C1E2E00 - C1E2E00 Request Control ACCAebaxTar Invalid

C1E2E00 Request Control ACCAebaxTar Invalid - Fault Diagnosis Technical Description

Deep Fault Definition

C1E2E00 (Request Control ACCAebaxTar Invalid) is a diagnostic fault code internal to the intelligent power brake system, representing that a request from the control system to a specific actuator or module failed to receive an effective response. In the architecture of this system, "ACCAebaxTar" typically involves target control logic for Automatic Emergency Braking (AEB) and Adaptive Cruise, and its normal function relies on the integrity of data interaction between electronic control units. This fault indicates that when the controller issues a control command, the receiver (such as radar or actuator) returns an invalid signal, times out without response, or has abnormal physical connection status, resulting in the system unable to confirm that the target control request is effective. As part of the whole vehicle power brake safety architecture, activation of this diagnostic code means the control loop has broken and requires verification of hardware components or logic computation units.

Common Fault Symptoms

Based on system feedback and driving performance observed when the fault occurs, specific phenomena observable by the owner include but are not limited to:

• Dashboard Display Warning: A fault indicator light or text warning message related to the braking system appears on the vehicle information display screen or instrument cluster, indicating that some functions are restricted.
• Intelligent Power Brake Performance Degradation: The vehicle's active braking assistance, automatic emergency intervention, and other intelligent features are disabled or partially downgraded, resulting in an inability to provide expected safety redundancy protection under specific operating conditions.
• System Self-Check Passes But Function Missing: Although other power components of the vehicle (such as the engine) operate normally, the intelligent control module of the braking system shows an unready state, affecting the normal use experience of driving assistance functions.

Core Failure Cause Analysis

Based on the original data parsing of fault code C1E2E00, potential technical factors in three dimensions can be summarized:

• Hardware Components (Sensors and Actuators):

  • Front Millimeter Wave Radar Fault: As a key sensor for detecting target distance, speed, and direction, internal transmit/receive module anomalies or damaged antenna units will directly prevent the generation of valid target data, leading the controller to determine the control request is invalid.
  • Physical Connection Integrity: Although specific terminal states are not explicitly listed, poor physical contact between hardware components typically falls within this category.

• Wiring/Connectors (Physical Connections):

  • Pertains to the physical connection status of the communication bus or power lines between the front millimeter wave radar and the intelligent power brake controller, including whether the signal transmission path is subjected to electromagnetic interference, line short circuits or open circuits causing data handshake failure.

• Controller (Logic Computation and Processing Unit):

  • Intelligent Power Brake Controller Fault: As the core of control logic, if this electronic control unit has anomalies in its internal processing modules, it will be unable to correctly parse received radar data or perform effective validation on request signals, thereby determining the current state as invalid.

Technical Monitoring and Trigger Logic

The control system monitors the status of the above components through specific algorithmic logic. The following technical and operating conditions must be met to trigger C1E2E00 fault:

• Monitoring Targets: The system continuously monitors feedback signals for the validity of "ACCAebaxTar" control requests, including signal voltage status, data frame integrity, and communication latency thresholds.
• Specific Trigger Conditions: This fault code is activated and recorded only when the ignition switch is in the ON position (start switch set to ON) and the vehicle enters the diagnostic mode. During the system self-check phase, if the expected confirmation signals or response signals are not received or exceed normal logic ranges, the controller will determine that the request control is invalid.
• Numerical Judgment Logic: Although specific voltage thresholds are not provided by current data sources, in actual monitoring, the control system compares communication bus voltage with reference standard values (typically a stable level under a $12V$ system) to judge whether the signal is valid.

Note: This document analyzes based on original fault code data, aiming to provide principles for technical support, not involving specific replacement steps or component suggestions in the repair manual.