Dtc B2274 Acc Monitor Malfunction

Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

CHECK FOR DTC

INSPECT RELAY (ACC RELAY)

CHECK HARNESS AND CONNECTOR (ACC RELAY - MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

CHECK HARNESS AND CONNECTOR (ACC RELAY - BATTERY AND BODY GROUND)

DTC B2274 ACC Monitor Malfunction


DESCRIPTION

This DTC is output when there is a problem in the ACCD output circuit, which is from the inside of the main body ECU (instrument panel junction block) to the ACC relay.
HINT:
When the main body ECU (instrument panel junction block) is replaced with a new one and the cable from the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
After the main body ECU (instrument panel junction block) is replaced, perform the registration procedures for the engine immobiliser system (COROLLA_ZRE142 RM000000QYF05AX.html).

DTC No.
DTC Detection Condition
Trouble Area
B2274
ACC relay actuation circuit inside main body ECU (instrument panel junction block) or other related circuit is malfunctioning
  1. Main body ECU (instrument panel junction block)
  2. ACC relay
  3. Wire harness or connector

WIRING DIAGRAM


Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2274 Acc Monitor Malfunction


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

  1. Turn the engine switch on (IG) and turn the Techstream on.

  1. Read the Data List according to the displays on the Techstream.

    HINT:
    When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    ACC Relay Monitor
    		Status of ACC Relay Monitor / ON or OFF
    		ON: Engine switch on (ACC)
    OFF: Engine switch off
    		-
    OK:
    "ON" (engine switch on (ACC)) appears on the screen.


NG
Go to step 3
OK


2.CHECK FOR DTC

  1. Clear the DTC (COROLLA_ZRE142 RM000000YEH0CGX.html).

  1. Turn the engine switch on (IG).

  1. After 10 seconds have elapsed, check if the trouble occurs again.

    OK:
    DTC B2273 is not output.


NG
REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
OK

USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000UZ108OX.html)

3.INSPECT RELAY (ACC RELAY)


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2274 Acc Monitor Malfunction

  1. Remove the ACC relay from the relay block No. 8.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		When battery voltage is not applied to terminals 1 and 2
    		10 kΩ or higher
    3 - 5
    		When battery voltage is applied to terminals 1 and 2
    		Below 1 Ω


NG
REPLACE ACC RELAY
OK


4.CHECK HARNESS AND CONNECTOR (ACC RELAY - MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)


  1. Disconnect the E50 connector.


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key 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
    Relay block No. 8 ACC relay terminal 1 - E50-4 (ACCD)
    		Always
    		Below 1 Ω
    Relay block No. 8 ACC relay terminal 1 or E50-4 (ACCD) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ACC RELAY - MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
OK


5.CHECK HARNESS AND CONNECTOR (ACC RELAY - BATTERY AND BODY GROUND)


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key 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
    Relay block No. 8 ACC relay terminal 2 - Body ground
    		Always
    		Below 1 Ω

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

Standard Voltage:
Tester Connection
Condition
Specified Condition
Relay block No. 8 ACC relay terminal 3 - Body ground
Always
11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ACC RELAY - BATTERY AND BODY GROUND)
OK

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)