Idle Speed: Adjustments

PREPARATION

Adjustment Preparation:

CAUTION: Be extremely careful when making connections to the diagnosis connector. Incorrect connections will cause component damage.

1. Warm engine to operating temperature.
2. Turn all electrical loads "OFF."
3. Check engine condition (spark plugs, hoses, etc.)
4. If using Mazda System Selector (SST #49 B019 9A0), connect to diagnosis connector. Set test switch to "SELF-TEST" position.

NOTE: If SST is not used, install a jumper wire between diagnosis connector "TEN" and "GND" terminals.

5. Connect tachometer to diagnosis connector terminal IG-.

NOTE: When using an externally powered tachometer and/or timing light, connect it to the power connector (Blue: 1-pin). Do not ground power connector or 20A wiper fuse will blow.

ADJUSTMENT

Idle Speed Adjustment:

1. After preparation, check that idle speed is within specification:

850 ± 50 rpm

2. If not, remove blind cap from air adjust screw and adjust as needed.
3. Following adjustment, replace blind cap and disconnect SST or remove jumper wire.