Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 768

7) If ignition timing is out of specification, loosen flange bolt(s)
(2), adjust timing by turning CMP sensor (1) while engine is
running, and then tighten bolt(s) (2).
Tightening torque
CMP sensor bolt (a) : 15 N·m (1.5 kg-m, 11.0 lb-ft)
[A] : J20 Engine
[B] : H25 Engine
8) After tightening bolt(s), recheck that ignition timing is within
specification.
9) After checking and/or adjusting, end fixed spark mode of
SUZUKI scan tool or disconnect service wire from diagnosis
connector.
CAUTION:
Driving with test switch terminal grounded will cause
damage to catalyst.
Be sure to disconnect service wire after adjustment.
NOTE:
In this state, ignition timing may vary more or less of ini-
tial ignition timing but it is nothing abnormal.
10) With engine idling (closed throttle position and vehicle
stopped), check that ignition timing is about BTDC 12° – 16°
(J20 engine), 10° – 13° (H25 engine with diagnosis connec-
tor), 6° – 12° (H25 engine without diagnosis connector)
(shown in the figure). Also, check that increasing engine
speed advances ignition timing.
If above check results are not satisfactory, check input sig-
nals related to this system.
[A] : J20 Engine
[B] : H25 Engine
1. Viewpoint
2. Timing mark on chain cover
3. Timing mark on crankshaft pulley
IGNITION SYSTEM (FOR J20/H25 ENGINES) 6F2-9