B2273

2UR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2273: Ignition 2 Monitor Malfunction
B2273 - Ignition 2 Monitor Malfunction

DESCRIPTION

This DTC is output when a malfunction occurs in the IG2D output circuit, which is between the ignition relay No. 2 (IG2) actuation circuit inside the main body ECU and the ignition relay No. 2 (IG2).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING THE TECHSTREAM (IG2 RELAY MONITOR (INSIDE))

(a) Use the Data List to check if the ignition relay No. 2 (IG2) is functioning properly.

Main Body





OK:

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

NG -- INSPECT IGNITION RELAY NO. 2 (IG2)
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. INSPECT IGNITION RELAY NO. 2 (IG2)





(a) Remove the ignition relay No. 2 (IG2) from the engine room No. 2 junction block.

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

Standard resistance:





NG -- REPLACE RELAY
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - IGNITION RELAY NO. 2 (IG2), BODY GROUND)





(a) Disconnect the L12 main body ECU connector.

(b) Remove the ignition relay No. 2 (IG2) from the engine room No. 2 junction block.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU