Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 752

7) If ignition timing is out of specification, check as follows.
For vehicle equipped with ignition timing adjusting resistor
(2).
a) Check resistance of ignition timing adjusting resistor (2) (if
equipped), referring to "Ignition Resistor" under "On-Vehicle
Service" later in this section.
b) If check result is not satisfactory, change ignition resistor
with consecutive character (3) for the original one recheck
that initial ignition timing is within specification.
Select and check resistor with the next consecutive charac-
ter until specified ignition timing is obtained.
For example, if the vehicle being serviced has an ignition
resistor with an "5" mark, initial ignition timing can be
changed by replacing it with "4" or "N".
Character on resistor (3)
Difference in advance degrees as
compared with those of "N"
5 N 6 7
–1° 0° 1° 2°
NOTE:
If ignition resistor has been replaced, be sure to also
replace ignition label attached to timing belt cover (4)
with the one that has the same symbol as that marked on
ignition resistor (5).
1. Noise suppressor
For vehicle not equipped with ignition timing adjusting resistor.
Check the followings :
– CMP sensor and CKP sensor (if equipped)
– Signal rotor on camshaft
– TP sensor
– VSS
– Crankshaft pulley/timing belt cover installation
8) After checking, end fixed spark mode of SUZUKI scan tool or
remove 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.
IGNITION SYSTEM (FOR G16 ENGINE) 6F1-9
1 2
–5° –4°
8 9 10 11
3° 4° 5° 6°
3 4
–3° –2°