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How To Determine Trouble Codes Stored By The ECM For 2001 and Earlier EFI-Equipped FLTs * (for FLTHT, FLHTC, FLHTC-I, FLHTC Ultra-I, FLTR and FLTR-I models) * copied from the Harley Davidson 1998 FLT Service Manual |
How To Determine Trouble Codes Stored By The ECM For 2001 and Earlier EFI-Equipped FLTs * (for FLTHT, FLHTC, FLHTC-I, FLHTC Ultra-I, FLTR and FLTR-I models) * copied from the Harley Davidson 1998 FLT Service Manual |
Knowing which trouble codes are stored by your bike's ECM can greatly assist you in
determining the source of a problem you are having. In order to check the codes on
an EFI-equipped Electra Glide (FLHTC/U-I), Road Glide (FLTR-I) or Road King (FLHRC-I)
without the benefit of a scanalyzer, do the following:
- Set the handlebar kill switch to 'On'
- Turn the key switch to 'IGNITION' for 3 seconds
- Turn the key switch back to 'OFF' for another 3 seconds
- Again turn the key switch to 'IGNITION' for 3 seconds
- Again turn the key switch back to 'OFF for another 3 seconds
- Now turn the key switch back to 'IGNITION' and wait.
8 seconds after the last step, a sequence of flashing lights will begin (from the engine-check light). These let you read out the codes stored by the bike's ECM. Read the following to understand how to interpret the sequences:
First the light will flash an 'intermission' sequence. This is a series of rapid flashes (3 per second) to tell you it is about to transmit a trouble code.
The rapid flashing will then pause for 2 seconds. This tells you that it is about to parse out the first trouble code.
The engine-check light will now flash at a rate of 1 beat/second to give you the first digit in the first trouble code the ECM has stored (just count the beats to get the number). It will then pause for 2 seconds and flash out the second digit at 1 beat/second and pause again for 2 seconds to tell you it is finished transmitting that digit (there are always 2 digits for a complete trouble code). Record these 2 digits so you can translate them, using the table below.
It is possible that there is more than one trouble code stored by the ECM, so the rapid-flashing 'intermission' sequence will start again, followed once more by a 2 second pause to tell you it is going to parse out another code. Just keep reading the codes as described above until you get the same code fed back to you, because the whole cycle will keep repeating once the last code is flashed out.
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To interpret the code (or codes) you have read out, refer to the chart presented below:
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Trouble Code
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Description of Fault
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11
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Throttle Position Sensor
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12
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Barometric Pressure Sensor
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14
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Engine Temperature Sensor
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15
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Intake Air Temperature Sensor
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16
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Battery Positive Voltage
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23
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Front Injector
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24
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Front Ignition Coil
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25
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Rear Ignition Coil
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32
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Rear Injector
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33
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Fuel Pump Relay
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52
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ECM RAM Error *
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53
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ECM ROM Error *
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54
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EEPROM Error *
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55
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Microprocessor Malfunction *
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56
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Crank Position Sensor/Cam Position Sensor Signal Error **
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* - Requires ECM Replacement
** - Not applicable for 2001 Models
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Knowing which trouble codes are stored by your bike's ECM can greatly assist you in
determining the source of a problem you are having. In order to check the codes on
an EFI-equipped Electra Glide (FLHTC/U-I), Road Glide (FLTR-I) or Road King (FLHRC-I)
without the benefit of a scanalyzer, do the following:
- Set the handlebar kill switch to 'On'
- Turn the key switch to 'IGNITION' for 3 seconds
- Turn the key switch back to 'OFF' for another 3 seconds
- Again turn the key switch to 'IGNITION' for 3 seconds
- Again turn the key switch back to 'OFF for another 3 seconds
- Now turn the key switch back to 'IGNITION' and wait.
8 seconds after the last step, a sequence of flashing lights will begin (from the engine-check light). These let you read out the codes stored by the bike's ECM. Read the following to understand how to interpret the sequences:
First the light will flash an 'intermission' sequence. This is a series of rapid flashes (3 per second) to tell you it is about to transmit a trouble code.
The rapid flashing will then pause for 2 seconds. This tells you that it is about to parse out the first trouble code.
The engine-check light will now flash at a rate of 1 beat/second to give you the first digit in the first trouble code the ECM has stored (just count the beats to get the number). It will then pause for 2 seconds and flash out the second digit at 1 beat/second and pause again for 2 seconds to tell you it is finished transmitting that digit (there are always 2 digits for a complete trouble code). Record these 2 digits so you can translate them, using the table below.
It is possible that there is more than one trouble code stored by the ECM, so the rapid-flashing 'intermission' sequence will start again, followed once more by a 2 second pause to tell you it is going to parse out another code. Just keep reading the codes as described above until you get the same code fed back to you, because the whole cycle will keep repeating once the last code is flashed out.
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To interpret the code (or codes) you have read out, refer to the chart presented below:
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Trouble Code
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Description of Fault
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11
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Throttle Position Sensor
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12
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Barometric Pressure Sensor
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14
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Engine Temperature Sensor
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15
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Intake Air Temperature Sensor
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16
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Battery Positive Voltage
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23
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Front Injector
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24
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Front Ignition Coil
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25
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Rear Ignition Coil
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32
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Rear Injector
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33
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Fuel Pump Relay
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52
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ECM RAM Error *
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53
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ECM ROM Error *
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54
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EEPROM Error *
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55
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Microprocessor Malfunction *
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56
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Crank Position Sensor/Cam Position Sensor Signal Error **
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* - Requires ECM Replacement
** - Not applicable for 2001 Models
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