Ignition Timing: Testing and Inspection
IGNITION TIMING CHECK 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 off.
3. Check to be sure that idle speed is within specification.
4. Connect SUZUKI scan tool to DLC (1) with ignition switch OFF, restart engine and fix ignition timing by using fixed spark mode of SUZUKI scan tool.
Special tool
(A): 09931 - 76011
(B): Mass storage cartridge
(C): 09931 - 76030
5. Set timing light to ignition harness for No.1 cylinder.
6. Using timing light, check that timing observed from viewpoint is within specification.
Initial ignition timing of viewpoint
(when it is fixed by Tech 1):
5 ± 1° BTDC
Ignition order:
1-3-4-2 (For J20 engine),
1-6-5-4-3-2 (For H25 engine)
Special tool
(A): 09930 - 76420
7. If ignition timing is out of specification, loosen flange bolt(s), 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)
8. After tightening bolt(s) (2), recheck that ignition timing is within specification.
9. After checking and/or adjusting, end fixed spark mode of SUZUKI scan tool.
NOTE: In this state, ignition timing may vary more or less of initial 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 ° (for J20 engine), 11 - 15 ° (for H25 engine) (shown in the figure). Also, check that increasing engine speed advances ignition timing.
If above check results are not satisfactory, check input signals related to this system.