Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Diagnostic Trouble Code Chart

Toyota Corolla Cross (2022-2026) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Immobiliser System (w/o Smart Key System) / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Immobiliser System (w/o Smart Key System)

DTC No.

Detection Item

Link

B2780

Push Switch / Key Unlock Warning Switch Malfunction

B2784

Antenna Coil Open / Short

B2793

Transponder Chip Malfunction

B2794

Unmatched Encryption Code

B2795

Unmatched Key Code

B2796

No Communication in Immobiliser System

B2797

Communication Malfunction No. 1

B2798

Communication Malfunction No. 2

B279986

Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid

B279A12

Engine Immobiliser System Circuit Short to Battery

B279C95

Engine Immobiliser System Incorrect Assembly

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     Push Switch / Key Unlock Warning Switch Malfunction (B2780)

    DESCRIPTION This DTC is stored if the transponder key ECU assembly does not detect that the unlock warning switch assembly is on even when the ignition switch is ON. DTC No. Detection Item

     Antenna Coil Open / Short (B2784)

    DESCRIPTION When an open or short circuit is detected in the antenna coil built into the transponder key coil, the transponder key ECU assembly stores this DTC. DTC No. Detection Item DTC

     Transponder Chip Malfunction (B2793,B2797)

    DESCRIPTION DTC B2793 is stored when a malfunction is found in the door control transmitter assembly during key ID code registration or a key ID code is not registered normally. Replace the door

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     On-vehicle Inspection

    ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT THROTTLE BODY WITH MOTOR ASSEMBLY (a) Before cleaning, or after cleaning the throttle body with motor assembly and installing it to the vehicle, turn the ignition switch to ON without operating the accelerator pedal sensor assembly. NOTICE: If the accel

     Lost Communication with Front Left Air Mix Damper Control Servo Motor LIN Missing Message (B144B87)

    DESCRIPTION The air conditioning harness assembly connects the air conditioning amplifier assembly and the No. 1 air conditioning radiator damper servo sub-assembly. The air conditioning amplifier assembly supplies power and sends operation instructions to No. 1 air conditioning radiator damper serv

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