Suzuki Wagon R RB310, Supplementary Service Manual

Page: 71 / 254

6F1-8 IGNITION SYSTEM (ELECTRONIC IGNITION SYSTEM)
INSPECTION
1) Connect SUZUKI scan tool to DLC with ignition switch OFF.
Special tool
(A): SUZUKI scan tool
2) Start engine and warm it up to normal operating tempera-
ture.
3) Make sure that all of electrical loads except ignition are
switched off.
4) Check to be sure that idle speed is within specification.
(Refer to SECTION 6E)
5) Select “MISC” mode on SUZUKI scan tool and fix ignition
timing to initial one.
6) Open air cleaner upper case and shift upper case and hose
position to observe ignition timing.
7) Using timing light (1), check that ignition timing is within
specification.
Initial ignition timing (fixed with SUZUKI scan tool)
: 5 ± 3° BTDC at idle speed
Ignition order
: 1-3-4-2
8) If ignition timing is out of specification, check the followings:
• CKP sensor
• Crankshaft timing belt pulley (signal rotor)
• TP sensor
• VSS
• Timing belt cover installation
9) After checking Initial Ignition Timing, release ignition timing
fixation by using SUZUKI scan tool.
10) With engine idling (throttle opening at closed position and
car stopped), check that ignition timing is about 9°–15°
BTDC. (Constant variation within a few degrees from 9°–15°
indicates no abnormality but proves operation of electronic
timing control system.) Also, check that increasing engine
speed advances ignition timing.
If above check results are not satisfactory, check CKP sen-
sor and ECM.
11) Install air cleaner upper case.