Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Diagnostic Routine B




Diagnostic Routine B

Diagnostic Overview

Outer Edge, Shoulder Wear

Pinpoint Test

1. MEASURE THE TREAD DEPTH

1. Using a tread depth gauge or similar tool, measure the outside edge/shoulder tread depth.

Is the tread depth greater than 1.588 mm (0.0625 in)?