DTC U2101
DTC U2101 |
Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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DTC Descriptor |
DTC U2101
CAN Bus Maximum Configuration List
Circuit/System Description |
Some control modules must be programmed with software that specifically identifies the correct type and quantity of modules on the serial data bus based on RPO configuration. If a control module was not properly configured after installation, the appropriate U Code may be set for that module. No external circuit diagnosis is involved.
Conditions for Running the DTC |
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Voltage supplied to the module is in the normal operating voltage range.
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The vehicle power mode requires serial data communication to occur.
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Conditions for Setting the DTC |
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The control module is not configured properly.
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Control unit recognises a programming error.
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CAN-Bus configuration is invalid
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Conditions for Clearing the DTC |
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A current DTC clears when the malfunction is no longer present.
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A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
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Reference Information |
Schematic Reference
Data Communication Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Data Link Communications Description and Operation
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool References
Control Module References for scan tool information
Circuit/System Verification |
1. |
Verify the appropriate DTC is not set.
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2. |
If the DTC is set along with other codes, diagnose all other codes first. If no other codes are set, program the control module specified by the DTC descriptor.
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3. |
With a scan tool, clear the DTCs.
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4. |
Ignition OFF, remove the scan tool, open and close the drivers door.
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5. |
Wait 60 seconds, then verify the DTC is not set.
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6. |
If the DTC is set, replace the appropriate control module.
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Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup, and programming