Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000294Z0
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): B2796,B2798; No Communication in Immobiliser System; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

DTC

B2796

No Communication in Immobiliser System

DTC

B2798

Communication Malfunction No. 2

DESCRIPTION

This DTC is stored when a door control transmitter assembly is inserted into the ignition key cylinder but no communication occurs between the door control transmitter assembly and transponder key ECU assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B2796

No Communication in Immobiliser System

The key ID code cannot be transmitted to the transponder key ECU assembly (1 trip detection logic*).

  • Door control transmitter assembly
  • Wire harness or connector

DTC Output Confirmation Operation:

  • Insert the door control transmitter assembly into the ignition key cylinder.

B2798

Communication Malfunction No. 2

Key ID code identification cannot be completed within the specified time (1 trip detection logic*).

  • Door control transmitter assembly
  • Wire harness or connector

DTC Output Confirmation Operation:

  • Insert the door control transmitter assembly into the ignition key cylinder.
  • *: Only output while a malfunction is present.

Vehicle Condition and Fail-safe Operation when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Operation when Malfunction Detected

  • Hybrid control system cannot be started*1
  • Engine cannot be started*2

-

  • *1: for HV Model
  • *2: for Gasoline Model

Related Data List and Active Test

DTC No.

Data List and Active Test

B2796

-

B2798

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the door control transmitter assembly is replaced, refer to Registration.

    Click here 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): REGISTRATION

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (TRANSPONDER KEY ECU ASSEMBLY - TRANSPONDER KEY COIL)

(a) Disconnect the I67 transponder key ECU assembly connector.

(b) Disconnect the I64 transponder key coil connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

I67-2 (ANT1) - I64-1 (ANT1)

Always

Below 1 Ω

I67-3 (ANT2) - I64-5 (ANT2)

Always

Below 1 Ω

I67-2 (ANT1) or I64-1 (ANT1) - Other terminals and body ground

Always

10 kΩ or higher

I67-3 (ANT2) or I64-5 (ANT2) - Other terminals and body ground

Always

10 kΩ or higher

OK

REPLACE DOOR CONTROL TRANSMITTER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR