A key code confirmation signal (ON or OFF) is sent from the power source control ECU to the multiplex tilt & telescopic ECU via the communication bus.

The multiplex tilt & telescopic ECU uses this signal to operate the auto away/return function.

If a DTC is displayed, check the circuit for that code listed in the table below.

Connect the intelligent tester to the DLC3.

○: Operate

X: Not operate

*1: with Seat position memory

Connect the intelligent tester to the DLC3.

Prepare the intelligent tester.

When troubleshooting a vehicle with the diagnostic system, the only difference from the usual troubleshooting procedure is connecting the intelligent tester to the vehicle and reading various data output from the vehicle's multiplex tilt & telescopic ECU.

The multiplex tilt & telescopic ECU records DTCs when the ECU detects a malfunction in the computer itself or in its circuits.

Lexus IS250 IS220d GSE20 ALE20 STEERING COLUMN

The power tilt & power telescopic steering column system uses the multiplex communication system, so check its diagnostic system before proceeding to troubleshooting. The table below will be useful in troubleshooting these electrical systems. The numbered suspected areas indicate the likelihood of the cause in descending order. Inspect each part in the order shown, and replace if a fault is found.

The power tilt & power telescopic steering column system uses the multiplex communication system, so check its diagnostic system beforeproceeding to troubleshooting. The table below will be useful in troubleshooting these electrical systems. The numbered suspected areas indicate the likelihood of the cause in descending order. Inspect each part in the order shown, andreplace if a fault is found.