B2274

2UR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2274: ACC Monitor Malfunction
B2274 - ACC Monitor Malfunction

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 THE TECHSTREAM (ACC RELAY MONITOR)

(a) Use the Data List to check if the ACC relay is functioning properly.

Main Body





OK:

When the power switch is turned ON (IG), ON is displayed on the Techstream screen.

NG -- CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY, BODY GROUND)
OK -- Continue to next step.

2. CHECK POWER SWITCH (SWITCH CONDITION)

(a) Ensure the key is inside the cabin.

(b) 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 SMART ACCESS SYSTEM WITH PUSH-BUTTON START (POWER SOURCE MODE DOES NOT CHANGE) Power Source Mode Does Not Change

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

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





(a) Disconnect the L13, DF and DA main body ECU connectors.

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

Standard voltage:





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU