For 1990-2009 cars only
DTC Descriptor
DTC B101E: Replace Electronic Control UnitDTC B101E: ECU Software Performance, Calibration Data Not Programmed
DTC B101E: ECU Software Performance
DTC B101E: ECU Software Performance, Calibration Data Not Programmed.
Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit/System Description
The internal fault detection is handled inside the control module. No external circuits are involved.
Conditions for Running the DTC
The module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.
Conditions for Setting the DTC
The module has detected an internal malfunction.
Action Taken When the DTC Sets
The module refuses all additional inputs.
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present. |
| • | The history DTC clears after 50 fault-free ignition cycles. |
Diagnostic Aids
| • | This DTC may be stored as a history DTC without affecting the operation of the module. |
| • | If stored only as a history DTC and not retrieved as a current DTC, do not replace the module. |
| • | If this DTC is retrieved as a current DTC, reset or reprogram the module that set the DTC. |
| • | If this DTC is retrieved as both a current and history DTC, replace the module that the DTC set for. |
Circuit/System Verification
If the DTC is retrieved again as a current DTC, replace the module that set the DTC.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the repair.
Refer to Control Module References for the non-communicating module replacement, setup, and programming.
