Suzuki SWIFT RS415 2017, Service Manual

Page: 129 / 1257

Engine General Information and Diagnosis: 1A-81
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
WARNING:
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out by 2 persons, a driver and a tester, on a level road.
NOTE:
Check to make sure that following conditions are satisfied when using this “DTC Confirmation
Procedure”.
• Intake air temperature at engine start: –10
q
C (14
q
C) to 80
q
C (176
q
F)
• Intake air temperature: –10
q
C (14
q
C) to 70
q
C (158
q
F)
• Engine coolant temperature: 70
q
C (158
q
F) to 150
q
C (302
q
F)
• Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg, 75 kPa or more)
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature.
4) Drive vehicle at 60 km/h (38 mile/h) at 5th gear or D range.
5) Increase vehicle speed to 65 km/h (40 mile/h) at 5th gear or D range.
6) Release accelerator pedal to decrease vehicle speed to 60 km/h (38 mile/h).
7) Repeat Step 4) to 6) for 3 times.
8) Stop vehicle and check DTC and pending DTC.
DTC detecting condition Trouble area
Difference between actual throttle opening (detected from TP
sensor) and opening calculated by ECM (obtained on the basis of
engine speed and mass air flow) is out of specified range (–20
degree to 20 degree).
(2 driving cycle detection logic) • Throttle body
• TP sensor
• TP sensor circuit
• ECM
• MAF sensor
• Idle air control valve
• Air intake system