Toyota SD Service Manual page 21

Step Item
Needle
1. Needle and
sideways
needle plate
movement
2. Upper Upper
thread thread
tension dial tension
Diagnosing Method
<Condition>
<SD>
Pattern selection dial: "11"
<2D>
Pattern selection dial: "7"
<3D>
Pattern selection dial: "3"
Stitch width lever: "5"
<Diagnosis>
When the needle travels from left to right,
measure the distance (A) from the surface
of needle plate to the needle point.
<Condition>
Upper thread tension dial: "5"
Thread: Cotton yarn # 60
<Diagnosis>
Pass the upper thread from the spool of
thread to the thread guide, pull the thread
vertically and measure the tension (A)
when the value has stabilized.
(Using a measuring instrument)
19
Troubleshooting
Reference
Standard
Page
<SD, 2D>
A = 5 to 7 mm
[Adjustment]
page.32
<3D>
A = 3 to 5 mm
A = 0.85 to 1.15 [Adjustment]
N page.33