Home ReviewsRefund
Home/Mazda/MX-5/Mazda MX-5 NB (1998-2001)/Repair manual/Testing & Diagnostics/Engine Controls - Self-Diagnostics - Introduction: Overview
Contents Wiring diagrams Section: Testing & Diagnostics All sections

Engine Controls - Self-Diagnostics - Introduction: Overview Mazda MX-5 NB

Testing & Diagnostics 13 illustrations ~153 words

Perform all steps in BASIC DIAGNOSTIC PROCEDURES article. If no fault is found while performing BASIC DIAGNOSTIC PROCEDURES, proceed with self-diagnostics. If no diagnostic trouble codes or only pass codes (system functioning properly) are found during self-diagnostics, proceed to TROUBLE SHOOTING - NO CODES article for diagnosis by symptom.

DIAGNOSTIC TROUBLE CODE IDENTIFICATION

DTCDIAGNOSTIC/System Affected
P0102Mass Air Flow Sensor, Low Input
P0103Mass Air Flow Sensor, High Input
P0106Barometric Pressure Sensor Circuit Malfunction
P0107Barometric Pressure Sensor, Low Input
P0108Barometric Pressure Sensor, High Input
P0111Intake Air Temperature Sensor Circuit Malfunction
P0112Intake Air Temperature Sensor, Low Input
P0113Intake Air Temperature Sensor, High Input
P0117Engine Coolant Temperature Sensor, Low Input
P0118Engine Coolant Temperature Sensor, High Input
P0122Throttle Position Sensor, Low Input
P0123Throttle Position Sensor, High Input
P0125Excessive Time To Enter Closed Loop Fuel Control
P0130Front Heated Oxygen Sensor Circuit Malfunction
P0134Front Heated Oxygen Sensor, No Activity Detected
P0138Rear Heated Oxygen Sensor, High Input
P0140Rear Heated Oxygen Sensor, No Activity Detected
P0171Fuel Trim Too Lean
P0172Fuel Trim Too Rich
P0300Random Misfire Detected
P0301Cylinder No. 1 Misfire Detected
P0302Cylinder No. 2 Misfire Detected
P0303Cylinder No. 3 Misfire Detected
P0304Cylinder No. 4 Misfire Detected
P0325Knock Sensor Circuit Malfunction
P0335Crankshaft Position Sensor Circuit Malfunction
P0339Camshaft Position Sensor Circuit Intermittent Malfunction
P0401Exhaust Gas Recirculation Insufficient Flow
P0402Exhaust Gas Recirculation Excessive Flow
P0420 (1)Catalyst System Efficiency Below Threshold
P0421 (2)Catalyst System Efficiency Below Threshold
P0422EVAP Emission System Malfunction (Excessive Leak)
P0443Evaporative Emission Control System Purge Control Valve Circuit Malfunction (Excessive Leak)
P0446Evaporative Emission Control System Malfunction (Vent Control)
P0452Evaporative Emission Control System Pressure Sensor, Low Input
P0453Evaporative Emission Control System Pressure Sensor, High Input
P0455Evaporative Emission Control System Malfunction (Excessive Leak)
P0461Fuel Level Sensor Circuit Malfunction
P0462Fuel Level Sensor Circuit Low Input
P0463Fuel Level Sensor Circuit High Input
P0500Vehicle Speed Sensor Malfunction
P0506Idle Control System, RPM Lower Than Expected
P0507Idle Control System, RPM Higher Than Expected
P0550Power Steering Pressure Switch Circuit Malfunction
P0703Brake Switch Input Malfunction
P0704Clutch Switch Input Circuit Malfunction
P1102Mass Air Flow Inconsistent With Throttle Position Sensor (Lower Than Expected)
P1103Mass Air Flow Inconsistent With RPM (Greater Than Expected)
P1122Throttle Position Stuck Closed
P1123Throttle Position Stuck Open
P1135Front Heated Oxygen Sensor Heater Circuit Low
P1136Front Heated Oxygen Sensor Heater Circuit High
P1141Rear Heated Oxygen Sensor Heater Circuit Low
P1142Rear Heated Oxygen Sensor Heater Circuit High
P1170Front Heated Oxygen Sensor - Inversion
P1345No SGC Signal
P1449Canister Drain Cut Valve Open Or Short
P1450Evaporative Emission Control System Malfunction
P1487EGR Boost Sensor Solenoid Valve Open Or Short
P1496EGR Valve Motor Coil No. 1 Open Or Short
P1497EGR Valve Motor Coil No. 2 Open Or Short
P1498EGR Valve Motor Coil No. 3 Open Or Short
P1499EGR Valve Motor Coil No. 4 Open Or Short
P1504Idle Air Control Circuit Malfunction
P1523VICS Circuit Malfunction
P1562PCM +BB Voltage Low
P1601 (3)PCM-TCM Communication Error
P1608PCM Malfunction
P1609PCM Malfunction (Knock Sensor Circuit)
P1631Generator Output Voltage Signal (No Electricity)
P1632Battery Voltage Monitor Signal Circuit Malfunction
P1633Battery Overcharge
P1634Generator Terminal "B" Circuit Open
(1) Except California emission models. (2) California emission models (3) A/T models.
(1)Except California emission models.
(2)California emission models
(3)A/T models.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION - MIATA

DTCDIAGNOSTIC/System Affected
P0100Mass Air Flow/Volume Air Flow Sensor
P0105 (1)Manifold Absolute Pressure/Barometric Pressure Sensor
P0110Intake Air Temperature Sensor
P0115Engine Coolant Temperature Sensor
P0120Throttle Position Sensor
P0125Excessive Time To Enter Closed Loop Fuel Control
P0130Right Front Heated Oxygen Sensor
P0134Right Front Heated Oxygen Sensor, No Activity Detected
P0135Right Front Heated Oxygen Sensor Heater
P0136 (2)Middle Heated Oxygen Sensor
P0138 (1)Right Rear Heated Oxygen Sensor High Voltage
P0140Middle/Right Rear Heated Oxygen Sensor, No Activity Detected
P0141Middle/Right Rear Heated Oxygen Sensor Heater
P0144 (2)Rear Heated Oxygen Sensor High Voltage
P0146 (2)Rear Heated Oxygen Sensor, No Activity Detected
P0147 (2)Rear Heated Oxygen Sensor Heater
P0150Left Front Heated Oxygen Sensor
P0154Left Front Heated Oxygen Sensor, No Activity Detected
P0155Left Front Heated Oxygen Sensor Heater
P0158 (1)Left Rear Heated Oxygen Sensor High Voltage
P0160 (1)Left Rear Heated Oxygen Sensor, No Activity Detected
P0161 (1)Left Rear Heated Oxygen Sensor Heater
P0170Fuel Trim/Right Bank Fuel Trim Malfunction
P0173Left Bank Fuel Trim Malfunction
P0300Random Misfire Detected
P0301Cylinder No. 1 Misfire Detected
P0302Cylinder No. 2 Misfire Detected
P0303Cylinder No. 3 Misfire Detected
P0304Cylinder No. 4 Misfire Detected
P0305Cylinder No. 5 Misfire Detected
P0306Cylinder No. 6 Misfire Detected
P0325Knock Sensor No. 1 DIAGNOSTIC
P0335Crankshaft Position Sensor
P0400Exhaust Gas Recirculation Flow Malfunction
P0404Exhaust Gas Recirculation DIAGNOSTIC Range/Performance
P0420 (2)Right Bank Catalyst System Efficiency Below Threshold
P0421 (1)Right Bank Catalyst System Efficiency Below Threshold
P0431 (1)Left Bank Catalyst System Efficiency Below Threshold
P0442Evaporative Emission Control System (Leak Check)
P0443Evaporative Emission Control System Purge Control Valve
P0450Evaporative Emission Control System (Pressure Sensor)
P0451Fuel Tank Pressure Sensor Stuck Low
P0455Evaporative Emission Control System (Excessive Leak)
P0464Fuel Gauge Sender Unit Intermittent
P0500Vehicle Speed Sensor
P0505Idle Control System
P0510Closed Throttle Position Switch
P0550Power Steering Pressure Switch
P0703Brake Switch Input Malfunction
P1110 (1)Intake Air Temperature Sensor (Dynamic Chamber)
P1113 (1)Intake Air Temperature Sensor (Lysholm Compressor)
P1169 (2)Middle Heated Oxygen Sensor - Inversion
P1170Front/Right Front Heated Oxygen Sensor - Inversion
P1173Left Front Heated Oxygen Sensor - Inversion
P1195 (2)EGR Boost Sensor - Barometric Pressure Signal
P1196Ignition Switch (Start) Open Or Short
P1250PRC Solenoid Valve
P1345No SGC Signal
P1402EGR Valve Position Sensor
P1449Canister Drain Cut Valve
P1450Evaporative Emission Control System
P1455Fuel Gauge Sender Unit
P1487EGR Boost Sensor Solenoid Valve
P1508 (1)Bypass Air Solenoid Valve No. 1
P1521 (2)VRIS Solenoid Valve No. 1
P1522 (2)VRIS Solenoid Valve No. 2
P1524 (1)Charge Air Cooler Bypass Solenoid Valve Open Or Short
P1525 (1)ABV Solenoid Valve (Vent)
P1526 (1)ABV Solenoid Valve (Vacuum)
P1540 (1)ABV Control System
P1601 (1)PCM-TCM Communication Error
P1609PCM/PCM Malfunction
P1627PCM-ABS/TCS Communication Error
P1628 (1)PCM-ABS/TCS Communication Error
P1794Battery
P1795 (1)Closed Throttle Position Switch
P1797 (2)Transmission Range Or Neutral/Clutch Switch Signal
(1) 2.3L engine only. (2) 2.5L engine only.
(1)2.3L engine only.
(2)2.5L engine only.

DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION - MILLENIA

CONNECTOR IDENTIFICATION

Harness connector terminal identification illustrations are generic and categorized by number of terminals. For terminal identification of connectors with 1 or 2 terminals, see WIRING DIAGRAMS article. All connector views are terminal side unless otherwise specified. For harness connector terminal identification, see HARNESS CONNECTOR IDENTIFICATION DIRECTORY .

DescriptionSee Fig.
Miata
Crankshaft Position Sensor7
EGR Boost Sensor7
EGR Valve19
Fuel Pump18
Fuel Tank Pressure Sensor8
Front Heated Oxygen Sensor9
Mass Air Flow Sensor8
Powertrain Control Module (1)15
Rear Heated Oxygen Sensor (2)9
Rear Heated Oxygen Sensor (3)10
Throttle Position Sensor8
Millenia (2.3L)
Camshaft Position Sensor11
Crankshaft Position Sensor8
EGR Valve Position Sensor7
Fuel Gauge Sending Unit7
Fuel Tank Pressure Sensor7
Left Front Heated Oxygen Sensor7
Left Rear Heated Oxygen Sensor8
Intake Air Temperature Sensor12
Manifold Absolute Pressure Sensor7
Mass Air Flow Sensor7
Powertrain Control Module (1)16
Right Front Heated Oxygen Sensor8
Right Rear Heated Oxygen Sensor10
Throttle Position Sensor11
Transmission Control Module (4)17
Millenia (2.5L)
Crankshaft Position Sensor8
Distributor12
EGR Boost Sensor8
EGR Valve Position Sensor7
Fuel Gauge Sending Unit7
Fuel Tank Pressure Sensor7
Left Front Heated Oxygen Sensor10
Mass Air Flow Sensor7
Middle Heated Oxygen Sensor9
Powertrain Control Module (1)16
Rear Heated Oxygen Sensor9
Right Front Heated Oxygen Sensor10
Throttle Position Sensor11
(1) Component connector view. (2) California emission models (3) Except California emission models. (4) Harness connector view.
(1)Component connector view.
(2)California emission models
(3)Except California emission models.
(4)Harness connector view.

HARNESS CONNECTOR IDENTIFICATION DIRECTORY

Scheme 14

Scheme 14
Scheme 14

Scheme 15

Scheme 15
Scheme 15

Scheme 16

Scheme 16
Scheme 16

Scheme 17

Scheme 17
Scheme 17

Scheme 18

Scheme 18
Scheme 18

Scheme 19

Scheme 19
Scheme 19

Scheme 20

Scheme 20
Scheme 20

Scheme 21

Scheme 21
Scheme 21

Scheme 22

Scheme 22
Scheme 22

Scheme 23

Scheme 23
Scheme 23

Scheme 24

Scheme 24
Scheme 24

Scheme 25

Scheme 25
Scheme 25

Scheme 26

Scheme 26
Scheme 26

More articles — Engine Controls - Self-Diagnostics - Introduction