Toyota Avalon Service & Repair Manual: ECU Malfunction (C1611)

DESCRIPTION

If the clearance warning ECU assembly detects an internal malfunction during self-diagnosis, DTC C1611 is stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1611

ECU Malfunction

  • Sub-CPU abnormal signal
  • Mirror check abnormal

Clearance warning ECU assembly

CAUTION / NOTICE / HINT

NOTICE:

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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  • After replacing an ultrasonic sensor or the clearance warning ECU assembly, perform the necessary procedures (adjustment, calibration, initialization or registration).

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PROCEDURE

1.

CHECK DTC OUTPUT

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

HINT:

After turning the engine switch from off to on (IG), wait 3 seconds or more before checking for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

(b) Clear the DTCs according to the screen on the Techstream.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs

(c) Recheck for DTCs.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

Result

Proceed to

DTC C1611 is output

A

DTC C1611 is not output

B

A

REPLACE CLEARANCE WARNING ECU ASSEMBLY

B

USE SIMULATION METHOD TO CHECK

    Vehicle Information Unmatched (C168D)

    Open or Short in Steering Angle Sensor +B (C1625)

    See More:

    Toyota Avalon Service & Repair Manual > Electronically Controlled Brake System(for Hv Model): Open or Short in Rear Speed Sensor RH Circuit (C1407,C1408)
    DESCRIPTION Refer to DTCs C1415 and C1416. Click here DTC No. Detection Item INF Code DTC Detection Condition Trouble Area MIL Note C1407 Open or Short in Rear Speed Sensor RH Circuit 523 526 528 INF Code: 523 An open in the speed sensor signal circuit continues for 0.5 seconds or more. INF Code: 52 ...

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