900 L4-1985cc 2.0L SOHC Turbo VIN S FI (1984)
Throttle Body: Technical Service Bulletins
Throttle Valve - Basic Setting
FILE IN S.I. Man.
VOL. I
SEC. A-2
PG. 214
SUBJECT:
BASIC SETTING OF THROTTLE VALVE
APPLICATION: 900 AND 9000 MODELS WITH LH 2.4 INJECTION SYSTEM
ISSUE:
03/89-1120
The correct basic setting of the throttle valve is important in order for the Automatic Idle Control (AIC) system to properly control the idling speed. If
the AIC system is unable to adjust the idle speed to the correct value, the LH system will isolate the AIC function and switch the idle control to the "limp
home" setting of between 1200 and 1500 rpm at normal engine temperature.
Basic Setting of the Throttle Valve
Idle speed adjustments are not required as part of the recommended service. Adjustment of the basic setting is only required if:
^
repairs are made to the throttle valve housing.
^
the idle speed is too high (with engine cold or at normal temperature).
^
fault codes 12113 and/or 12114 are stored in the ECU.
FIGURE 1
Adjusting the Basic Throttle Setting
Use the following procedure to adjust the basic setting of the throttle valve.
Tool required:
Idle Adjustment tool P/N 83 94 322
NOTE
The basic idle setting must always be done with the engine cold (68~F or less). If the engine is at normal operating temperature, the gap between the
throttle plate and the throttle housing will be too wide for proper adjustment to be possible.
1.
Loosen the mounting screws for the throttle position switch (Figure 1). Rotate the switch to the point at which it no longer acts on the throttle
plate.