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CANplus CP1000
Control Panel Operation Manual
*Patent Pending
46
9M02-1000-A401-EN Revision G
1.
Disconnect the battery and the panel
2.
Connect an ohmmeter across the green and yellow CAN pins (pins u & v) of the D21 connector.
3.
A reading of near 0 ohms indicates the other end of the bus is not correctly terminated or not intact.
4.
A reading of 120±10
Ω indicates
the other end of the bus is terminated correctly and that the
CP1000’s software configurable termination resistor should be turned on.
5.
A reading of 60±5
Ω indicates that the bus is already terminated
at both ends and that the
CP1000’s software configurable termination resistor should be turned off.
Note:
The CP1000 has switchable termination via software. Please see the CAN bus settings in the Tech or Admin
menus for more information.
11.5 Diagnostic Trouble Codes (DTC)
CAN Diagnostic Trouble Codes be a pair of numbers, the SPN (Suspect Parameter Number) and the FMI
(Failure Mode Indicator). The SPN indicates the faulting subsystem, and the FMI identifies the type of failure.
11.5.1 Typical SPNs
Standard SPN codes are defined by SAE J1939-71. Not all standard codes are provided by ECUs.
Manufacturers may add additional SPN codes beyond the codes identified in J1939-71. Refer to the ECU
documentation for supported SPNs.
Table 2: Example SPN
SPN
Description
51
Throttle Position
91
Accelerator Pedal Position
94
Fuel Delivery Pressure
98
Engine Oil Level
100
Engine Oil Pressure
110
Engine Coolant Temperature
111
Coolant Level
11.5.2 FMI
FMI codes are defined by SAE J1939-71. Refer to the ECU documentation for correct interpretation of the FMI
Table 3: FMI Descriptions
FMI
Description
0
Data valid but above normal operational range
1
Data valid but below normal operational range
2
Data erratic, intermittent or incorrect
3
Voltage above normal or shorted high