Power Steering Transistor i‚e‚a|‚V Seriesj
The power steering drive transistors are two IGBT modules which form an H bridge.
Symbol
Type
Applicable model
‚s‚l‚o‚r‚P
‚s‚l‚o‚r‚Q
‚Q‚l‚a‚h@‚P‚O‚O‚m|‚U‚O
FB10 - 30
Check Procedure
i‚PjVisually check the transistors for scores, scratches, damage, or excessive discoloration.
i‚QjRemove all the cables from the module you are going to check, and measure the resistance between
      terminals using the tester according to the table below.
i‚RjJudge whether the transistor is defective or not, using the measured values of resistance.

Measuring point Tester Normal value Judgment
i{j i|j Good Defective
G1-C1 G1 C1 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
C1 G1 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
G1-E1 G1 E1 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
E1 G1 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
C1-E1 C1 E1 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
E1 C1 approx. 700 ƒΆ 1ƒΆ or more 0ƒΆ and ‡ƒΆ
G2-C2 G2 C2 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
C2 G2 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
G2-E2 G2 E2 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
E2 G2 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ

C2-E2

C2 E2 ‡ƒΆ ‡ƒΆ other than ‡ ƒΆ
E2 C2 approx. 700ƒΆ 1ƒΆ or more 0ƒΆ and ‡ƒΆ
* The values given above should be used as a rough guide. They will vary with different types of tester and the
   internal battery's state of charge.

Caution

Before installing an IGBT module, apply silicone compound (Shin-Etsu Silicone G746 or equivalent) at the rear side of the module.
When replacing the transistor, replace TMPS 1, TMPS 2, and PS board as well.