Dtc B2274 Acc Monitor Malfunction

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Theft Deterrent Keyless Entry. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

CHECK HARNESS AND CONNECTOR (GROUND)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COWL SIDE JUNCTION BLOCK LH)

CHECK COWL SIDE JUNCTION BLOCK LH (ACC RELAY)

INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

DTC B2274 ACC Monitor Malfunction


DESCRIPTION

This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit that goes from the ACC output terminal of the certification ECU (smart key ECU assembly) to the ACC relay.
HINT:
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code
DTC Detection Condition
Trouble Area
DTC Output Confirmation Operation
B2274
Malfunction in the ACC relay circuit in the certification ECU (smart key ECU assembly) or in the external circuit (1-trip detection logic*).
HINT:
When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning.
  1. AM2 fuse
  2. ACC relay (cowl side junction block LH)
  3. Certification ECU (smart key ECU assembly)
  4. Harness or connector
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.
  1. *: Only detected while a malfunction is present.

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected
Fail-safe Function when Malfunction Detected
  1. If there is a malfunction due to the relay being stuck on, the ACC relay does not turn off even though the engine switch is off.
  2. If there is a malfunction due to the relay being stuck off, the ACC relay does not turn on even though the engine switch is on (ACC).
HINT:
The engine switch can be turned on (IG) and the engine can be started.
-

Related Data List and Active Test Items
DTC
Data List Item
Active Test Item
B2274
Power Source Control
  1. ACC Relay Monitor
Starting Control
  1. Ignition
-

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2274 Acc Monitor Malfunction


INSPECTION PROCEDURE

NOTICE:
  1. When using the GTS with the engine 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 the vehicle type under manual mode and enter the following menus:
    Body Electrical / Entry&Start. 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.
  2. The entry and start system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
  3. Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Start Function) precaution (Click here).
  4. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  5. After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
1.CHECK HARNESS AND CONNECTOR (POWER SOURCE)

  1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2274 Acc Monitor Malfunction

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E130-10 (+B) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Certification ECU (smart key ECU assembly))


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


2.CHECK HARNESS AND CONNECTOR (GROUND)

  1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.



    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2274 Acc Monitor Malfunction

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

    Standard Resistance:
    Tester Connection
    		Condition
    		 Specified Condition
    E130-11 (E) - Body ground
    		Always
    		Below 1 Ω
    Text in Illustration
    *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 (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COWL SIDE JUNCTION BLOCK LH)

  1. Disconnect the E130 certification ECU (smart key ECU assembly) connector.

  1. Disconnect the 2J cowl side junction block LH connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E130-9 (ACCD) - 2J-18
    		Always
    		Below 1 Ω
    2J-1 - Body ground
    E130-9 (ACCD) or 2J-18 - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK COWL SIDE JUNCTION BLOCK LH (ACC RELAY)

  1. Remove the cowl side junction block LH.

    1. for LHD: Click here.
    2. for RHD: Click here.


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


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2274 Acc Monitor Malfunction


    Text in Illustration
    *a
    		Component without harness connected
    (Cowl Side Junction Block LH)
    		-
    		-

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    2G-1 - 2I-51
    		Battery voltage not applied to terminals 2J-18 and 2J-1
    		10 kΩ or higher
    Battery voltage applied to terminals 2J-18 and 2J-1
    		Below 1 Ω
Result
Result
Proceed to
OK
A
NG
for LHD
B
for RHD
C


B
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)

C
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)
A


5.INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  1. Reconnect the E130 certification ECU (smart key ECU assembly) connector.

  1. Install the cowl side junction block LH.

    1. for LHD: Click here.
    2. for RHD: Click here.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2274 Acc Monitor Malfunction

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E130-9 (ACCD) - Body ground
    		Engine switch off → Engine switch on (ACC)
    		1 V or less → 8.5 V or higher
    Text in Illustration
    *a
    		Component with harness connected
    (Certification ECU (Smart Key ECU Assembly))


NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK

USE SIMULATION METHOD TO CHECK (Click here)