SUPPLEMENTAL SERVICE INFORMATION, ENGINE TUNE-UP
SUPPLEMENTAL SERVICE
INFORMATION
The following changes and/or additions have been
made since publication of the Mazda 626 Workshop
Manual (1577-10-97D).
Engine tune-up (except for GF4A-EL models)
• Inspection procedure has been modified.
• Adjustment procedure has been modified.
Fuel tank
• Inspection procedure has been has been
modified.
Fuel pump relay
• Inspection procedure has been modeified.
PCM (except GF4A-EL models)
• Inspection procedure has been modified.
Main relay
• Inspection procedure has been modified.
On-board diagnostic (except for GF4A-EL models)
• Inspection procedure has been modified.
Troubleshooting
• Inspection procedure has been modified.
ENGINE TUNE-UP
Note
• This engine tune-up is only for engines other
than GF4A-EL models. If tuning up the engine!
for GF4A-EL models, see Mazda 626
Workshop Manual (1577-10-97D).
ENGINE TUNE-UP PREPARATION
Except for GF4A-EL Models
Using the SSTs (NGS tester)
1. Warm up the engine to normal operating
temperature.
2. Shift the transaxle into neutral (MTX) or P, N
position (ATX).
3. Turn off all electrical loads.
• Headlight switch
• Blower control switch
• Rear window defroster switch
• A/C switch
4. Verify that the steering wheel is at the straight
ahead position.
5. Connect the SSTs (NGS tester) to the DLC and
select “PID/DATA MONITOR AND RECORD”.
(See F1 -30 NGS tester hook-up procedure.)
PROGRAM CARD
NGS SET
I DIAGNOSTIC TEST MODE I
PID/DATA MONITOR AND RECORD
SIMULATION TEST
DIAGNOSTIC SUPPORT PROCEDURE
l
DIAGNOSTIC TROUBLE CODE LIBRARY
s el e c t it e m a nd p r e s s t r ig g e r to s t a r i
6. Access RPM PID. Press the trigger key to enter
this selection. (See F1-33 PID/DATA monitor and
record procedure.)
7. Wait until the electrical fan stops.
Not using the SSTs (NGS tester)
1. Warm up the engine to normal operating
temperature.
2. Shift the transaxle into neutral (MTX) or N range
(ATX).
F1-20
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