plugs.
See Ta bl e 4-4.
2. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), black socket probes and patch cord.
3. Connect BREAKOUT BOX (Part No. HD-42682) to igni-
tion control module. See 4.6 BREAKOUT BOX: ICM.
All diagnostic codes are listed in Ta bl e 4-5.
See 3.9 INITIAL DIAGNOSTIC CHECK: TSM/TSSM for any
codes related to the turn signal module (TSM) or turn signal
security module (TSSM).
See 2.5 BREAKOUT BOX: SPEEDOMETER for any codes
related to the speedometer.
2004 Touring: Engine Management (Carbureted)4-5
HOME
Table 4-1. Typical Running Values
ITEM
MAP sensor
RPM056001000
Bank angle
sensor
MIN.
VALUE
0.1 V
(high
vacuum)
Run mode
0.45-1.1 V
MAX.
VALUE
4.96 V
(atmo-
spheric
pressure)
Disable
1.8-3.2 V
HOT
IDLE
1.5-3.0 V
Run mode
0.45-1.1 V
Table 4-2. Engine Starts Hard
SYMPTOM
Battery discharged
Spark plugs4.12 MISFIRE.
Spark plug wires4.12 MISFIRE
Ignition coil4.12 MISFIRE.
Valve sticking
Water or dirt in fuel system Drain and refill with fresh fuel.
See charging system troubleshooting in this section.
See Section 3 in Touring Service Manual.
SOLUTION
Table 4-3. Engine Performance Problems
SYMPTOM
Perform intake leak test.
Manifold leak
MAP sensor plugged or not
operating properly
Water or dirt in fuel system
Spark plugs4.12 MISFIRE.
EVAP hose disconnected
from induction module (CA)
Throttle plates not opening
fully
See 4.8 INTAKE LEAK
TEST.
4.13 DTC P0106, P0107,
P0108
Drain and refill with fresh
fuel.
Connect.
See throttle cable adjustment in Touring Service
Manual.
SOLUTION
Table 4-4. Engine Exhaust Emits
Black Smoke or Fouls Plugs
SYMPTOM
Clogged air filter
See Section 1 in Touring
Service Manual.
SOLUTION
4-62004 Touring: Engine Management (Carbureted)
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Table 4-5. Diagnostic Trouble Codes (DTC) and Fault Conditions
TSM/TSSM disabled fuel due to no password (starts then stalls)
crankshaft position sensor not detected/
cannot synchronize
4.15 DTC P1009, P1010
4.15 DTC P1009, P1010
4.17 DTC P0373, P0374
2004 Touring: Engine Management (Carbureted)4-7
HOME
[2A]
[2B]
f2208z8x
321654987121110
321654987121110
Speedometer
15A
Accessory
Fuse
321654987121110
321654987121110
Main to Interconnect
Harness
BK
LtGN/V
O
BN/GY
[39B]
[39A]
[108B]
[108A]
321654987121110
321654987121110
Tachometer
[1B] [1A]
123
123
Main to Interconnect
Harness
6
6
10111278945
10111278945
[156B] [156A]
6
6
5
5
4
4
3
3
2
2
1
1
BN/GY
Main to Interconnect
Harness
LtGN/V
GY
65
4
32
1
1
15A
Ignition
Fuse
6
5
4
32
GY
987
987
321654987121110
321654987121110
TSM/TSSM
BK
[8B]
121110
121110
[8A]
Ignition
Harness
1
2
3
4
Data Link
[91A]
BK
[30B]
[30A]
LtGN/V
15A
Battery
Fuse
[10B]
[10A]
Ignition Control Module
12
12
Serial data
Figure 4-5. Diagnostic Check (FLHT/C)
Table 4-6. Wire Harness Connectors in Figure 4-5.
NO.DESCRIPTIONTYPELOCATION
[1]Main to Interconnect Harness12-Place Deutsch (Black)Inner Fairing - Right Radio Support Bracket
[2]Main to Interconnect Harness12-Place Deutsch (Gray)Inner Fairing - Right Fairing Support Brace
[8]Ignition Harness12-Place DeutschUnder Right Side Cover
[10]Ignition Control Module 12-Place DeutschUnder Right Side Cover
[30]Turn Signal/Security Module12-Place Deutsch
[39]Speedometer12-Place Packard Inner Fairing (Back of Speedometer)
[91]Data Link4-Place DeutschUnder Right Side Cover
[108]Tachometer12-Place Packard Inner Fairing (Back of Tachometer)
[156]Main to Interconnect Harness6-Place DeutschInner Fairing - Right Fairing Support Brace
Cavity in Crossmember at Rear of
Battery Box (Under Seat)
4-82004 Touring: Engine Management (Carbureted)
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f2208y8x
BN/GY
BK
321654987121110
321654987121110
15A
Battery
Fuse
Speedometer
LtGN/V
BN/GY
O
15A
Accessory
Fuse
[39B]
[39A]
15A
Ignition
Fuse
LtGN/V
GY
21
21
GY
BK
321654987121110
321654987121110
[30B]
[30A]
TSM/TSSM
BK
[8B]
[8A]
[91A]
Ignition
Harness
1
2
3
4
Data Link
987
6
54
3
98
7
654
3
121110
121110
LtGN/V
[10B]
[10A]
Ignition Control Module
12
12
Serial data
Figure 4-6. Diagnostic Check (FLHR/S)
Table 4-7. Wire Harness Connectors in Figure 4-6.
NO.
[8]Ignition Harness12-Place DeutschUnder Right Side Cover
[10]Ignition Control Module 12-Place DeutschUnder Right Side Cover
[30]Turn Signal/Security Module12-Place Deutsch
[39]Speedometer12-Place Packard Under Console (Back of Speedometer)
[91]Data Link4-Place DeutschUnder Right Side Cover
DESCRIPTIONTYPELOCATION
Cavity in Crossmember at Rear of
Battery Box (Under Seat)
2004 Touring: Engine Management (Carbureted)4-9
HOME
Initial Diagnostic Check (Part 1 of 2)
Does engine
start?
YES.
Starts and
runs.
Check for trouble
codes. See 4.5
1
SPEEDOMETER
SELF DIAGNOSTICS
Codes found?
YES
Refer to applicable trouble code priority chart.
All diagnostic codes are listed on page 4-7 in
Table 4-5. Codes are listed by priority.
YES.
Starts, then
stalls.
See 4.10 STARTS, THEN
STALLS.
YES
STOP
Go to Initial Diagnostic
Check (Part 2 of 2).
NO.
Cranks, but
will not start.
See 4.9 ENGINE CRANKS,
BUT WILL NOT START.
NO
With ignition switch OFF, press and
release odometer reset switch. Does
odometer display appear?
Check for continuity to ground on terminal 7
of speedometer. Wiggle harness during con-
tinuity check. Continuity present?
YESNO
Check for battery voltage at
terminal 5 of speedometer
while wiggling harness. Bat-
tery voltage continuously
present?
NO
NO.
Engine will not
crank.
See 1.2 STARTING SYSTEM
DIAGNOSIS.
Locate and
repair open.
Check continuity (with ignition
switch OFF) between terminals
8 and 11 on breakout box. Con-
tinuity present when speedome-
ter reset switch is depressed?
Replace speedometer.
4-102004 Touring: Engine Management (Carbureted)
YES
Replace speedometer
reset switch.
NO
Locate and
repair open.
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