Pre & Post Repair Scanning
in Diamond Bar

Pre and post scans for shops and owners

Pre and post repair scanning in Diamond Bar documents DTCs and system health before and after work. Mobile for drivers, dealerships, fleets, glass shops, and body shops, with Pomona and the Inland Empire covered.

Request Service Call (213) 609-2606

Full System Documentation OEM Scan Tools All Makes & Models Mobile Service

What Is Pre & Post Repair Scanning?

Pre & post repair scanning is the process of connecting a professional scan tool to a vehicle’s OBD port before and after collision repairs to retrieve all diagnostic trouble codes (DTCs) stored across every module in the vehicle’s network. A pre-repair scan documents the vehicle’s condition at intake, capturing existing faults, ADAS status, and hidden damage not visible in a standard visual estimate.

A post-repair scan is performed after all repairs are completed to verify that no new fault codes were introduced during the repair process, that all ADAS and safety systems are functioning correctly, and that the vehicle meets OEM specifications before delivery. Many OEM position statements and insurance guidelines now require both scans as part of a proper repair procedure.

We perform all scans on-site at your facility using professional multi-system scan tools. Reports are detailed and timestamped for your repair records.

Scanning Capabilities

All-System DTC Retrieval

Every module scanned, engine, body, chassis, safety, ADAS, and more

Documented Scan Reports

Timestamped, documented reports for supplement and liability purposes

ADAS Status Verification

Confirms calibration requirements and ADAS system readiness after repair

OEM-Level Scan Tools

Professional tools with full system access across domestic and import platforms

What We Cover

We provide complete pre-repair and post-repair scanning services for collision centers, repair shops, and dealerships across Diamond Bar, Pomona, and the Inland Empire.

Pre-Repair DTC Scan

Full all-system scan performed at vehicle intake before any work begins. Captures all stored, pending, and permanent DTCs across every module on the network.

Hidden Damage & Supplement Support

Pre-scan identifies fault codes triggered by collision-related damage not visible in a standard visual estimate, documenting evidence that supports supplement requests to insurance carriers.

Post-Repair Verification Scan

Full system scan performed after all repairs are complete. Verifies no new DTCs were introduced during the repair process and confirms vehicle readiness for delivery.

ADAS Scan & Calibration Prep

Dedicated scan of ADAS-related modules, forward camera, radar sensors, blind spot systems, and driver assist modules, identifying calibration requirements and system faults after repair.

Airbag & SRS Scan

Comprehensive SRS module scan including airbag control module, occupant classification module, seat belt pretensioners, and clock spring, documenting all crash data and active faults.

Network Check & Repair Reports

Verifies modules are communicating on the CAN bus network and delivers timestamped pre and post scan reports for your repair file and records.

When Is Pre & Post Repair Scanning Needed?

Pre and post repair scanning is required as part of a complete, OEM-compliant collision repair. Most OEM position statements and many insurance carriers now require both scans for every repair.

Before Any Collision Repair

A pre-repair scan should be performed at vehicle intake before any disassembly or repair work begins, documenting the vehicle’s exact electronic condition at the time it arrives.

After Collision Repair

A post-repair scan must be completed after all repairs are finished to verify no new faults were introduced and all systems are functioning correctly before the vehicle is returned to the customer.

Repair Documentation

Pre-scan reports record pre-existing faults and collision-induced damage before repairs begin, so the repair file shows what was found.

ADAS System Verification

After any repair that may affect ADAS components, a post-scan confirms which systems require calibration and verifies calibration was successful before vehicle delivery.

Before Vehicle Delivery

A final post-repair scan before delivery confirms the vehicle is free of active fault codes, all warning lights have been addressed, and the repair meets OEM standards.

Pre-Scan vs Post-Scan: What Gets Documented?

Select a topic to see what pre and post repair scanning documents for collision repairs and OEM-compliant delivery.

Pre-Scan Baseline

A pre-repair scan is a full all-system diagnostic scan performed at vehicle intake before any disassembly or repair work begins. It retrieves all stored, pending, and permanent diagnostic trouble codes (DTCs) from every module in the vehicle’s network, including engine, transmission, ABS, airbags, ADAS, body, and more. The resulting report documents the vehicle’s exact electronic condition at the time it arrives, establishing a baseline that protects the repair shop from liability and supports insurance supplement requests for hidden damage.

Vehicle Makes We Service

Pre & post repair scanning support for domestic, European, and Asian vehicle manufacturers.

Scanning Process

Every pre and post repair scan follows a structured process to document the vehicle’s electronic condition before work begins and verify the repair before delivery.

Arrive On-Site

Mobile technician arrives at your collision center or repair facility with professional multi-system scan tools.

Pre-Repair All-System Scan

Full all-system scan at intake retrieves stored, pending, and permanent DTCs across every module on the network.

Document Findings

Timestamped report captures existing faults, ADAS status, and hidden damage for estimate and supplement support.

Post-Repair Verification Scan

After repairs are complete, a full system scan verifies no new DTCs were introduced and systems function correctly.

Flag ADAS Calibration Needs

Post-scan identifies ADAS systems requiring calibration so nothing is missed before vehicle delivery.

Deliver Before/After Reports

Documented pre and post scan reports provide a clear before-and-after electronic repair record.

Frequently Asked Questions About Pre & Post Repair Scanning

Common questions about pre-repair and post-repair scanning for collision centers and repair shops.

What is a pre-repair scan?

A pre-repair scan is a full all-system diagnostic scan performed at vehicle intake before any disassembly or repair work begins. It connects to the vehicle’s OBD port and retrieves all stored, pending, and permanent diagnostic trouble codes (DTCs) from every module in the vehicle’s network, including engine, transmission, ABS, airbags, ADAS, body, and more. The resulting report documents the vehicle’s exact electronic condition at the time it arrives, establishing a baseline that protects the repair shop from liability and supports insurance supplement requests for hidden damage.

What is a post-repair scan?

A post-repair scan is a full all-system diagnostic scan performed after all collision repairs are complete and before the vehicle is returned to the customer. It verifies that no new fault codes were introduced during the repair process, that all repaired systems are functioning correctly, that ADAS modules requiring calibration have been addressed, and that the vehicle meets OEM standards for delivery. The post-scan report, combined with the pre-scan report, provides a complete electronic repair record.

Why are pre and post repair scans required?

Most major OEM manufacturers have published position statements requiring pre and post repair scans as part of a complete, proper collision repair. Modern vehicles have dozens of interconnected control modules, a collision can trigger fault codes in systems far removed from the visible damage area. Without a pre-scan, hidden electronic damage goes undocumented. Without a post-scan, new faults introduced during repair may go undetected. Many insurance carriers now require both scans for claim documentation, and shops that skip scanning expose themselves to liability if ADAS or safety systems malfunction after delivery.

Can a pre-scan find hidden damage not visible in the estimate?

Yes, this is one of the most important functions of a pre-repair scan. Collision forces can trigger fault codes in modules well beyond the visible damage area. A front-end impact can affect airbag sensors, ADAS modules, steering angle sensors, and stability control systems that show no visible damage. A rear impact can trigger crash data in the airbag control module. A pre-scan documents all of these electronically-triggered faults, providing evidence for supplement requests that covers damage the initial visual estimate missed.

Do insurance companies require pre and post repair scans?

Many insurance carriers now include pre and post repair scanning as a line item on estimates or require scan documentation as part of the claim process. Even where not explicitly required, scan reports provide critical liability protection for repair shops. If a vehicle is returned to a customer with undetected fault codes, particularly in ADAS or safety systems, the shop can face liability claims if those systems later malfunction. A documented pre and post scan record is the shop’s protection against those claims.

How long does a pre or post repair scan take?

Most pre and post repair scans are completed in 30 to 60 minutes depending on the vehicle make, model, and the number of systems being scanned. We perform all scans on-site at your facility, so there is no transport time or shop scheduling required. We offer fast scheduling throughout Southern California.

Pre & post repair scanning is often performed alongside these complementary services.

Diagnostic Scanning

Full-system scan & fault code retrieval

ADAS Calibration

Camera, radar & sensor calibration

Module Programming

Replacement module coding & configuration

OEM Programming

Manufacturer-specific programming platforms

Electrical Wiring & Harness

Sensor wiring diagnostics & repair

SRS / Airbag Systems