Johnson EP703, Service Manual

Page: 21 / 28

18
HR grip wiring
Console cable
set
CHAPTER 5
：
TROUBLESHOOTING
5.6 Heart Rate Function Issues
Symptom:
Heart Rate Function Does Not Work or is Reading Incorrectly
Solution:
1. With a multi-meter set for DC voltage, place one terminal on each of the HR grip plates. The HR
grip should give a voltage reading of between 0.5 and 2.0VDC. If the voltage is not between 0.5 and
2.0VDC, remove the 3 screws holding the HR grip together and check the connection of the HR grip
wiring.
2. Check continuity of the HR grip wiring.
Place one terminal of a multi-meter set for resistance on the HR grip wiring at the HR grip, and
the other terminal on the HR grip wiring at the console. An ohm reading of around 1 should be
expected. If the reading is higher than 1, replace the HR grip wiring.
3. If the connection, HR grips, and HR grip wiring do not solve the issue, replace the UCB.