C1741

DTC C1741 AIR SUS RELAY CIRCUIT

CIRCUIT DESCRIPTION

DTC Detecting Condition:

When the vehicle height starts to rise, a signal is sent from terminal RC of the ECU to switch the height control relay ON. As a result, current flows to the height control relay coil, the contacts in the relay close, and thus battery voltage is applied to the compressor, producing compressed air.

Once the ECU stores DTC C1741/41 in memory, the vehicle height control is not carried out until a normal signal is input to the ECU from the height control relay.

The control is resumed, however, if the ignition switch is turned OFF, then ON again.

Wiring Diagram:

Step 1 - 2:

Step 3 - 4:

Step 5:

INSPECTION PROCEDURE

HINT: Start the inspection from step 1 in case of using the LEXUS hand-held tester and start from step 2 in case of not using the LEXUS hand-held tester.