No Hand Held Reading - No Chest Strap Reading - Precor AMT Series Service Manual

10 If the wiring is correct, for the following measurements. With an
ohmmeter measure between the lower right contact pin on the J1
connector and the lower right hand held heart rate contact on the
handlebar. The reading should be 1 Ω (ohms) or less. Measure between
the upper right contact pin on the J1 connector and the upper right
hand held heart rate contact on the handlebar. The reading should be
1 Ω (ohms) or less. Measure between the upper left contact pin on the
J1 connector and the upper left hand held heart rate contact on the
handlebar. The reading should be 1 Ω (ohms) or less. Measure between
the lower left contact pin on the J1 connector and the lower left
hand held heart rate contact on the handlebar. The reading should be
1 Ω (ohms) or less. If any of the above readings are greater than 1
Ω (ohms), replace the heart rate PCA to handlebar wire harness.

No hand held reading - No chest strap reading

11 Access the diagnostic program, per procedures
Diagnostic Software
the Diagnostic Software. Advance to the heart rate display portion
of the diagnostic program. Verify that neither a chest strap signal
or a hand held signal is being accepted with either a heart rate
test transmitter or a chest strap transmitter.
12 Check the plug/connector connections on both the heart rate PCA
(J4), and upper PCA (J1).
13 If neither a chest strap signal or a hand held signal is being
accepted, measure between the ground and 5 Vdc pins on J4 for 5 Vdc.
If 5 Vdc is present, replace the heart rate PCA.
14 If 5 Vdc is not present, remove the connector from J4 of the heart
rate PCA. Measure between the ground and 5 Vdc pins of the connector
(just removed from the heart rate PCA) for 5 Vdc. If 5 Vdc is
present, replace the heart rate PCA. If the 5 Vdc is not present,
measure between the corresponding pins of J1 on the upper PCA (red
and black wires). If 5 Vdc is not present replace the upper PCA. If
5 Vdc is present, replace the upper PCA to heart rate PCA cable.
15 Constant or intermittent readings when neither the hand held or
chest strap is in use.
16 Verify that a ferrite core is clamped around the heart rate PCA to
upper PCA cable. Constant or intermittent heart rate readings when
neither heart rate system is in use is caused by something in the
near vicinity radiating RF energy that is being received by the
chest strap portion of the heart rate PCA. Replace the heart rate
PCA with a 300812-101 (or higher) heart rate PCA. 300812-101 and
higher versions of heart rate PCA are less susceptible to radiated
RF energy.
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P80 Settings
(on page 13),
Accessing the P30
(on page 51), or Accessing
Page 47