Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSMAZDA1991323 L4-1600 1597CCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONSCAN TOOL TESTING AND PROCEDURES
1991 Mazda 323 L4-1600 1597cc
Scan Tool Testing and Procedures
1991 Mazda 323 L4-1600 1597ccSECTION Scan Tool Testing and Procedures
NOTE: This test requires use of Mazda Special Service Tools (SST). To determine if aftermarket "Scan" tools will perform this function, check with manufacturer.
1. Connect System Selector (SST #49 B019 9A0) to diagnosis connector.
2. Set switch "A" to position "1."
3. Set "TEST SW" to "SELF-TEST."
4. Connect Self-Diagnosis Checker to System Selector and a ground.
5. Set Self-Diagnosis Checker select switch to position "A."
6. Turn ignition switch "ON."
7. Check if monitor lamp illuminates when each switch is made to function as described on image chart:
CAUTION: When any switch is activated, monitor lamp will stay "ON." Do not start engine.
If malfunctions are detected, check individual switches with these charts:
SWITCH CHECK CHARTS
Part 1
Neutral and clutch switches
Headlight switch
Rear window defroster switch
Inhibitor switch
Part 2
Throttle sensor
Stoplight switch
Blower switch
Self-Diagnosis Tools:
1. Connect System Selector (SST #49 B019 9A0) to diagnosis connector.
2. Set switch "A" to position "1."
3. Set "TEST SW" to "SELF-TEST."
4. Connect Self-Diagnosis Checker to System Selector and a ground.
5. Set Self-Diagnosis Checker select switch to position "A."
6. Turn ignition switch "ON."
7. Check if monitor lamp illuminates when each switch is made to function as described on image chart:
Switch Monitor Function:
CAUTION: When any switch is activated, monitor lamp will stay "ON." Do not start engine.
If malfunctions are detected, check individual switches with these charts:
SWITCH CHECK CHARTS
Part 1
Switch Check Chart (Part 1):
Neutral and clutch switches
Headlight switch
Rear window defroster switch
Inhibitor switch
Part 2
Switch Check Chart (Part 2):
Throttle sensor
Stoplight switch
Blower switch
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.