Input Devices

Mass Air Flow Sensor
^ If the Vs terminal of the mass air flow sensor has an open or short circuit, Diagnostic Trouble Code No.08 will be output, and the ECM will determine intake air amount by the throttle valve opening angle.

Intake Air Temperature Sensor
^ If the intake air temperature sensor has an open or short circuit, Diagnostic Trouble Code No.11 will be output, and the ECM will use a preprogrammed intake air temperature of 20°C (68°F).
^ If the intake air temperature sensor system fails, no particular symptom will be noticed.

Throttle Position Sensor
^ If the Vref terminal has an open circuit or the TVO terminal has an open or short circuit, Diagnostic Trouble Code No.12 will be output.
^ If the Vref terminal has a short circuit, the engine will stall and will not start.
^ If the ground terminal has an open circuit, Diagnostic Trouble Code No.12 will be output.
^ In the above conditions, the ECM uses the valve of a preprogrammed throttle valve wide open throttle.
^ If the throttle position sensor system fails, decreases in idle speed will result or the engine will stall and not restart when A/C, P/S, E/L are ON.

TEN Terminal (Data Link Connector)
^ If the circuit is open, the Self-Diagnosis Checker cannot perform diagnostic trouble code checks and switch monitoring 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 ignition timing will be fixed, causing lack of power and poor acceleration. The Self-Diagnosis Checker cannot perform sensor monitoring checks.
^ If the circuit is shorted, the coolant fan operates whenever the throttle valve is opened.

Daytime Running Light Unit (Canada)
^ If the circuit is open, idle speed may be slightly low.
^ If the circuit is shorted, idle speed may be slightly high.

Closed Throttle Position Switch
^ The switch monitor function can confirm the presence of an open or short circuit.
^ If the circuit is open, the fan operates continuously with the TEN terminal grounded in the data link connector or idle speed is high after warm-up.
^ If the circuit is shorted, idle speed stays or hunts at approx. 2,000 rpm.

Heated Oxygen Sensor
^ If sensor output voltage is not generated because of an open or short circuit, Diagnostic Trouble Code No.15 or 17 is output.
^ If the heated oxygen sensor output voltage continues unchanged 40 sec. after the engine exceeds 1,500 rpm, Diagnostic Trouble Codes No.17 is output.
^ In the above conditions, no closed loop control will be present and no symptom will be noticed.




0: Normal x: Malfunction

Camshaft Position Sensor (SGT, SGC Signal)
^ If the SGT signal circuit has an open or short, Diagnostic Trouble Code No.02 is output.
^ If the SGC signal circuit has an open or short, Diagnostic Trouble Code No.03 is output.

Starter Signal
^ A lack of starter signal input will cause hard starting.

P/S Pressure Switch
^ If the circuit is open or shorted, no symptom will be noticed.

A/C Signal (Air Conditioning Switch)
^ The switch monitor function can confirm the presence of an open or short circuit.
^ If the circuit is open, the air conditioner will not operate.
^ If the circuit is shorted, the air conditioner will constantly operate when the blower is ON.

Engine Coolant Temperature Sensor
^ If the temperature sensor has an open or short circuit, Diagnostic Trouble Code No.09 is output, and the ECM uses a preprogrammed temperature value of 34°C (93°F).
^ A malfunction in the engine coolant temperature sensor system may cause hesitation, engine stalling, high idle speed after warm-up or hard starting.

Blower Signal
^ The switch monitor function can confirm the presence of an open or short circuit.
^ If the circuit has an open or short, no symptom will be noticed.

Brake Signal
^ The switch monitor function can confirm the presence of an open or short circuit.
^ An open or short circuit will produce no symptom.

Vehicle Speed Sensor
^ If the circuit is open or shorted, no symptom will be noticed.

Neutral and Clutch Switches
^ The switch monitor function can confirm the presence of an open or short circuit.
^ An open or short circuit will produce no symptom.

Rear Window Defroster Switch
^ The switch monitor function can confirm the presence of an open or short circuit.
^ If the circuit is open, no symptom will be noticed.
^ If the circuit is shorted, the defroster operates continuously.

Headlight Switch
^ The switch monitor function can confirm the presence of an open or short circuit.
^ If the circuit is open or shorted, no symptom will be noticed.

EGR Valve Position Sensor
^ If the circuit is open or shorted, Diagnostic Trouble Code No.16 will be output.