Last Modified: 07-31-2024 6.11:8.1.0 Doc ID: RM1000000026XC6
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): B227111; IG Circuit Short to Ground; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

DTC

B227111

IG Circuit Short to Ground

DESCRIPTION

This DTC is stored when a malfunction in the IG drive circuit or IG hold circuit of the certification ECU (smart key ECU assembly) or a malfunction in the IG output circuit between the output terminal of the certification ECU (smart key ECU assembly) and IG relay is detected.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

B227111

IG Circuit Short to Ground

When either of the following conditions is met (1-trip detection logic*1):

  • The IG circuit of the certification ECU (smart key ECU assembly) is malfunctioning.*2
  • The IG hold circuit of the certification ECU (smart key ECU assembly) is malfunctioning.*3
  • There is a malfunction in a circuit outside of the certification ECU (smart key ECU assembly) circuit
  • Certification ECU (smart key ECU assembly)
  • Power distribution box assembly
  • Wire harness or connector

DTC Output Confirmation Operation:

  • Turn the ignition switch to ON.
  • *1: Only detected while a malfunction is present and the ignition switch is ON.
  • *2: The IG circuit and IG hold circuit activate the IG relay.
  • *3: After the IG circuit turns on, even if the certification ECU (smart key ECU assembly) malfunctions, the IG hold circuit will maintain the power source mode in ON.

Vehicle Condition and Fail-safe Function when Malfunction Detected

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected

The ignition switch cannot be turned to ON (the hybrid control system cannot be started).

The power source mode cannot be changed to ON.

Related Data List and Active Test Items

DTC No.

Data List and Active Test

B227111

Power Source Control

  • IGP Relay Circuit (Outside) Monitor
  • IGR Relay Circuit (Outside) Monitor

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When using the GTS with the ignition switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins.

    Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Start Key(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here 2023 MY Corolla Corolla HV [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING 2023 - 2025 MY Corolla Corolla HV [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): HOW TO PROCEED WITH TROUBLESHOOTING

  • Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

    Click here 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

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

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

(a) Disconnect the I167 certification ECU (smart key ECU assembly) connector.

*a

Front view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly))

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

I167-6 (+B) - Body ground

Ignition switch off

11 to 14 V
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE
OK

2.

CHECK HARNESS AND CONNECTOR (GROUND)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I167-29 (E) - Body ground

Always

Below 1 Ω

*a

Front view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly))
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) AND BODY GROUND)

(a) Disconnect the O175 certification ECU (smart key ECU assembly) connector.

(b) Disconnect the 8D power distribution box assembly connectors.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8D-16 - O175-24 (IGPD)

Always

Below 1 Ω

8D-17 - O175-11 (IGRD)

Always

Below 1 Ω

8D-16 or O175-24 (IGPD) - Other terminals and body ground

Always

10 kΩ or higher

8D-17 or O175-11 (IGRD) - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK POWER DISTRIBUTION BOX ASSEMBLY

(a) Disconnect the 8D power distribution box assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8D-16 - 8F-11

Always

Below 1 Ω

8D-16 or 8F-11 - Other terminals

Always

10 kΩ or higher
NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

OK

5.

CHECK HARNESS AND CONNECTOR (POWER DISTRIBUTION BOX ASSEMBLY - IGP RELAY)

(a) Remove the IGP-MAIN relay from the No. 1 engine room relay block and No. 1 junction block assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8F-11 - No. 1 engine room relay block and No. 1 junction block assembly IGP-MAIN relay terminal 1

Always

Below 1 Ω

8F-11 or No. 1 engine room relay block and No. 1 junction block assembly IGP-MAIN relay terminal 1 - Other terminals and body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

6.

INSPECT IGP RELAY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

3 - 5

Auxiliary battery voltage applied between terminals 1 and 2

Below 1 Ω

Auxiliary battery voltage not applied between terminals 1 and 2

10 kΩ or higher

*1

IGP-MAIN Relay
NG

REPLACE IGP RELAY
OK

7.

CHECK POWER DISTRIBUTION BOX ASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

8D-17 - 8A-8

Always

20 Ω or higher

8D-17 - 8D-8

Always

20 Ω or higher

8D-17 or 8A-8 - Other terminals

Always

10 kΩ or higher

8D-17 or 8D-8 - Other terminals

Always

10 kΩ or higher
OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: CERTIFICATION ECU: REMOVAL

NG

REPLACE POWER DISTRIBUTION BOX ASSEMBLY 2023 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 - 11/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL