Interview the customer to confirm the trouble .

The wireless door lock control system functions to lock and unlock all the doors from a distance. The system is controlled by a hand-held transmitter which sends radio waves to the door control receiver. The main body ECU RH performs an ID code identification process and engages the door lock control.

Lexus IS250 IS220d GSE20 ALE20 DOOR LOCK

Lexus IS250 IS220d GSE20 ALE20 DOOR LOCK

While using the battery during inspection, do not bring the positive and negative tester probes too close to each other as a short circuit may occur.

This circuit supplies power to operate the double door lock ECU (door opening relay).

When the lock side of the door control switch is pressed, continuity is established between terminals 3 and 2 of the switch. When the unlock side of the switch is pressed, continuity is established between terminals 1 and 2.

Terminals L1 and UL1 of the main body ECU RH are connected to the door control switch and door lock/unlock request signals (by door control switch operation) are input to the ECU.

The driver's door key lock and unlock switch is built into the driver's door lock assembly.

When the driver's door key cylinder is turned to lock all the doors by key, there is continuity between terminals L and E of the key lock and unlock switch. When the cylinder is turned to unlock the door(s), there is continuity between terminals UL and E.

The rear right side door double lock motor is built into the rear right side door lock assembly.

The double door lock ECU receives rear right side door double door lock set/release signals from the main body ECU RH using multiplex communication.

The rear left side door double lock motor is built into the rear left side door lock assembly.

The double door lock ECU receives rear left side door double door lock set/release signals from the main body ECU RH using multiplex communication.