Keyless Start Control Module Self-Diagnosis Function

Keyless Start Control Module Self-Diagnosis Function

Description

Keyless start control module monitors conditions of the system components and its circuit. When an abnormality in the system occurs, keyless start control module controls as follows.

Self-Diagnosis Function

Keyless start control module is equipped with self-diagnosis function that stores DTC for abnormalities detected in keyless start system, immobilizer control system and power window system. Stored DTC is saved until abnormality is corrected.

Warning Function

- When a malfunction of keyless start system and immobilizer control system is detected, keyless start control module makes theft deterrent light or immobilizer indicator light turn on. And, depending on the malfunction, a message is shown in information display to warn the driver.

NOTE:
- When DTC B1194 is detected, immobilizer indicator light stays on until normal condition is judged at least twice in a row.
- Warning function is not shown when a malfunction of the power window system is detected.

- After detecting a malfunction, theft deterrent light and immobilizer indicator light are turned on. However they are turned off when normal condition is judged.
- Refer to the following for details on operation of theft deterrent light and immobilizer indicator light through the warning function.

- Immobilizer control system: Immobilizer Control System
- Keyless start system: Keyless Start System

Fail-Safe Control

Keyless start control module operates fail-safe control when an abnormality related to keyless start system is detected and stops all control in order to protect system. Details of fail-safe control vary depending on the detected DTC. Initial Inspection and Diagnostic Overview

NOTE:

When a malfunction of power window system and immobilizer control system is detected, keyless start control module does not perform fail-safe control. However, in power window system, each power window switch separately performs fail-safe control to stop AUTO mode. Power Window System Fail-Safe Function (Front Doors Only)