Yamaha 2013 FJR1300AS Service Manual page 710

ELECTRONICALLY ADJUSTABLE SUSPENSION SYSTEM
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MAINTENANCE OF THE SCU (suspension
control unit)
Checking the SCU (suspension control unit)
1. Check:
• Terminals "1" of the SCU
Cracks/damages → Replace the SCU.
• Terminals "2" of the SCU couplers
Connection defective, contaminated, come-
off → Replace or clean.
TIP
If the SCU couplers are clogged with mud or dirt,
clean with compressed air.
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SCU (suspension control unit) SELF-DIAGNOSTIC FUNCTION
The SCU (suspension control unit) is equipped with a self-diagnostic function in order to ensure that
the electronically adjustable suspension system is operating normally. If this function detects a malfunc-
tion in the electronically adjustable suspension system, it immediately operates the system under sub-
stitute characteristics and lights the electronically adjustable suspension system warning light to alert
the rider that a malfunction has occurred in the system. Once a malfunction has been detected, a fault
code is stored in the memory of the SCU (suspension control unit). After the engine has been stopped,
the fault code number appears on the multi-function meter right display. If there is more than one fault
code number, the numbers are displayed in numerical order starting with the lowest number. Once a
fault code has been displayed, it remains stored in the memory of the SCU (suspension control unit)
until it is deleted.
Checking the electronically adjustable suspension system warning light
The electronically adjustable suspension system warning light come on for 2.0 seconds after the main
switch has been turned to "ON". If the shift down indicator light, electronically adjustable suspension
system warning light does not come on under this condition, the lights (LED) may be defective.
SCU detects an abnormal signal from a sensor
If the SCU (suspension control unit) detects an abnormal signal from a sensor while the vehicle is being
driven, the SCU (suspension control unit) illuminates the electronically adjustable suspension system
warning light and provides the electronically adjustable suspension system with alternate operating in-
structions that are appropriate for the type of malfunction. When an abnormal signal is received from a
sensor, the SCU (suspension control unit) processes the specified values that are programmed for
each sensor in order to provide the electronically adjustable suspension system with alternate operat-
ing instructions that enable the system to continue operating or stop operating, depending on the con-
ditions.
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