Checking 2000-2003 Big Twin diagnostic codes

2000-2003

1. Remove right side saddlebag and side cover if so equipped. Remove protective plug from data link connector. Other models will be under the seat.

2. To activate the diagnostic feature,follow these steps.

a. Create diagnostic test wire or use a female spade clip which will bridge the two terminals perfectly.

b. Install diagnostic test wire/clip across Terminals 1 and 2 on the data link connector, they are marked.

c. Turn Ignition/Light Key Switch to IGNITION and wait approximately 10 seconds (4 seconds lamp ON, 6 seconds lamp OFF) for check engine lamp to start flashing.

3. All trouble codes are sent out as a series of flashes. To retrieve the first digit of the trouble code simply observe the number of times the lamp flashes.

a. The lamp will then flash one or more times to indicate the first digit of the trouble code.

b. The length of time the lamp is illuminated and the length of time in which it is off are each about 0.5 second in duration.

4. The second digit follows:

a. Following the transmission of the first digit, there is a 1.2 second pause in which the lamp is off.

b. The lamp will then flash one or more times to indicate the second digit of the trouble code. Count the number of times the lamp flashes to retrieve the second digit.

5. If more than one trouble code is sent:

a. Following transmission of the second digit of the first code, there is a 3 second pause in which the lamp is off.

b. Once all codes have been sent, the data string is repeated. When you have recorded the same trouble code twice, it is an indication that the transmission has been restarted and that all trouble codes have been retrieved.

IMPORTANT NOTE ..If diagnostic test wire is installed across Pins 1 and 2 on connector in lieu of a Scanalyzer, the ECM is placed in a diagnostic test mode and the engine will start. The test wire must be removed from the data connector and the ignition switch turned OFF or the check engine lamp will continue to flash codes. A historic trouble code resides in the memory of the ECM until the code is cleared by use of the Scanalyzer or a total of 50 trips has elapsed. 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 (that is, assuming no subsequent faults of the same type are detected in that period). The numbers after the 'historic' or 'current' is the speedo code number, but without the electrical diagnostics manual you're not going to know what they mean.

The code numbers are the numbers that appear in red.

1 Current 53 ECM flash error

2 Historic 53 ECM flash error

3 Current 54 ECM EEPROM error

4 Historic 54 ECM EEPROM error

5 Current 63 ECM serial data low

6 Current 63 ECM serial data open/high

7 Current 63 TSSM serial data low

8 Current 63 TSSM serial data open/high

9 Current 61 Loss of TSM/TSSM serial data

10 Current 14 Loss of all ECM serial data (state of health)10 24 Loss of vehicle speed10 33 Loss of vehicle inhibit motion10 43 Loss of powertrain security status

11 Current 33 System relay contacts open

12 Current 33 System relay coil high/shorted

13 Current 33 System relay coil open/low

14 Current 33 System relay contacts closed

15 Current 99 Incorrect password

16 Current 99 Missing password

17 Current 41 CKP sensor intermittent

18 Current 41 CKP sensor synch error

19 Current 11 TP sensor open/low

20 Current 11 TP sensor high

21 Current 12 MAP sensor open/low

22 Current 12 MAP sensor high

23 Current 14 ET sensor voltage low

24 Current 14 ET sensor open/high

25 Current 15 IAT sensor voltage low

26 Current 15 IAT sensor open/high

27 Current 24 Front ignition coil open/low

28 Current 25 Rear ignition coil open/low

29 Current 24 Front ignition coil high/shorted

30 Current 25 Rear ignition coil high/shorted

31 Current 24 Front cylinder combustion intermittent

32 Current 25 Rear cylinder combustion intermittent

33 Current 23 Front injector open/low

34 Current 32 Rear injector open/low

35 Current 23 Front injector high

36 Current 32 Rear injector high

37 Current 16 Battery voltage low

38 Current 16 Battery voltage high

39 Current 43 VSS sensor low

40 Current 43 VSS sensor high

41 Current N/A (no speedo code for this) Check engine light open/low NO CHECK ENGINE LAMP AT KEY ON or CHECK ENGINE LAMP ON CONTINUOUSLY

42 Current N/A (no speedo code for this) Check engine light high NO CHECK ENGINE LAMP AT KEY ON

43 Current 35 Tachometer low

44 Current 35 Tachometer high

45 Current 25 Rear cylinder no combustion

46 Current 24 Front cylinder no combustion

47 Current 34 Loss of idle speed control IDLE AIR CONTROL

48 Current 35 Accelerometer fault

49 Current 34 Starter output high

50 Current 25 Ignition enable output high

51 Current 21 Left turn output fault

52 Current 22 Right turn output fault

53 Current 11 Battery voltage high

54 Current 31 Alarm output low

55 Current 32 Alarm output high

56 Current 41 Ignition switch open/low

57 Historic 63 ECM serial data low

58 Historic 63 ECM serial data open/high

59 Historic 63 TSSM serial data low

60 Historic 63 TSSM serial data open/high

61 Historic 61 Loss of TSM/TSSM serial data

62 Historic 14 Loss of all ECM serial data (state of health)

63 Historic 33 System relay contacts open

64 Historic 33 System relay coil high/shorted

65 Historic 33 System relay coil open/low

66 Historic 33 System relay contacts closed

67 Historic 99 Incorrect password

68 Historic 99 Missing password

69 Historic 41 CKP sensor intermittent

70 Historic 41 CKP sensor synch error

71 Historic 11 TP sensor open/low

72 Historic 11 TP sensor high

73 Historic 12 MAP sensor open/low

74 Historic 12 MAP sensor high

75 Historic 14 ET sensor voltage low

76 Historic 14 ET sensor open/high

77 Historic 15 IAT sensor voltage low

78 Historic 15 IAT sensor open/high

79 Historic 24 Front ignition coil open/low

80 Historic 25 Rear ignition coil open/low

81 Historic 24 Front ignition coil high/shorted

82 Historic 25 Rear ignition coil high/shorted

83 Historic 24 Front cylinder combustion intermittent

84 Historic 25 Rear cylinder combustion intermittent

85 Historic 23 Front injector open/low

86 Historic 32 Rear injector open/low

87 Historic 23 Front injector high

88 Historic 32 Rear injector high

89 Historic 16 Battery voltage low

90 Historic 16 Battery voltage high

91 Historic 43 VSS sensor low

92 Historic 43 VSS sensor high

93 Historic N/A Check engine light open/low NO CHECK ENGINE LAMP AT KEY ON or CHECK ENGINE LAMP ON CONTINUOUSLY

94 Historic N/A Check engine light high NO CHECK ENGINE LAMP AT KEY ON

95 Historic 35 Tachometer low

96 Historic 35 Tachometer high

97 Historic 25 Rear cylinder no combustion

98 Historic 24 Front cylinder no combustion

99 Historic 34 Loss of idle speed control

100 Historic 35 Accelerometer fault

101 Historic 34 Starter output high

102 Historic 25 Ignition enable output high

103 Historic 21 Left turn output fault

104 Historic 22 Right turn output fault.

105 Historic 11 Battery voltage high

106 Historic 31 Alarm output low

107 Historic 32 Alarm output high

108 Historic 41 Ignition switch open/low

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