jcb JS 200 Series, Service Manual

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10 - 2
Channel 3 electrical system abnormalities
Channel 3 will monitor and store information on the
following functions:
Computer reset (engine stop due to electrical interference)
If the computer signal is subject to electrical interference it
will shut down the engine as it tries to reset the controller
and throttle motor, this function will record any instances of
this happening confirming that this was the cause of the
problem.
Throttle motor limit switches
The throttle motor relies on information gained from the limit
switches. This function will record any instances of the lower
limit switch either not operating or operating twice, either of
these would cause a throttle system failure. The previous
system would only display `ELECTRICAL PROBLEM´. This
system will record the number of times that an abnormality
occurs with the throttle motor limit switches again
confirming that this was the cause of the problem.
Electrical system abnormalities
This function will record any electrical faults occurring on the
main solenoids and relays, showing that a fault had occurred
with a particular solenoid or relay, even if no fault was
evident when fault finding.
Intermittent electrical contact
This function will indicate any electrical services which
experience intermittent electrical contact.
Air filter clogged
This will record the engine hours at which any air filter
clogged messages were received by the controller.
Channel 4 machine performance data
Channel 4 will monitor and store information on the
following machine performance:
Hour meter
The controller will store a back up reading of engine hours in
case of failure or unauthorised tampering with the hour
meter in the cab.
Machine actual working hours
The controller will store the actual hours a machine has been
working as opposed to hours the engine has been running,
this can give a clearer indication of actual component life.
Machine working modes
The controller will store the amount of hours the machine
has been working in each of the four working modes.
Travel/Swing / excavating / hammering operations
The controller will store the amount of hours that a machine
has been performing each of these functions.
Engine coolant / hydraulic oil temperature
The controller will record how many hours a machine has
been operating at a specific coolant or hydraulic oil
temperature, it will also record the maximum temperature
reached by the engine coolant and hydraulic oil.
Engine RPM
The controller will record how many hours the engine has
been operating at specific engine rpm’s.
Key Switch ON / OFF;
The controller records how many times the key switch has
been turned on.
One touch idle/ auto idle
The controller records the frequency of use of these
functions.
Section C Electrics
9803/6400
Section C
10 - 2
Issue 1
CAPs II Diagnostic system
Turn On The Ignition
Press change
button
Press change
button
Press change
button
Press change
button
Machine
normal
indication
Machine
condition
Machine
function
reset
CH:3
Intermittent
electrical faults
data logging
CH:4
Machine
performance
data logging
Pressing the select
button will move
through the
functions
Pressing the select
button will move
through the
functions
Pressing the select
button will go to
any stored faults
Pressing the select
button will move
through the
stored information