Suzuki 2000 Grand Vitara SQ625 Service Manual page 643

7) If ignition timing is out of specification, check as follows.
1. Noise suppressor
2. Ignition timing
adjusting resistor
3. Character on
resistor
4. Timing belt cover
5. Ignition label
8) After checking, end fixed spark mode of SUZUKI scan tool or re-
9) With engine idling (closed throttle position and vehicle stopped),
For vehicle equipped with ignition timing adjusting resistor.
a) Check resistance of ignition timing adjusting resistor (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 for the original one recheck that initial
ignition timing is within specification.
Select and check resistor with the next consecutive character
until specified ignition timing is obtained.
For example, if the vehicle being serviced has an ignition re-
sistor 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
–1_ 0_ 1_
NOTE:
If ignition resistor has been replaced, be sure to also re-
place ignition label attached to timing belt cover with the
one that has the same symbol as that marked on ignition
resistor.
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
move service wire from monitor 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 initial
ignition timing but it is nothing abnormal.
check that ignition timing is about BTDC 6_ –10_. Also, check
that increasing engine speed advances ignition timing. If above
check results are not satisfactory, check input signals related to
ignition system.
IGNITION SYSTEM (FOR G16 ENGINE) 6F1-7
1
–5_ –4_ –3_ –2_
7 8 9 10
2_ 3_ 4_
5_
2 3 4
11
6_