Ignition Timing: Testing and Inspection

Ignition Timing Inspection

NOTE:
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 referring to Idle Speed and IAC Throttle Valve Opening Inspection.




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.
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 SUZUKI scan tool)
5 ± 1 degrees BTDC

Ignition order
1-6-5-4-3-2

Special Tool
(A): 09930-76420

7. If ignition timing is out of specification, check the followings.
- CKP sensor
- CKP sensor plate
- TP sensor
- CMP sensor
- CMP sensor rotor tooth of camshaft
- Wheel speed sensor (VSS)
- Timing chain cover installation
8. After checking initial ignition timing, release ignition timing fixation by using scan tool.
9. With engine idling (throttle opening at closed position and vehicle stopped), check that ignition timing is about 10 degrees - 16 degrees BTDC. (Constant variation within a few degrees from 10 degrees - 156 degrees BTDC indicates no abnormality but proves operation of electronic timing control system.) Also, check that increasing engine speed advances ignition timing.
If the check results are not satisfactory, check CKP sensor and ECM.