Chevrolet Trax: DTC U18B9-U18BF: High speed can bus subnet configuration list
Diagnostic Instructions
- Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
- Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptor
DTC U18B9
Primary High Speed CAN Bus Subnet Configuration List
DTC U18BF
Secondary High Speed CAN Bus Subnet Configuration List
For symptom byte information, refer to Symptom Byte List .
Circuit/System Description
Devices on the high speed GMLAN serial data bus and the chassis high speed
GMLAN serial data bus must be
programmed with software that specifically identifies the correct type and
quantity of devices on the bus based
on RPO configuration. If a device was not properly configured after
installation, the appropriate U Code may be
set for that device. No external circuit diagnosis is involved.
Conditions for Running the DTC
- Voltage supplied to the device is in the normal operating voltage range.
- The vehicle power mode requires serial data communication to occur.
Conditions for Setting the DTC
- The device is not configured properly.
- Control unit recognises a programming error.
- CAN-Bus configuration is invalid
Conditions for Clearing the DTC
- A current DTC clears when the malfunction is no longer present.
- A history DTC clears when the device ignition cycle counter reaches the
reset threshold, without a repeat
of the malfunction.
Reference Information
Schematic Reference
- Data Communication Schematics (Encore), Data Communication Schematics (Trax)
- Control Module References
Connector End View Reference
WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT CONNECTOR END VIEWS -
INDEX - ENCORE WIRING SYSTEMS AND POWER MANAGEMENT - COMPONENT
CONNECTOR END VIEWS - INDEX - TRAX
Description and Operation
Data Link Communications Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Ignition ON.
- Verify DTC U18B9-U18BF is not set.
- If DTC U18B9-U18BF is set along with other DTCs set
Diagnose all other DTCs first. Refer to Diagnostic Trouble Code (DTC) List -
Vehicle .
- If DTC U18B9-U18BF is set without other DTCs set
- Program the device that set the DTC.
- Ignition OFF, remove the scan tool, open and close the driver door. Wait
60 s.
- Verify the DTC does not set.
- If the DTC sets, replace the appropriate device.
- If the DTC does not set
- All OK.
If DTC U18B9-U18BF is not set
- All OK
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Control Module References for device replacement, programming and setup
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
NOTE: The following steps must be completed before using the
symptom tables.
Perform the Diagnostic System Check - Vehicle before using the symptom
tables in order to verify that
all of the foll
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
NOTE:
Do not use a chemical flush.
Store used coolant in the proper manner, such as in a used engine
coolant
holding tank.
Do not pour used coolant down a drain. Ethylene glycol antifreeze is
a
very toxic chemical.
Do not dispose of coolant into the sewer system or ground water. This
is
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diagnostic Procedure Instructions provides an overview of each
diagnostic category.
DTC Descriptor
DT