ENTRY AND START SYSTEM, Diagnostic DTC:B2274

DESCRIPTION

This DTC is output when a malfunction occurs in the ACCD output circuit, which is between the D-ACC relay actuation circuit inside the main body ECU and the D-ACC relay.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER (ACC RELAY MONITOR)

   
   

   1. Use the Data List to check if the ACC relay is functioning properly.

      Main Body

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      ACC Relay Monitor	D-ACC relay monitor/ON or OFF	ON: Power switch ON (IG) OFF: Power switch OFF	-

      OK
      When the power switch is turned ON (IG), ON is displayed on the tester.

   
   

   NG

   CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY, BODY GROUND) Click here

   OK

2. CHECK POWER SWITCH (SWITCH CONDITION)

   
   

   1. Ensure the key is inside the cabin.

   2. With the brake pedal released, check that the power source mode changes as shown below each time the power switch is pushed.

      OK
      OFF → ON (ACC) → ON (IG) → OFF

   
   

   NG

   GO TO ENTRY AND START SYSTEM (POWER SOURCE MODE DOES NOT CHANGE) Click here

   OK

   USE SIMULATION METHOD TO CHECK Click here

3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY, BODY GROUND)

   

   
   

   1. Disconnect the L13, DF and DA main body ECU connectors.

   2. Measure the voltage and resistance according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition DF-1 - Body ground Always 11 to 14 V

      Standard resistance
      Tester Connection Condition Specified Condition L13-22 (ACCD) - DA-19 Always Below 1 Ω DA-40 (GND1) - Body ground Always Below 1 Ω L13-22 (ACCD) or DA-19 - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE MAIN BODY ECU