2022-2024 Jeep Wrangler ESCL Not Starting DTCs U1433-62

Symptoms

Owners of 2022-2024 Jeep Wrangler vehicles may experience a critical issue where the vehicle fails to start, and the steering wheel remains locked. This condition is typically linked to a malfunction of the Electric Steering Column Lock (ESCL) system. When the ESCL does not function correctly, it prevents the vehicle from starting and can leave the steering wheel immobilized, posing a significant inconvenience. The driver may also notice a warning light appear in the instrument cluster. This "Vehicle Does Not Start" and "Steering Wheel Locked" condition is the primary symptom addressed by STAR Online Publication S2408000110 for the 2022-2024 Jeep Wrangler ESCL not starting problem.

Fault Codes / DTCs

When a 2022-2024 Jeep Wrangler ESCL not starting issue occurs, a scan tool may reveal one or more of the following Diagnostic Trouble Codes (DTCs) stored or active within the ESCL module:

Code	Description
U1433-62	Implausible Ignition Switch Status Message Received-Signal Compare Failure
U1412-62	Implausible Vehicle Speed Signal Received - Signal Compare Failure
U1517-62	Body Controller Secret Code-Signal Compare Failure

These codes indicate specific communication or signal comparison failures within the ESCL system, contributing to the "Vehicle Does Not Start" symptom.

Diagnosis

Diagnosing the 2022-2024 Jeep Wrangler ESCL not starting condition involves several key checks. Technicians should first confirm if any warning lights are present in the instrument cluster. It is crucial to verify that the battery voltage is within the specified range of 10 to 16 volts, as incorrect voltage can lead to ESCL malfunctions. Additionally, an inspection for any aftermarket accessories that may have been incorrectly installed is recommended, as these can sometimes interfere with vehicle electronics.

Further diagnostic steps include inspecting and replacing any open fuses. A scan tool should be used to read DTCs from various modules, including the Powertrain Control Module (PCM), Body Control Module (BCM), Anti-lock Brake System (ABS), and Radio Frequency Hub Module (RFHM). Any communication or security-related DTCs in these modules must be repaired and cleared prior to performing ESCL Module diagnostic procedures. This comprehensive approach ensures that the root cause of the issue is correctly identified.

Repair Procedure Summary

STAR Online Publication S2408000110 outlines a detailed repair procedure, emphasizing that the Electric Steering Column Lock (ESCL) module should not be replaced until specific conditions are confirmed. After ensuring proper system voltage (10-16 volts), checking for aftermarket accessories, and replacing any open fuses, technicians must use a scan tool to read and clear all communication and security DTCs from the PCM, BCM, ABS, and RFHM modules.

If the scan tool cannot communicate with the ESL Module, technicians should check the harness connections using wiring diagrams as a guide. This involves inspecting the wiring, harness connector, and terminals for physical damage or corrosion, and ensuring ground circuits are clean and tight. All necessary cleaning or repairs must be completed.

Once communication is established, all ESL Module DTCs should be read and recorded, along with the ESL Module software version and variant ID. If the ESL Module was recently replaced, it must be properly programmed. Technicians are also advised to check for any applicable Service Information Tune-ups or Technical Service Bulletins (TSBs) that may apply to modules such as the PCM, BCM, ABS, and RFHM. Only if, after all these steps, the ESCL DTCs remain present and cannot be cleared, should the ESCL module be replaced.

Important Warnings

This manufacturer communication, STAR Online Publication S2408000110, provides critical instructions for technicians. It states: "Clear the faults and do not replace the ESCL unless you confirm the following:" followed by the detailed diagnostic and repair steps. This means technicians should not immediately replace the ESCL module without first performing a thorough diagnosis and attempting to resolve other related issues that could cause the 2022-2024 Jeep Wrangler ESCL not starting problem.

The document also clarifies that it "does not authorize warranty repairs" and "does not provide any conclusions about what is wrong with the vehicle." It serves as a record of past experiences, and the technician is responsible for deciding the appropriate course of action. If no solution is found, technicians are advised to "Contact STAR Center, or your Technical Assistance Center Via TechCONNECT or eCONTACT ticket."

Owner Action

If your 2022-2024 Jeep Wrangler is experiencing a "Vehicle Does Not Start" condition with a locked steering wheel, especially if accompanied by warning lights or the symptoms described, it is recommended to take your vehicle to an authorized dealership. Inform them about the issue and mention STAR Online Publication S2408000110. The dealership technicians have access to the specific diagnostic and repair procedures outlined in this communication to address the Electric Steering Column Lock (ESCL) malfunction.

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Source: NHTSA ID: 11008337, STAR Online Publication S2408000110