B2273

1UR-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 IG2 relay actuation circuit inside the main body ECU and the IG2 relay.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

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

(a) Use the Data List to check if the IG2 relay is functioning properly.

Main Body





OK:

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

NG -- INSPECT IGNITION RELAY NO.2 (IG2)
OK -- Continue to next step.

2. CHECK ENGINE SWITCH (SWITCH CONDITION)

(a) Ensure the key is inside the cabin.

(b) Check that the power source mode changes as shown below each time the engine switch is pushed.

OK:

off -> on (ACC) -> on (IG) -> off

NG -- GO TO POWER SOURCE MODE DOES NOT CHANGE Power Source Mode does not Change

OK -- NORMAL

3. INSPECT IGNITION RELAY NO.2 (IG2)

(a) Remove the IG2 relay 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 IGNITION RELAY NO.2 (IG2)
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (IG2 RELAY - MAIN BODY ECU AND BODY GROUND)





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

(b) Disconnect the L12 main body ECU connector.

(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