Description Of Electric Throttle Body System Calibration; Fuel Cut Control Description - Suzuki Swift Sport 2004 Service & Repair Manual

1A-10 Engine General Information and Diagnosis:
1
6. CPU
7. Drive circuit of throttle actuator
9. From "TH MOT" fuse
10. From main relay

Description of Electric Throttle Body System Calibration

ECM calculates controlled opening of the throttle valve on the basis of the completely closed throttle valve position of
the electric throttle body system. The completely closed position data is saved in memory of ECM. However, the
completely closed position of the throttle valve of the electric throttle body system (signal voltage from throttle position
sensor when throttle is completely closed) differs one from the other depending on individual differences of the throttle
valve and throttle position sensor. As such individual differences must be taken into account for controlling the throttle
valve, it is necessary to register the completely closed throttle valve position data in ECM. When such data is
registered in ECM, it is saved in RAM (memory) of ECM and used as the base data for controlling the throttle valve.
This data is cleared, when any of the works described in "Precautions of Electric Throttle Body System Calibration" is
performed.
Also, after replacement of the throttle body and/or APP sensor, the completely closed position data in memory of ECM
must be cleared once and a new one must be registered, or ECM cannot judge the complete closure position properly.
For the procedure to register such data, refer to "Electric Throttle Body System Calibration in Section 1C". (After the
completely closed position data is cleared, ECM, for the first time only, opens and closes the throttle valve for about 5
seconds after the ignition switch is turned ON position, for registration of the completely closed throttle valve position.
If the engine is started during this registration process, such symptom as "longer cranking" or "slow rise of revolution
speed immediately after start-up" may occur. However, turning OFF the ignition switch once and restarting will set
correct registration.)

Fuel Cut Control Description

The fuel cut control in the vehicle stop is added as follows in order to prevent the over-rev.
Fuel Cut Control Table
Vehicle Condition
Stop
Run
11
2 12
17
4
11. APP sensor (main) signal
12. APP sensor (sub) signal
13. TP sensor (main) signal
14. TP sensor (sub) signal
• Engine r/min > 6,000
• Engine r/min > 4,000 for 180 seconds
• Engine r/min > 7,500 (M/T model), Engine r/min > 6,800 (A/T model)
8
9
10
3
13
14
15
15. Drive signal of throttle actuator
16. Power supply of throttle actuator
18. Control signal of throttle actuator control relay
Operative Condition
16
18
5
6
7
I4RS0B110007-02
S7RS0B1101008
S7RS0B1101009