Table for checking the circuit of the control unit of the oil level indicator system.
Models 2L-T and 1KZ-T from 1993
1. Checking the indicator.
A) Disconnect the connector from the oil level sensor.
b) Ground terminal 2 of the connector on the wiring side.
V) Turn on the ignition: the indicator should light up. If the indicator does not light up, then check the indicator lamp.
2. Checking the oil level sensor.
A) Check for continuity between the sensor connector terminals in any position.
b) Place the sensor in oil heated to 60°C.
V) Check for continuity between the connector terminals when the sensor is in position "ON" (float raised).
G) Check for continuity between the connector terminals when the sensor is in position "OFF" (float lowered).
d) Replace the sensor if it does not work as specified.
3. Checking the operation of the electronic control unit of the system.
A) Disconnect the connector from the oil level sensor.
b) Ground terminal 1 of the connector on the wire side.
V) Turn on "ignition". Check that the control lamp lights up after 40 seconds.
G) If operation is not as specified, check the control unit circuit.
4. Checking the circuit of the electronic control unit of the system.
A) Disconnect the connectors from the control unit and level sensor.
b) Perform a wire side connector test as shown in the appropriate table.
V) If circuit function is the same as specified, replace the ECU.