Manual Transaxle

NOTE: Bypass Air Control (BAC) Valve consists of the air valve and idle air control valve.

SYSTEM OPERATION

Idle Speed Control System Operation:

Air Valve

NOTE: Inspection must be done with engine cold - coolant temperature below 68°F (20°C).

1. Connect Mazda SST, or equivalent, to data link connector.
2. Set switch A to position 1 and test switch to SELF TEST.
3. Start engine. Verify that idle speed gradually decreases as engine warms up.

Idle Air Control Valve

1. Connect SST as above.
2. Start engine and verify idle speed is within specification:

IDLE SPEED: 700 ± 50 rpm

3. Unplug valve connector with test switch at SELF TEST.
4. If engine speed decreases, replace BAC valve.

COMPONENT TEST

Air Valve

Air Valve Inspection:

1. Remove BAC valve.
2. Cool valve to below 32°F (0°C).
3. Heat BAC valve at point A with a blow drier. Verify that part B moves in direction of arrow.
4. If not as specified, replace BAC valve.

Idle Air Control Valve

Idle Air Control Valve Inspection:

1. Unplug valve connector.
2. Measure resistance across valve terminals.

RESISTANCE: 7.7 - 9.3 Ohms @ 73°F (23°C)

3. If not as specified, replace BAC valve.