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.
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HOMESERVICE MANUALSMAZDA1991323 L4-1600 1597CCREPAIR AND DIAGNOSISSPECIFICATIONSELECTRICAL SPECIFICATIONSCOMPUTERS AND CONTROL SYSTEMSSYSTEM SPECIFICATIONS
1991 Mazda 323 L4-1600 1597cc
System Specifications
1991 Mazda 323 L4-1600 1597ccSECTION System Specifications
IDLE SPEED [1] Except Canada 750 ± 50 RPM
IDLE SPEED [4] Canada only 800 ± 50 RPM
IGNITION TIMING [1] 7° ± 1° BTDC
AIRFLOW METER
Resistance value between terminals
E2 - Vs [2] 200 - 600 ohms
E2 - Vs [3] 20 - 1.2K ohms
E1 - Fc [2] infinity
E1 - Fc [3] 0 ohms
E2 - Vc 200 - 400 ohms
E2 - THA (intake air thermosensor) @
-4°F (-20°C) 13.3 - 18.4K ohms
68°F (20°C) 2.21 - 26.9K ohms
140°F (60°C) 493 - 667 ohms
CIRCUIT OPENING RELAY
Resistance value between terminals, key "OFF"
STA - E1 21 - 43 ohms
B - Fc 109 - 226 ohms
B - Fp infinity
Voltage between terminal and ground, key "ON"
Fp 0 V
Fc 12 V
B 12 V
STA 0 V
E1 0 V
Voltage between terminal and ground, key "START"
Fp 12 V
Fc 0 V
B 12 V
STA 12 V
E1 0 V
Voltage between terminal and ground at IDLE
Fp 12 V
Fc 0 V
B 12 V
STA 0 V
E1 0 V
FUEL INJECTOR
Resistance value 12 - 16 ohms
IDLE SPEED CONTROL VALVE
Resistance value 11 - 13 ohms
PURGE CONTROL SOLENOID VALVE
Resistance value 23 - 27 ohms
WATER THERMOSENSOR
Resistance value @
68°F (20°C) 2.21 - 2.69K ohms
104°F (40°C) 1.0 - 1.3K ohms
176°F (80°C) 0.29 - 0.35K ohms
[1] With test connector grounded, transmission in neutral (M/T) or "P" (A/T).
[2] Airflow meter plate fully closed.
[3] Airflow meter plate fully open.
[4] Parking brake applied and with test connector grounded, transmission in neutral (M/T) or "P" (A/T), Canada only.
IDLE SPEED [4] Canada only 800 ± 50 RPM
IGNITION TIMING [1] 7° ± 1° BTDC
AIRFLOW METER
Resistance value between terminals
E2 - Vs [2] 200 - 600 ohms
E2 - Vs [3] 20 - 1.2K ohms
E1 - Fc [2] infinity
E1 - Fc [3] 0 ohms
E2 - Vc 200 - 400 ohms
E2 - THA (intake air thermosensor) @
-4°F (-20°C) 13.3 - 18.4K ohms
68°F (20°C) 2.21 - 26.9K ohms
140°F (60°C) 493 - 667 ohms
CIRCUIT OPENING RELAY
Resistance value between terminals, key "OFF"
STA - E1 21 - 43 ohms
B - Fc 109 - 226 ohms
B - Fp infinity
Voltage between terminal and ground, key "ON"
Fp 0 V
Fc 12 V
B 12 V
STA 0 V
E1 0 V
Voltage between terminal and ground, key "START"
Fp 12 V
Fc 0 V
B 12 V
STA 12 V
E1 0 V
Voltage between terminal and ground at IDLE
Fp 12 V
Fc 0 V
B 12 V
STA 0 V
E1 0 V
FUEL INJECTOR
Resistance value 12 - 16 ohms
IDLE SPEED CONTROL VALVE
Resistance value 11 - 13 ohms
PURGE CONTROL SOLENOID VALVE
Resistance value 23 - 27 ohms
WATER THERMOSENSOR
Resistance value @
68°F (20°C) 2.21 - 2.69K ohms
104°F (40°C) 1.0 - 1.3K ohms
176°F (80°C) 0.29 - 0.35K ohms
[1] With test connector grounded, transmission in neutral (M/T) or "P" (A/T).
[2] Airflow meter plate fully closed.
[3] Airflow meter plate fully open.
[4] Parking brake applied and with test connector grounded, transmission in neutral (M/T) or "P" (A/T), Canada only.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.