CAN Channel Resistive Loading Verification Troubleshooting Section
©Vertical Express 4-10 Printed in USA April 2020
Group CAN Channel Termination
(continued)
Figure 3 - Controller Group CAN Cross-Connects
CAN Channel Troubleshooting Guide
Car CAN Link (CCH/CCL)
CCH to CCL
Indication Problem Verification
Resistance reads ~60 ohms. N/A N/A
Resistance does not read ~60
ohms.
Termination jumpers and resistors
are set incorrectly.
Verify the correct jumper and resistor
settings on CPUA and all termination
points on the CC link.
Resistance is not a divisor of
120 ohms.
Wires crossed, wrong value for
termination resistors, or shorts to
other circuits.
Verify and correct.
CCH/CCL to
SHCC
Indication Problem Verification
Resistance reads Open Circuit. N/A N/A
Resistance = measurement
between CCH and CCL.
A short between SHCC and CCH(L). Verify and correct.
Resistance is not the value
measured between CCH and CCL.
Shorts to other circuits. Verify and correct.
Hall CAN Link (HC1H/HC1L), only required when there is a node present on CH3
HC1H to
HC1L
Indication Problem Verification
Resistance reads ~60 ohms. N/A N/A
Resistance does not read ~60
ohms.
Termination jumpers and resistors
are set incorrectly.
Verify the correct jumper and resistor
settings on CPUA and all termination
points on the HC1 Link.
Resistance is not a divisor of 120
ohms.
Wires crossed, wrong value for
termination resistors, or shorts to
other circuits.
Verify and correct.
HC1H or
HC1L
to SHHC1
Indication Problem Verification
Resistance reads Open Circuit. N/A N/A
Resistance = measurement
between HC1H and HC1L.
A short between SHHC1 and HC1H
or HC1L.
Verify and correct.
Resistance is not the value mea-
sured between HC1H and HC1L.
Shorts to other circuits. Verify and correct.
Group CAN bus RCH/RCL Cross Connects
IOF
Jumpers RCC &
RCT REMOVED
CPUC
CON40CON40
CON40
CON40
Jumpers RCC &
RCT REMOVED
Jumpers RCC &
RCT INSTALLED
Jumpers RCC &
RCT INSTALLED
IOFIOF IOF
CPUCCPUCCPUC
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