Engine Controls - Sensor Operating Range Charts - 1.8L Toyota Corolla VII

INTRODUCTION

Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a diagnostic trouble code, but it may cause driveability problems.

Note. Unless stated otherwise in testing procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.

AIRFLOW METER

Airflow meter may be referred to as Mass Airflow (MAF) meter. For terminal identification and test procedures, refer to the appropriate SYSTEM/COMPONENT TESTS article.

CRANKSHAFT POSITION SENSOR

For crankshaft position sensor testing, see BASIC TESTING article.

CRANKSHAFT POSITION SENSOR RESISTANCE

ENGINE COOLANT TEMPERATURE (ECT) SENSOR

For engine coolant temperature sensor location, see information in appropriate SYSTEM/COMPONENT TESTS article. Using ohmmeter, check resistance between electrical terminals on engine coolant temperature sensor. Ensure resistance is within specification in relation to specified temperature. (Scheme 2)

Scheme 2

HEATED OXYGEN SENSOR

For heated oxygen sensor application and sensor testing, see appropriate SYSTEM/COMPONENT TESTS article.

Corolla

For intake air temperature sensor testing, see information in appropriate SYSTEM/COMPONENT TESTS article. Using ohmmeter, check resistance between electrical terminals on intake air temperature sensor. Ensure resistance is within specification in relation to specified temperature. (Scheme 2)

For MAP sensor testing, see appropriate SYSTEM/COMPONENT TESTS article.

THROTTLE POSITION (TP) SENSOR

For terminal identification and testing procedures, see appropriate SYSTEM/COMPONENT TESTS article.

COROLLA THROTTLE POSITION SENSOR RESISTANCE SPECIFICATIONS