Precor C954 Serivce Manual page 36

14. If the resistance readings in step 13 are normal, replace the lower PCA per Procedure 6.3.
15. If you have performed all of the procedures above and have been unable to correct the
problem, call Precor customer service.
16. Set the treadmills circuit breaker in the "off" position and remove the AC line cord from the
AC outlet. Remove the lift motor connector from the J7 connector on the lower PCA. Visually
inspect the lift motor connector for broken or improperly crimped connections. Using an
ohmmeter, measure between terminals 1 & 3, 1 & 2 and 2 & 3 of the lift motor connector.
Terminals 1 and 3 should read approximately 1 KΩ. The sum of the two readings between
terminals 2 & 3 and 1 & 2 should total approximately 1 KΩ. If either reading is open or very
high resistance, replace the lift motor per Procedure 6.1.
17. If the resistance measurements in step 16 are normal, the problem may be either the lower
PCA or the upper PCA. Replace the lower PCA. If the problem persists, reinstall the original
lower PCA and replace the upper PCA.
18. If you have performed all of the procedures above and have been unable to correct the
problem, call Precor customer service.
Page 1-36
C954, C956 Treadmill
Page 36