Ignition Timing: Testing and Inspection

Ignition Timing Inspection

NOTE:
^ Ignition timing is not adjustable. If ignition timing is out of specification, check system related parts.
^ 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. Detach timing hole cover (1).




2. Connect scan tool to DLC (1) with ignition switch OFF.

Special Tool
(A) : SUZUKI scan tool (SUZUKI-SDT)

3. Start engine and warm it up to normal operating temperature.
4. Make sure that all of electrical loads except ignition are switched off.
5. Check to be sure that idle speed is within specification referring to Idle Speed and IAC Throttle Valve Opening Inspection.
6. Fix ignition timing by using Fixed Spark of Misc Test mode on scan tool.




7. Set timing light to ignition coil harness for No.1 cylinder and check that ignition timing is within specification.

Initial ignition timing (fixed with SUZUKI scan tool)
2 °- 8 ° BTDC (at specified idle speed)

Ignition order
1 - 3 - 4 - 2

Special Tool
(A) : 09930 76420

8. 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)
^ Knock sensor
^ Timing chain cover installation

9. After checking initial ignition timing, release ignition timing fixation by using SUZUKI scan tool.
10. With engine idling (throttle opening at closed position and vehicle stopped), check that ignition timing is about 3 °-17 ° BTDC. (Constant variation within a few degrees from 3 °-17 ° 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.