Mazda 626 Station Wagon, Workshop Manual

Page: 42 / 577

ENGINE TUNE-UP
3. Turn off all electrial loads.
• Headlight switch
• Blower control switch
• Rear defroster switch
• A/C switch
4. Verify that the steering wheel is at straight ahead
position.
Caution
• Connecting the wrong DLC terminal may
possibly cause a malfunction. Carefully
connect the specified terminal only.
5. Connect a dwell tachometer to the DLC terminal
IG-.
DATA LINK
IG
6. Wait until the electrical fan stops.
IGNITION TIMING INSPECTION
Except for GF4A-EL Models
Using the SSTs (NGS tester)
1. Perform “ENGINE TUNE-UP PREPARATION”.
2. Verify that the RPM PID is within the specification.
• If not as specified, adjust the idle speed by
turning the AAS. (See F1-22 IDLE SPEED
ADJUSTMENT.)
Specification
600—700 (650 ± 50)rpm
3. Connect the timing light to the high-tension lead
of No.1 cylinder.
4. Verify that the timing mark (yellow) on the
crankshaft pulley is within the specification.
• If not as specified, inspect the following:
— CMP sensor (See Section F.)
— CKP sensor (See Section F.)
— TP sensor (See Section F.)
— ECT sensor (See Section F.)
— Neutral switch (MTX) (See Section F.)
— Clutch switch (MTX) (See Section F.)
— TR switch (ATX) (See K2-30 TRANSAXLE
RANGE (TR) SWITCH INSPECTION.)
• If the devices are normal, replace the PCM.
(See Section F.)
CRANKSHAFT PULLEY
Specification
BTDC 6°—18° (12° ±6°)
Not using the SSTs (NGS tester)
1. Perform “ENGINE-TUNE UP PREPARATION”.
2. Connect a dwell tachometer to DLC terminal IG-
DATA LINK
3. Verify that the idle speed is normal.(See F1 -22
IDLE SPEED ADJUSTMENT.)
4. Connect the timing light to the high-tension lead
of the No.1 cylinder.
5. Verify that the timing mark (yellow) on the
crankshaft pulley is within the specification.
Specification
BTDC 6°—18“
(
12
° ±
6
°)
6. Verify that the timing mark (yellow) on the
crankshaft pulley is within the specification.
• If the devices are normal, replace the
PCM.(See Section F).
F1-21