Ignition Timing Inspection and Adjustment

NOTE: Before starting engine, place transmission gear shift lever in "Neutral", and set parking brake.

Detach timing hole cover (1).

Fig 1: Detaching Timing Hole Cover
Courtesy of SUZUKI OF AMERICA CORP.
Connect SUZUKI scan tool.
Start engine and warm it up to normal operating temperature.
Make sure that all of electrical loads except ignition are switched off.
Check to be sure that idle speed is within specification.
Idle speed

750 +/- 50 (rpm)
Fix ignition timing by using "FIXED SPARK" mode of SUZUKI scan tool.
Set timing light to No.1 ignition coil harness.
Using timing light, check that timing is within specification.
Initial ignition timing (fixed with SUZUKI scan tool)

5 +/- 1° BTDC (at idle speed)

Ignition order

1 - 3 - 4 - 2

Special tool

(A): 09930-76420

: SUZUKI scan tool

Fig 2: Inspecting Ignition Timing
Courtesy of SUZUKI OF AMERICA CORP.
If ignition timing is out of specification, loosen flange bolts (2), adjust timing by turning CMP sensor (1) while engine is running, and then tighten bolts.
Tightening torque

CMP sensor bolt (a): 15 N.m (1.5 kg-m, 11.0 lb-ft)
After tightening bolts, recheck that ignition timing is within specification.

Fig 3: Tightening CMP Sensor Bolts
Courtesy of SUZUKI OF AMERICA CORP.
After checking and/or adjusting, release fixed ignition and disconnect SUZUKI scan tool from DLC.
With engine idling (closed throttle position switch ON and vehicle stopped), check that ignition timing vary more or less of initial ignition timing (about 8°).
Also, check that increasing engine speed advances ignition timing.

If the check results are not satisfactory, check TP sensor and ECM.