Toyota Avalon Service & Repair Manual: ENG / EHV Device (C1A40)

DESCRIPTION

When a EFI system malfunction signal sent by the ECM is detected by the clearance warning ECU assembly, DTC C1A40 is stored.

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.

  Click here

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

  Click here

PROCEDURE

(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 4 seconds or more before checking for DTCs.

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

(c) Recheck for DTCs.

HINT:

• DTC C1A40 is stored when a malfunction signal sent from the EFI system is detected.
• If the malfunctioning part has been repaired or replaced before rechecking for DTCs, DTC C1A40 will not be output again.
• If DTC C1A40 is output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.

  Click here

A

GO TO EFI SYSTEM

B

USE SIMULATION METHOD TO CHECK