Mazda RX-7 Engine Performance Testing with Codes: trouble code charts and more

Mazda RX7 1993-1995 FD3S

Self-Diagnostics PART 1

SELF-DIAGNOSTIC SYSTEM

HARD FAILURES

Hard failures cause Malfunction Indicator Light (MIL) to illuminate and remain on until the malfunction is repaired. If light comes on and remains on (light may flash) during vehicle operation, cause of malfunction must be determined using trouble code charts. See TROUBLE CODE CHARTS . If a sensor fails, Engine Control Module (ECM) will use a substitute value in its calculations to continue engine operation. In this condition, vehicle is functional, but loss of good driveability will most likely be encountered.

INTERMITTENT FAILURES

Intermittent failures may cause Malfunction Indicator Light (MIL) to flicker or illuminate and go out after the intermittent fault goes away. Corresponding trouble code, however, will be retained in Engine Control Module (ECM) memory. If related fault does not reoccur within a certain time frame, related trouble code will be erased from ECM memory. Intermittent failures may be caused by sensor, connector or wiring related problems.

RETRIEVING CODES

Trouble Code Access Using Test Equipment
1. Use Self Diagnostic Checker (49 H018 9A1) and System Selector (49 B019 9A0) to retrieve trouble codes. Connect one lead of self diagnostic checker to ground and the other to system selector. Connect system selector to data link connector.
2. With ignition on and engine off, verify No. 88 flashes on display and buzzer sounds for 3 seconds. If No. 88 does not flash, check main relay, power supply circuit, and connector wiring. Repair or replace as necessary. If No. 88 flashes and buzzer sounds for more than 20 seconds, check for short circuit between ECM terminal 1F and data link connector. Replace ECM as necessary and reconnect test equipment.
3. Note trouble codes. If more than one code is present, codes will be displayed in numerical order. Clear codes after repairs are complete.

Trouble Code Access Using Data Link Connector
1. If system selector is not available, connect a jumper wire between terminals TEN and GND of data link connector. See Fig. 1. Observe Malfunction Indicator Light (MIL). Note trouble codes.
2. If light remains on continuously, MIL circuit is grounded or ECM is defective. If more than one code is present, codes will be displayed in numerical order. Clear codes after repairs are complete.

Fig. 1: Locating Data Link Connector

CLEARING CODES

Disconnect negative battery cable for at least 20 seconds and depress brake pedal. Reconnect negative battery cable. Connect one lead of Self Diagnostic Checker (49 H018 9A1) to ground and the other to System Selector (49 B019 9A0). Connect system selector to data link connector. Turn ignition on for 6 seconds with engine off. Start and warm engine, then run at 2000 RPM for 3 minutes. Verify no codes are displayed.

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TROUBLE CODE IDENTIFICATION CHARTS

Fig. 2: Diagnostic Trouble Code Definition Chart (1 Of 4)

Fig. 3: Diagnostic Trouble Code Definition Chart (2 Of 4)

Fig. 4: Diagnostic Trouble Code Definition Chart (3 Of 4)

Fig. 5: Diagnostic Trouble Code Definition Chart (4 Of 4)

TROUBLE CODE IDENTIFICATION TABLE

• DTC 2: Crankshaft Position Sensor - NE Sensor
• DTC 3: Crankshaft Position Sensor - G Sensor
• DTC 5: Knock Sensor
• DTC 6: Vehicle Speed Sensor
• DTC 9: Engine Coolant Temperature Sensor
• DTC 11: Intake Air Temperature Sensor
• DTC 12: Throttle Position Sensor - Full Range
• DTC 13: Manifold Absolute Pressure Sensor
• DTC 14: Barometric Absolute Pressure Sensor - In ECM
• DTC 15: Oxygen Sensor - Inactivation
• DTC 17: Oxygen Sensor - Inversion
• DTC 18: Throttle Position Sensor - Narrow Range
• DTC 20: Metering Oil Pump Position Sensor
• DTC 23: Fuel Thermosensor
• DTC 25: PRC Solenoid Valve
• DTC 26: Metering Oil Pump Stepping Motor
• DTC 27: Metering Oil Pump
• DTC 30: Split Air By-Pass Solenoid Valve
• DTC 31: Secondary Air By-Pass Valve
• DTC 32: Secondary Air Switching Valve
• DTC 33: Port Air By-Pass Solenoid Valve
• DTC 34: Idle Air Control Solenoid Valve
• DTC 37: Metering Oil Pump
• DTC 38: Accelerated Warm-Up System Solenoid Valve
• DTC 39: Relief 2 Solenoid Valve
• DTC 40: Purge Solenoid Valve
• DTC 42: Turbo Pre-Control Solenoid Valve
• DTC 43: Wastegate Control Solenoid Valve
• DTC 44: Turbo Control Solenoid Valve
• DTC 45: Charge Control Solenoid Valve
• DTC 46: Charge Relief Solenoid Valve
• DTC 50: Double Throttle Control Solenoid Valve
• DTC 51: Fuel Pump Relay - Speed
• DTC 54: Air Pump Relay
• DTC 71: Fuel Injector - Front Secondary
• DTC 73: Fuel Injector - Rear Secondary
• DTC 76: Slip Torque Converter Clutch Operation Off Signal
• DTC 77: Torque Reduced Signal

TROUBLE CODE CHARTS

Trouble Codes No. 1, 6, 7, 12, 55, 56, 57, 58, 60, 61, 62, 63, 64 and 65 are automatic transmission related problems.

CODE 2: CRANKSHAFT POSITION SENSOR - NE SENSOR

Fig. 6: Trouble Code No. 2 Crankshaft Position Sensor - NE Sensor

Fig. 7: Trouble Code No. 2 Crankshaft Position Sensor Circuit Diagram

CODE 3: CRANKSHAFT POSITION SENSOR - G SENSOR

Fig. 8: Trouble Code No. 3 Crankshaft Position Sensor - G Sensor

Fig. 9: Trouble Code No. 3 Crankshaft Position Sensor Circuit Diagram

CODE 5: KNOCK SENSOR

Fig. 10: Trouble Code No. 5 Knock Sensor

Fig. 11: Trouble Code No. 5 Knock Sensor Circuit Diagram

CODE 6: VEHICLE SPEED SENSOR

Fig. 12: Trouble Code No. 6 Vehicle Speed Sensor

Fig. 13: Trouble Code No. 6 Vehicle Speed Sensor Circuit Diagram

CODE 9: ENGINE COOLANT TEMPERATURE SENSOR

Fig. 14: Trouble Code No. 9 Engine Coolant Temperature Sensor

Fig. 15: Trouble Code No. 9 Engine Coolant Temperature Sensor Circuit Diagram

CODE 11: INTAKE AIR TEMPERATURE SENSOR

Fig. 16: Trouble Code No. 11 Intake Air Temperature Sensor

Fig. 17: Trouble Code No. 11 Intake Air Temperature Sensor Circuit Diagram

CODE 12: THROTTLE POSITION SENSOR - FULL RANGE

Fig. 18: Trouble Code No. 12 Throttle Position Sensor - Full Range

Fig. 19: Trouble Code No. 12 Throttle Position Sensor Circuit Diagram




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Mazda RX7 1993-1995 FD3S

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