Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001KP1K
Model Year Start: 2020 Model: Camry Prod Date Range: [09/2019 - 08/2021]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): DIAGNOSTIC TROUBLE CODE CHART; 2020 - 2021 MY Camry [09/2019 - 08/2021]

DIAGNOSTIC TROUBLE CODE CHART

Smart Key System (for Start Function)

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Memory

DTC Output from

Test Mode / Check Mode

Return-to-normal Condition

Fail-safe Operation

Note

Link

B2271

Ignition Hold Monitor Malfunction

  

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)
  • Instrument panel junction block assembly
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Turn the engine switch on (IG).

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2271; Ignition Hold Monitor Malfunction

B2274

ACC Monitor Malfunction

  

The ACC relay circuit of the certification ECU (smart key ECU assembly) is malfunctioning. (1-trip detection logic*)

HINT:

When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning.
  • Instrument panel junction block assembly
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Wait 10 seconds after turning the engine switch on (ACC) or on (IG), and then wait another 10 seconds after turning the engine switch off.

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2274; ACC Monitor Malfunction

B2277

Detecting Vehicle Submersion

  

Water submersion detected by the water submersion detection circuit inside the certification ECU (smart key ECU assembly). (1-trip detection logic*)

Certification ECU (smart key ECU assembly)

              

DTC Output Confirmation Operation:

  • Wait 300 seconds after connecting the cable to the negative (-) battery terminal.

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2277; Detecting Vehicle Submersion

B2278

Engine/Power Switch Malfunction

  

When the engine switch is operated, the SSW1 contact signal and SSW2 contact signal do not match (1-trip detection logic*).
  • Engine switch
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Turn the engine switch on (IG).

2018 - 2024 MY Camry [06/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2278; Engine/Power Switch Malfunction

B2282

Vehicle Speed Signal Malfunction

  

The vehicle speed signal sent by the combination meter assembly via direct line and the vehicle speed signal sent via CAN communication do not match. (1-trip detection logic*)
  • Meter/gauge system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Drive the vehicle at a vehicle speed of 25 km/h (16 mph) or more for 20 seconds, and then drive the vehicle at a vehicle speed of less than 5 km/h (3 mph) for 20 seconds.

2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2282,B2283; Vehicle Speed Signal Malfunction

B2283

Vehicle Speed Sensor Malfunction

  

Either of the of the following malfunctions is detected (a vehicle speed sensor malfunction is detected) (1-trip detection logic*):

  • Vehicle speed signal malfunction detection 1: Excessive deceleration is detected
  • Vehicle speed signal malfunction detection 2: Engine speed linked malfunction detected
  • Meter/gauge system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Run the engine at an engine speed of 2000 rpm or more for 300 seconds.
  • Drive the vehicle at a vehicle speed of 50 km/h (31 mph) or more for 10 seconds, and then drive the vehicle at a vehicle speed of less than 50 km/h (31 mph).

2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2282,B2283; Vehicle Speed Signal Malfunction

B2284

Brake Signal Malfunction

  

The brake signal sent via direct line and the brake signal sent via CAN communication do not match. (1-trip detection logic*)
  • Stop light switch assembly
  • SFI system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Connect the cable to the negative (-) battery terminal, release the brake pedal and wait at least 20 seconds. Then depress the brake pedal for 20 seconds or more.

2018 - 2021 MY Camry [06/2017 - 08/2021]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2284; Brake Signal Malfunction

B2285

Steering Lock Position Signal Circuit Malfunction

  

The steering lock position signal sent by the steering lock ECU (steering lock actuator or upper bracket assembly) via direct line and the steering lock position signal sent via LIN communication do not match. (1-trip detection logic*1)
  • LIN communication system
  • Steering lock ECU (steering lock actuator or upper bracket assembly)
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
  • DCM (telematics transceiver)*2
             

DTC Output Confirmation Operation:

  • Disconnect the cable from the negative (-) battery terminal, wait 30 seconds and then reconnect the cable to the negative (-) battery terminal. Wait at least 40 seconds with the engine switch off (wait is the steering locked), then turn the engine switch on (IG) (steering unlocked) and wait at least 40 seconds.

2020 - 2022 MY Camry [09/2019 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2285; Steering Lock Position Signal Circuit Malfunction

B2286

Runnable Signal Malfunction

  

The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match. (1-trip detection logic*)
  • SFI system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Disconnect the cable from the negative (-) battery terminal, wait 30 seconds and reconnect the cable to the negative (-) battery terminal. Wait 20 seconds or more with the engine switch off, then start the engine and maintain an engine speed of 1000 rpm or more for 20 seconds or more.

2018 - 2022 MY Camry [06/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2286,P0335; Runnable Signal Malfunction

B228B

System Voltage or GND Energization Malfunction

  

A malfunction is detected in the certification ECU (smart key ECU assembly) battery power supply circuit or ground circuit. (1-trip detection logic*)
  • AM2 fuse
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Drive the vehicle.

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B228B; System Voltage or GND Energization Malfunction

B2779

Engine Starter Communication Malfunction

  

One of the following conditions is met (1 trip detection logic*):

  • A remote start communication error occurs.
  • Response is not possible.
  • Registration has not been performed.
  • CAN communication system
  • Remote engine start ECU
  • Certification ECU (smart key ECU assembly)
             

DTC output confirmation operation:

  • A remote start operation is performed.

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2779; Engine Starter Communication Malfunction

B2781

Open / Short in Steering Lock ECU

  

One of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):

  • The steering lock sensor or unlock sensor is malfunctioning (When both detection switches turn on, the system is determined to be malfunctioning).
  • The steering lock motor activation circuit has a short circuit.
  • The steering lock motor activation circuit has an open circuit.
  • Steering lock ECU (steering lock actuator or upper bracket assembly)
  • LIN communication system
             

DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

2018 - 2022 MY Camry [03/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2781; Open / Short in Steering Lock ECU

B2782

Power Source Control ECU Malfunction

  

Either of the following conditions is met (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).)):

  • The steering lock motor activation command circuit has a short circuit.
  • The steering lock motor activation command circuit has an open circuit.

HINT:

If the power supply signal from the LIN communication line does not match the power supply signal from the direct line, the system is determined to be malfunctioning.
  • Steering lock ECU (steering lock actuator or upper bracket assembly)
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation: Perform a steering lock/unlock operation. (The steering locks when a door is opened with the shift lever in P and the engine switch off. The steering unlocks when the engine switch is turned on (ACC) or on (IG) while carrying the key.)

2018 - 2022 MY Camry [03/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2782; Power Source Control ECU Malfunction

B2784

Antenna Coil Open / Short

  

The transponder key amplifier coil built into the engine switch is open (see below) or shorted (determined by communication with certification ECU (smart key ECU assembly)). (1 trip detection logic*)
  • Engine switch
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC output confirmation operation:

  • With the shift lever in P and the electrical key transmitter sub-assembly held near the engine switch, an engine start operation is performed by pressing and holding the engine switch when the transmitter battery is depleted.

2018 - 2024 MY Camry [06/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2784; Antenna Coil Open / Short

B2788

IG2 Signal Malfunction

  

Mismatch between the steering lock ECU (steering lock actuator or upper bracket assembly) IG2 input from the LIN communication system and from the direct line. (1-trip detection logic (Only output while a malfunction is present and the engine switch is on (IG).))
  • Steering lock ECU (steering lock actuator or upper bracket assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation: No confirmation operation is necessary (monitoring is continuous).

2018 - 2022 MY Camry [03/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2788; IG2 Signal Malfunction

B278A

Short to GND in Immobiliser System Power Source Circuit

  

A short to GND in the power supply of the transponder key amplifier of the engine switch (VC5 - VC5) detected. (1 trip detection logic*)
  • Engine switch
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC output confirmation operation:

  • With the shift lever in P and the electrical key transmitter sub-assembly held near the engine switch, an engine start operation is performed by pressing and holding the engine switch when the transmitter battery is depleted.

2018 - 2024 MY Camry [06/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B278A; Short to GND in Immobiliser System Power Source Circuit

B278D

Malfunction of ID-BOX Recognition

  

One of the following conditions is met:

  • The certification ECU (smart key ECU assembly) recognizes that the wire harness judging whether the vehicle is equipped with an ID code box or not is provided even though the ID code box is not registered.
  • The certification ECU (smart key ECU assembly) receives a LIN signal from the ID code box even though the ID code box is not registered.
  • The certification ECU (smart key ECU assembly) receives a LIN signal from the ID code box even though the wire harness judging whether the vehicle is equipped with an ID code box or not is not provided.

Misconnection of the ID code box

              

DTC output confirmation operation:

  • Always

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B278D; Malfunction of ID-BOX Recognition

B279986

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

  

Either of the following conditions is met (1 trip detection logic*):

  • A malfunction is detected in the communication or communication lines between the ECM and certification ECU (smart key ECU assembly).
  • The communication ID codes of the ECM and certification ECU (smart key ECU assembly) do not match.
  • Certification ECU (smart key ECU assembly)
  • ECM
  • Wire harness or connector
             

DTC output confirmation operation (Perform either of the following):

  • Start the engine and wait for 10 seconds. If there is a malfunction, the engine will stop (communication begins within 3 seconds of the engine start operation being performed, and DTCs are stored after 6 seconds).
  • Connect the cable to the negative (-) battery terminal, start the engine and wait for 10 seconds (communication begins within 3 seconds of the engine switch being turned on (IG), and DTCs are stored after 6 seconds).

2018 - 2022 MY Camry [06/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B279986; Engine Immobiliser System Signal (Some Circuit Quantity, Reported via Serial Data) Invalid

B279A12

Engine Immobiliser System Circuit Short to Battery

  

The communication line (IMI - EFIO) between the ECM and certification ECU (smart key ECU assembly) is stuck high. (1 trip detection logic*)
  • Certification ECU (smart key ECU assembly)
  • ECM
  • Wire harness or connector
             

DTC output confirmation operation:

  • Turn the engine switch on (IG) and wait 6 seconds.

2018 - 2022 MY Camry [06/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B279A12; Engine Immobiliser System Circuit Short to Battery

B279C95

Engine Immobiliser System Incorrect Assembly

  

An ECM that is incompatible with the immobiliser function is installed. (1-trip detection logic*)

ECM

              

-

2018 - 2024 MY Camry [06/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B279C95; Engine Immobiliser System Incorrect Assembly

B27A5

Open in Front Floor Electrical Key Oscillator Circuit

  

An open is detected in the circuit between the certification ECU (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (front floor) (CLG5 - ANTE5, CG5B - CLGB) (1 trip detection logic*).
  • Certification ECU (smart key ECU assembly)
  • No. 1 indoor electrical key antenna assembly (front floor)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Any time

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B27A5; Open in Front Floor Electrical Key Oscillator Circuit

B27A6

Open in Rear Floor Electrical Key Oscillator Circuit

  

An open is detected in the circuit between the certification ECU (smart key ECU assembly) and No. 1 indoor electrical key antenna assembly (rear floor) (CLG6 - ANTE6, CG6B - CLGB) (1 trip detection logic*).
  • Certification ECU (smart key ECU assembly)
  • No. 1 indoor electrical key antenna assembly (rear floor)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Any time

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B27A6; Open in Rear Floor Electrical Key Oscillator Circuit

P0335

Crankshaft Position Sensor Circuit Malfunction (NE Signal)

  

The engine speed signal sent by the ECM via direct line and the engine speed signal sent via CAN communication do not match. (1-trip detection logic*)
  • SFI system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
             

DTC Output Confirmation Operation:

  • Allow the engine to idle for 10 seconds or more.

2018 - 2022 MY Camry [06/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2286,P0335; Runnable Signal Malfunction

U0100

Lost Communication with ECM / PCM

  

CAN communication malfunction between certification ECU (smart key ECU assembly) and ECM (1-trip detection logic*)

ECM

              

DTC Output Confirmation Operation:

  • Turn the engine switch on (IG) and wait at least 10 seconds.

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): U0100,U0140,U0142,U0155,U1117; Lost Communication with ECM / PCM

U0140

Lost Communication with Main Body ECU

  

CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*)

Main body ECU (multiplex network body ECU)

              

DTC Output Confirmation Operation:

  • Always

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): U0100,U0140,U0142,U0155,U1117; Lost Communication with ECM / PCM

U0142

Lost Communication with Main Body ECU

  

CAN communication malfunction between certification ECU (smart key ECU assembly) and main body ECU (multiplex network body ECU) (1-trip detection logic*)

Main body ECU (multiplex network body ECU)

              

DTC Output Confirmation Operation:

  • Always

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): U0100,U0140,U0142,U0155,U1117; Lost Communication with ECM / PCM

U0155

Lost Communication with Combination Meter

  

CAN communication malfunction between certification ECU (smart key ECU assembly) and combination meter assembly (1-trip detection logic*)

Combination meter assembly

              

DTC Output Confirmation Operation:

  • Turn the engine switch on (IG) and wait at least 10 seconds.

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): U0100,U0140,U0142,U0155,U1117; Lost Communication with ECM / PCM

U1117

Lost Communication with Accessory Gateway

  

Data from the option connector (bus buffer ECU) cannot be received
  • Connector and branch wire of sub bus 2 of option connector (bus buffer ECU)
  • Internal malfunction of option connector (bus buffer ECU)
             

DTC Output Confirmation Operation:

  • Turn the engine switch on (IG) and wait at least 10 seconds.

2018 - 2024 MY Camry [03/2017 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): U0100,U0140,U0142,U0155,U1117; Lost Communication with ECM / PCM