Input Devices

[Input Device]

1-2 Switch (M/T)
- If the circuit has an open or short, no symptom will be noticed.




Air Conditioning Sensor
- The switch monitor function can confirm the presence of an open or short circuit.
- If the circuit is open, the air conditioner (the magnetic clutch) will not operate.
- If the circuit is shorted, the air conditioner will constantly operate when the blower is ON.

Barometric Absolute Pressure Sensor
- The sensor is contained in the PCME.
- If the sensor has an open or short circuit, Trouble Code No. 14 is output, and the PCME will use a preprogrammed pressure of sea level.
- A malfunction in the sensor causes engine roughness at high elevation.




Clutch Switch (M/T)




Crankshaft Position Sensor (NE, G Signal)
- If the NE signal circuit has an open or short, Trouble Code No. 02 is output.
- If the G signal circuit has an open or short, Trouble Code No. 03 is output.
- If the NE or G signal circuit has an open or short, the engine will not start (No fuel injection and no ignition).




Electrical Load (E/L) Unit
- If the circuit has an open, the switch monitor function can confirm that the blower fan, headlight, rear window defroster, signals are not input to the PCME.
- If the circuit is short, the Idle speed will be increased slightly.




EGR Function Sensor
- If the EGR function sensor or circuit has an open or short, Trouble Code No. 16 is output.




Engine Coolant Temperature Sensor
- If the thermosensor or circuit has an open or short, Trouble Code No. 09 is output, and PCME uses a preprogrammed temperature value of 82°C (180°F).
- A malfunction in the engine coolant temperature sensor or its circuit will cause hard starting or engine stall when engine is cold.
- In the above condition, the electric coolant fan will constantly operate when the ignition switch is ON.




Fuel Thermosensor
- It the thermosensor circuit has an open or short, Trouble Code No. 23 is output.
- In the above conditions, the PCME will use a preprogrammed temperature value of 50°C (122°F) and no symptom will be noticed.




Heat Hazard Sensor
- If the circuit has open, no symptom will be noticed.
- If the sensor or circuit has a short, the heat hazard warning light will illuminate and the air pump will not operate, causing rough idle.




Intake Air Temperature Sensor
- If the thermosensor or circuit has an open or short, Trouble Code No. 11 is output.
- In the above conditions, no symptom will be noticed.




Knock Sensor
- If the knock sensor or circuit has an open or short, Trouble Code No. 05 is output.
- In the above conditions, ignition timing is retarded.




Manifold Absolute Pressure Sensor
- If the sensor or circuit has an open or short, Trouble Code No. 13 is output.
- In the above condition, the PCME uses a preprogrammed fuel injection amount, causing rough idle and poor acceleration with afterburn.




Metering Oil Pump Position Sensor
- If the sensor or circuit has an open or short, Trouble Code 20 is output.
- In the above conditions, the fuel injection amount is fixed, causing poor acceleration and hesitation.







Mileage Switch/Steering Pressure Sensor
- If the sensor circuit has an open circuit, no particular symptom will be noticed.
- If the sensor circuit has a short circuit, idle speed will be increased.




Neutral Switches (M/T)
- The switch monitor function of the Self-Diagnosis Checker can confirm the presence of an open or short circuit.
- If the circuit is open, the idle speed drops when the A/C, P/S, or electrical load is ON.




Oxygen Sensor
- If the sensor output voltage continues below 0.55V for 100 sec. after the engine exceeds 1,500 rpm because of an open or short circuit, Trouble Code No. 15 is output.
- If the sensor output voltage continues unchanged 50 Sec, after the engine exceeds 1,500 rpm, Trouble Code No. 17 is output.
- In the above conditions, no fuel injection closed loop control will be present and no symptom will be noticed.




Park/Neutral Signal (A/T)
- If the circuit is open or shorted, the idle speed will be slightly low in R, D, S, and L ranges.




Reduce Torque Signal (A/T)
- If a malfunction occurs in the reduce torque signal, the torque reduction control system is inhibited and line pressure will be high at shifting. Shift shock may be slightly increased.

Slip Lockup OFF Signal:

Slip Lockup Signal:

Slip Lock-Up Signal (A/T)
- If a malfunction occurs in the slip lock-up signal, line pressure will be high at shifting and shift shock may be slightly increased.




Solenoid Valve (Shift A) (A/T)




Solenoid Valve (Shift B) (A/T)


Start Signal
- A lack of engine cranking signal will cause hard starting when engine is cold.




Steering Pressure Sensor
- Refer to "Mileage Switch".




Stoplight Switch
- The switch monitor function can confirm the presence of an open or short circuit.
- An open or short circuit will produce no symptom.
- A short circuit will cause the STOP fuse (2OA) burn out.




TEN Terminal (Data Link Connector)
- If the circuit is open, the Self-Diagnosis Checker can not perform trouble code checks.
- If the circuit is shorted, the opening amount of the idle air control valve will not change, causing hard starting and rough idle. The Self-Diagnosis Checker cannot perform sensor monitoring checks.




Throttle Position Sensor
(Narrow Range)
- If the sensor or circuit has an open or short, Trouble Code No. 18 is output.
- In the above condition, rough idle, and engine stall on deceleration will be caused.

(Full Range)
- If the sensor or circuit has an open or short, Trouble Code No. 12 is output.
- In the above condition, poor acceleration will be caused.




Vehicle Speed Sensor
- If the vehicle speed signal circuit has an open or short, Trouble Code No. O6 is output.
- If the circuit has open or short, hold mode will not operate.