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Intuitive Parking Assist System (Diagnostic Codes & Circuit Tests): Overview Lexus GS IV

Warning System 5 illustrations ~649 words

DESCRIPTION

The No. 1 ultrasonic sensor (FL sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (FL sensor). If the No. 1 ultrasonic sensor (FL sensor) has an open circuit or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE1A malfunction of the No. 1 ultrasonic sensor (FL sensor).No. 1 ultrasonic sensor (FL sensor) Clearance warning ECU assembly

The No. 1 ultrasonic sensor (FLC sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (FLC sensor). If the No. 1 ultrasonic sensor (FLC sensor) has an open or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE2A malfunction of the No. 1 ultrasonic sensor (FLC sensor).No. 1 ultrasonic sensor (FLC sensor) Clearance warning ECU assembly

The No. 1 ultrasonic sensor (FRC sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (FRC sensor). If the No. 1 ultrasonic sensor (FRC sensor) has an open or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE3A malfunction of the No. 1 ultrasonic sensor (FRC sensor).No. 1 ultrasonic sensor (FRC sensor) Clearance warning ECU assembly

The No. 1 ultrasonic sensor (FR sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (FR sensor). If the No. 1 ultrasonic sensor (FR sensor) has an open circuit or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE4A malfunction of the No. 1 ultrasonic sensor (FR sensor).No. 1 ultrasonic sensor (FR sensor) Clearance warning ECU assembly

The No. 1 ultrasonic sensor (RL sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (RL sensor). If the No. 1 ultrasonic sensor (RL sensor) has an open circuit or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE6A malfunction of the No. 1 ultrasonic sensor (RL sensor).No. 1 ultrasonic sensor (RL sensor) Clearance warning ECU assembly

The No. 1 ultrasonic sensor (RLC sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (RLC sensor). If the No. 1 ultrasonic sensor (RLC sensor) has an open circuit or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE7A malfunction of the No. 1 ultrasonic sensor (RLC sensor).No. 1 ultrasonic sensor (RLC sensor) Clearance warning ECU assembly

The No. 1 ultrasonic sensor (RRC sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (RRC sensor). If the No. 1 ultrasonic sensor (RRC sensor) has an open circuit or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE8A malfunction of the No. 1 ultrasonic sensor (RRC sensor).No. 1 ultrasonic sensor (RRC sensor) Clearance warning ECU assembly

The No. 1 ultrasonic sensor (RR sensor) is installed on the rear bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (RR sensor). If the No. 1 ultrasonic sensor (RR sensor) has an open circuit or other malfunction, it will not function normally.

DTC CodeDTC Detection ConditionTrouble Area
C1AE9A malfunction of the No. 1 ultrasonic sensor (RR sensor).No. 1 ultrasonic sensor (RR sensor) Clearance warning ECU assembly

This DTC is stored when there is an open or short circuit in the communication line between the front sensors and the clearance warning ECU assembly, or when there is a malfunction in a front sensor.

DTC CodeDTC Detection ConditionTrouble Area
C1AECAn open or short circuit in the communication line between the front sensors and ECU or a malfunction in a front sensor during initialization mode after the power switch is turned on (IG).Front ultrasonic sensor circuit Clearance warning ECU assembly Harness or connector

Scheme 39

Scheme 39: WIRING DIAGRAM

This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor.

DTC CodeDTC Detection ConditionTrouble Area
C1AEDAn open or short circuit in the communication line between the rear sensors and ECU or a malfunction in a rear sensor during initialization mode after the power switch is turned on (IG).Rear ultrasonic sensor circuit Clearance warning ECU assembly

Scheme 40

Scheme 40: WIRING DIAGRAM

These DTCs are stored when the clearance warning ECU assembly cannot receive and recognize several signals via the CAN communication system.

DTC CodeDTC Detection ConditionTrouble Area
U0101Lost Communication with TCMCAN communication system
U0155Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)

HINT

When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harnesses of each ECU.

The back sonar or clearance sonar switch assembly is installed at the base of the driver side instrument panel.

When the back sonar or clearance sonar switch assembly is turned on, an ON signal is sent to the clearance warning ECU assembly. The intuitive parking assist system operates according to this signal.

Scheme 41

Scheme 41: WIRING DIAGRAM

This circuit consists of a power source, the No. 1 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The battery voltage supplied through the buzzer is grounded inside the clearance warning ECU assembly using a pulsed digital pattern, producing sound. The ECU operates the buzzer using a sound pattern that changes depending on the distance to the obstacle.

Scheme 42

Scheme 42: WIRING DIAGRAM

This circuit provides power to operate the clearance warning ECU assembly.

Scheme 43

Scheme 43: WIRING DIAGRAM