A/T, TPS, Idle Switch - Poor Driveability: Overview

Group: TRANSAXLE

Number: 97A0-029

Date: SEPTEMBER, 1997

Model 1996-97 2.0L SONATA
1995-97 3.0L SONATA

Subject
TRANSAXLE DRIVEABILITY ([1][2]THROTTLE POSITION SENSOR AND IDLE SWITCH ADJUSTMENT PROCEDURE)

DESCRIPTION:

Correct adjustment of the throttle position sensor (TPS) and idle switch is essential for proper driveability. A TPS or idle switch out of adjustment may cause one or more of the following driveablity conditions:

^ Park to Reverse or Park to Drive engagement shock

^ Engine speed fluctuation between 1000 - 1700 rpm during slow cruise at light throttle opening or during deceleration

^ Harsh 4-3 downshift shock when decelerating to a stop

^ Harsh 1-2 and 2-3 upshift

^ Rough idle

The idle switch is incorporated in the TPS assembly on the 1996-97 2.0L and 1995-97 3.0L Sonata. To ensure proper adjustment, the idle switch is used to make the initial adjustment to the assembly. After adjustment, confirm that the falls within the standard value range given in the Shop Manual and this TSB.

WARRANTY INFORMATION:
Normal warranty operation codes and times apply.