Silvercrest SKAS 1000 A16 Specifications Page 59

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Section 2
Fault Code Diagnostics
50
173 AD The main TCU has not received
communication from the engine. Error
on brake switch message: CCVS
The TCU received the SAE J1939 message from the ECM
but the information within the message was not within
specifications. Troubleshoot the brake switch. It is being
reported as permanently depressed.
If necessary, contact OnTrac at 866-668-7221 and request
a ZF-FreedomLine transmission specialist.
175 AF Error on “Ignition lock” signal
(terminal 15)
Verify voltage at pin 6/7 of the doubler.
Key on voltage should be 24 volts nominal. If < 18 volts,
replace the transmission voltage doubler.
Contact OnTrac at 866-668-7221 and request a
ZF-FreedomLine transmission specialist.
177 B1 The main TCU has not received
communication from the engine. Error:
system CAN busoff
Due to an issue with the vehicle’s SAE J1939 data link,
the TCU did not receive an expected SAE J1939
message. Follow your OEM’s SAE J1939 diagnostic
procedures to correct the issue.
178 B2 The main TCU has identified CAN error
frames not severe enough to cause a
busoff situation
Due to an issue with the vehicle’s SAE J1939 data link,
the TCU did not receive an expected SAE J1939
message. Follow your OEM’s SAE J1939 diagnostic
procedures to correct the issue.
179 B3 The SAE J1939 bus is not functioning
correctly
NOTE: The backbone of the SAE J1939
bus is terminated at each end with a
120 ohm resistor. Each component
communicating over the bus must
connect into the backbone.
Due to an issue with the vehicle’s SAE J1939 data link,
the TCU did not receive an expected SAE J1939
message. Follow your OEM’s SAE J1939 diagnostic
procedures to correct the issue.
NOTE: The resistance across pins C and D of the 9 pin
diagnostic connector will be about 60 ohms if both
terminating resistors are in place (120 ohms if only one
is installed).
180 B4 The main TCU has not received
communication from the engine
(CAN EEC1 timeout)
Due to an issue with the vehicle’s SAE J1939 data link,
the TCU did not receive an expected SAE J1939
message. Follow your OEM’s SAE J1939 diagnostic
procedures to correct the issue.
181 B5 The main TCU has not received
communication from the engine
(CAN EEC2 timeout)
Due to an issue with the vehicle’s SAE J1939 data link,
the TCU did not receive an expected SAE J1939
message. Follow your OEM’s SAE J1939 diagnostic
procedures to correct the issue.
182 B6 The main TCU has not received
communication from the engine
(CAN CCVS timeout)
Due to an issue with the vehicle’s SAE J1939 data link,
the TCU did not receive an expected SAE J1939
message. Follow your OEM’s SAE J1939 diagnostic
procedures to correct the issue.
183 B7 The main TCU has not received
communication from the engine
(CAN ERC1_ER timeout)
Due to an issue with the vehicle’s SAE J1939 data link,
the TCU did not receive an expected SAE J1939
message. Follow your OEM’s SAE J1939 diagnostic
procedures to correct the issue.
188 BC ECU fault — wrong interrupt If issue occurs during transmission software upgrade,
the TCU is incompatible with the level of software.
Replace the upper part of the transmission TCU.
Contact OnTrac at 866-668-7221 and request a
ZF-FreedomLine transmission specialist.
189 BD ECU fault — stack watch Replace the upper part of the transmission TCU.
Contact OnTrac at 866-668-7221 and request a
ZF-FreedomLine transmission specialist.
ISO Fault Code Diagnostics
NOTE: ISO display codes may not be available on vehicles built prior to January 2006.
ISO Fault
Identifier
ISO Display
Fault Codes
(J587 Display) Fault Description
Repair Instructions
NOTE: The following repair instructions pertain to
active faults only. For information and instructions
about inactive faults, please contact OnTrac at
866-668-7221 and request a transmission
specialist.
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