Ignition Timing: Adjustments
IGNITION TIMING INSPECTION AND ADJUSTMENTNOTE: Before starting engine, place transmission gear shift lever in "Neutral" (shift selector lever to "P" range for A/T model), and set parking brake.
1) Start engine and warm it up to normal operating temperature.
2) Make sure that all of electrical loads except ignition are switched oft.
3) Check to be sure that idle speed is within specification.
Engine idle speed: 800 ± 50 r/min.
4) [Using SUZUKI scan tool (Tech 1)]
Connect SUZUKI scan tool (Tech 1) to DLC with ignition switch OFF, restart engine and fix ignition timing by using "FIXED SPARK" mode of SUZUKI scan tool (Tech 1).
[Not using SUZUKI scan tool (Tech 1)]
(1) Remove monitor coupler cap.
(2) Disconnect scan tool from DLC if connected and ground test switch terminal in monitor coupler by using service wire so that ignition timing is fixed on initial one.
5) Set timing light to No.1 ignition harness.
6) Using timing light, check that timing observed from viewpoint is within specification.
Initial ignition timing of viewpoint (Test switch terminal grounded or fixed with Tech1):
5 ± 10 BTDC (at idle speed)
Ignition order: 1-3-4-2
Special Tool
(A): 09930-76420
7) If ignition timing is out of specification, loosen flange bolts, adjust timing by turning CMP sensor while engine is running, and then tighten bolts.
Tightening Torque
(a): 15 Nm (1.5 kg-m, 11.0 lb-ft)
8) After tightening bolts, recheck that ignition timing is within specification.
9) [Using SUZUKI scan tool (Tech 1)]
After checking and/or adjusting, End "FIXED SPARK" mode of SUZUKI scan tool (Tech 1).
[Not using SUZUKI scan too (Tech 1)]
After checking and/or adjusting, disconnect service wire from monitor coupler.
10) With engine idling (closed throttle position and vehicle stopped), check that ignition timing is about 8° BTDC. (Shown in left figure).
Also, check that increasing engine speed advances ignition timing.
If above check results are not satisfactory, check TP sensor, test switch terminal circuit and ECM/PCM.