Shimano SM-EC79 Service Instructions Manual page 10

For the battery bracket
Battery bracket
For the front derailleur or rear derailleur
Rear derailleur
connector
NOTE:
• If the green indicator turns on while checking the cable using the checker to indicate
that the cable is normal, you should still shake and twist the cable while the indicator
is still turned on to check that there are no open circuits. If even a momentary
indication of a problem appears, replace the cable.
• The power will turn off automatically after 10 seconds. If you press the ENTER switch,
the operation will be repeated for another 10 seconds.
• If two batteries (main checker unit and battery bracket) are fitted while checking is
in progress, the orange and red indicators on the main checker unit will flash
simultaneously, so if this happens, remove the battery from the battery bracket.
Front derailleur
connector
Problem
Electric cable checker
Turned off
11
Using the checker
No problem
The green indicator will
turn on for 10 seconds
No problem
The green indicator will
turn on for 30 seconds
Checker unit
Green indicator turns
off and red indicator
turns on