Ignition Timing: AERIO
- Ensure transmission is in Neutral or Park. Set parking brake. Remove timing hole cover. See Fig 1
- Connect Suzuki scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel. See Figure
. Start engine and allow it to reach normal operating temperature. Turn all accessories off. Ensure idle speed is correct. See IDLE SPEED SPECIFICATIONS
. On scan tool, select MISC mode and fix ignition timing by selecting FIXED SPARK mode. Set timing light to No. 1 ignition coil harness. Aim timing light at timing marks. See Figure
. Ignition timing should be 4-6 degrees BTDC (at idle speed). If timing is not as specified, go to next step.
- If ignition timing is not within specification, loosen CMP sensor bolts and turn CMP sensor until timing marks line up. See Figure
. With engine idling, end FIXED SPARK MODE. Use timing light to verify that ignition timing varies more or less of initial ignition timing (about 8 degrees), indicating proper operation of electronic timing system. Also, check that timing advances when increasing engine speed. If results are not satisfactory, check the following for proper operation:
- Throttle Position Sensor
- Test Switch Signal Circuit
- Engine Control Module
If problem is found, repair or replace as necessary. After repair, retest system.
Courtesy of SUZUKI OF AMERICA CORP.