Lexus ES: Rear Right Center Sensor Malfunction (C1AE8)
DESCRIPTION
The rear center ultrasonic sensor RH is installed to the rear bumper. The clearance warning ECU assembly detects obstacles based on signals received from the rear center ultrasonic sensor RH. If the rear center ultrasonic sensor RH has an open circuit or other malfunction, it will not function normally.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| C1AE8 | Rear Right Center Sensor Malfunction | A malfunction of the rear center ultrasonic sensor RH. |
|
CAUTION / NOTICE / HINT
NOTICE:
If DTCs are output after repairs, turn the engine switch on (IG) and the parking support alert system on. Then clear the DTCs.
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PROCEDURE
| 1. | CHECK DTC OUTPUT |
(a) Check for DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes| Result | Proceed to |
|---|---|
| Only DTC C1AE8 is output | A |
| DTC C1AE8 and C1AED are output | B |
| No DTCs are output | C |
| B |  | GO TO DTC (C1AED) |
| C | | USE SIMULATION METHOD TO CHECK |
|
| 2. | REPLACE REAR CENTER ULTRASONIC SENSOR RH |
(a) Replace the rear center ultrasonic sensor RH with new or a known good one.
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HINT:
All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.
|
| 3. | CHECK DTC OUTPUT |
(a) Clear the DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs(b) Check for DTCs.
Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes| Result | Proceed to |
|---|---|
| DTC C1AE8 is output | A |
| No DTCs are output | B |
| A | | REPLACE CLEARANCE WARNING ECU ASSEMBLY |
| B | | END (REAR RIGHT CENTER SENSOR WAS DEFECTIVE) |
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: Before replacing the main body ECU (multiplex network body ECU), refer to Registration. Click here HINT:
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed
Inspection
INSPECTION PROCEDURE 1. INSPECT DIRECT FUEL INJECTOR ASSEMBLY NOTICE: This inspection is for checking the direct fuel injector assembly for an open or short. Because the direct fuel injector assembly of this vehicle is a high-pressure type, fuel injection volume cannot be checked. (a) Measure the
