DTC U2101
Diagnostic Instructions
DTC Descriptor
DTC U2101 00: Maximum List of Control Modules Not Programmed
DTC U2101 45: Maximum List of Control Modules Not Programmed Variant Not Programmed
Circuit/System Description
Some control modules must be programmed with software that specifically identifies the correct type and quantity of control 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 control module. No external circuit diagnosis is involved.
Conditions for Running the DTC
| • | Voltage supplied to the control module is in the normal operating voltage range. |
| • | The vehicle power mode requires serial data communication to occur. |
Conditions for Setting the DTC
| • | The control module 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 control module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction. |
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
Scan Tool References
Control Module References
Circuit/System Verification
- Verify the appropriate DTC is not set.
| ⇒ | 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. |
- With a scan tool, clear the DTCs.
- Vehicle OFF, remove the scan tool, open and close the drivers door.
- Wait 60 seconds, then verify the DTC is not set.
| ⇒ | If the DTC is set, replace the appropriate control module. |
Repair Instructions
Perform the Diagnostic Repair Verification
Control Module References
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