LESSON 2 OF 11

A Good Write-Up

YOU WILL BE ABLE TO

Execute a complete service write-up following the complaint, cause, and correction format.
Identify and record critical unit data including VIN, model, and component tag information.
Document diagnostic evidence through recorded test readings and photographic failure analysis.

TOOLS AT THE BAY

Digital Multimeter — Record precise test readings for voltage and amperage to document in the write-up.
Pressure Gauge — Measure and record pump or system pressures for diagnostic verification.
Digital Camera or Phone — Take photos of the failure and component tags before removing parts from the trailer.
Measuring Tape — Capture physical dimensions or measurements as part of the recorded test data.

How It Works

The Three Pillars of Documentation

Every valid service record is built on the Complaint, Cause, and Correction. The complaint must be recorded in the customer's own words. The cause must be supported by recorded test readings and measurements. The correction must detail the specific parts used and the labor time required to resolve the failure.

Component Data Integrity

Warranty and parts accuracy depend on recording specific tag data. This includes the KTI pump model, serial number, and date codes, alongside the last 6 digits of the trailer VIN. Recording this data immediately ensures the correct parts are sourced and the warranty claim reflects the specific unit in the shop.

Evidence Preservation

Visual and physical evidence must be maintained throughout the repair process. Taking photos of the failure and tags before part removal provides an indisputable record. Furthermore, all failed parts must be tagged and kept to satisfy warranty requirements and quality inspections.

Step-by-Step Procedure

0/6 done

1.Record VIN, model, and component tag data (e.g. KTI pump model, serial, date, last 6 of VIN).
2.Write the customer complaint in their words.
3.Record test readings: voltage, amperage, pressures, measurements.
4.State the cause and the correction, with parts and labor time.
5.Take photos of the failure and tags before removing parts.
6.Get written pre-approval before repairing; tag and keep failed parts.

Diagnostic Chart

Symptom	Check	Spec / Expected	Likely cause & fix
Incomplete unit identification for warranty claim.	Locate and record the KTI pump model, serial number, and date code.	Per the applicable manual	Critical component tag data was missed during the initial intake or write-up. Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019)
Lack of diagnostic proof for the stated cause.	Perform and record specific readings for voltage, amperage, and pressures.	Per the applicable manual	The technician stated a cause based on intuition rather than recorded test data. Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019)
Repair rejected by customer or warranty provider.	Review the file for written pre-approval and photographs of the failure.	Per the applicable manual	Repair was initiated before obtaining written pre-approval or documenting the failure visually. Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019)

At the Bay: Diagnose the Case

CASE 1 / 3

Incomplete unit identification for warranty claim.

Test
Compare
Correct

Select the next check

Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019). A likely cause is a hypothesis; confirm it with the applicable service procedure before repair.

Common Bay Mistakes

✕ Failing to record the last 6 digits of the VIN.
✕ Paraphrasing the customer complaint instead of using their own words.
✕ Removing failed parts before taking photos of the tags and the failure.
✕ Discarding failed parts before the warranty claim is finalized.
✕ Omitting labor time or parts lists from the correction statement.
✕ Proceeding with repairs based on verbal approval only.

Quick Check

Practice only — not scored.

What specific component data must be recorded for a KTI pump according to the lesson?

When should photos of the failure and component tags be taken?

What three elements must be included in a good write-up?

Plan the Service Sequence

A Good Write-Up

Planning practice only. Follow the applicable manufacturer's instructions, employer safety program and qualified supervision on real equipment.

Plan the first action. Compare the service steps with the bay mistakes.

Basis: KTI DC Power Unit Troubleshooting Guide (Jan 2019)

Source: KTI DC Power Unit Troubleshooting Guide (Jan 2019)

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