Dtc B2271 Ignition Hold 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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

DTC B2271 Ignition Hold Monitor Malfunction


DESCRIPTION

This DTC is stored when a malfunction in the IG circuit or IG hold circuit in the certification ECU (smart key ECU assembly) is detected.
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
B2271
When either of the following conditions is met (1-trip detection logic*1):
  1. The IG circuit in the certification ECU (smart key ECU assembly) is malfunctioning.*2
  2. The IG hold circuit in the certification ECU (smart key ECU assembly) is malfunctioning.*3
  1. AM2 fuse
  2. Certification ECU (smart key ECU assembly)
  3. Harness or connector
IG ON
  1. *1: Only detected while a malfunction is present and the engine switch is on (IG).
  2. *2: The IG circuits activate the IG relay.
  3. *3: After the IG circuit turns on, even if the certification ECU (smart key ECU assembly) malfunctions, the IG hold circuit maintains the power source mode in on (IG).

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected
Fail-safe Function when Malfunction Detected
The engine switch cannot be turned on (IG) (the engine cannot be started).
The power source mode cannot be changed to on (IG).

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2271 Ignition Hold Monitor Malfunction


Land Cruiser. Urj200, 202 Grj200 Vdj200.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function). Dtc B2271 Ignition Hold 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.

HINT:

Related Data List and Active Test Items
DTC
Data List Item
Active Test Item
B2271
Power Source Control
  1. IG Relay Monitor (Inside)
  2. Latch Circuit
Starting Control
  1. Ignition
-
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 B2271 Ignition Hold 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 B2271 Ignition Hold 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 CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  1. Reconnect 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 B2271 Ignition Hold Monitor Malfunction

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E128-3 (IG1D) - Body ground
    		Engine switch on (ACC) → Engine switch on (IG)
    		1 V or less → 9 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)