B2273

4GR-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 there is a problem in the IG2 output circuit, which is from the inside of the power source control ECU to the IG2 relay.

HINT
When the power source control ECU is replaced with a new one and 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.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (AM2)

(a) Remove the AM2 fuse from the cowl side J/B RH.

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

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

2. CHECK CONNECTORS

(a) Check that the connectors are securely connected and the terminals are not deformed or loose.

OK:

The connectors are securely connected and the terminals are not deformed or loose.

NG -- REPAIR OR REPLACE CONNECTORS
OK -- Continue to next step.

3. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND)

(a) Disconnect the J55 ECU connector.

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

Standard voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. INSPECT RELAY (IG2)

(a) Remove the IG2 relay from the engine room R/B No. 2.

(b) Measure the resistance of the relay.

Standard resistance:

NG -- REPLACE FAULTY RELAY OR J/B AND CHECK POWER SOURCE CONTROL ECU
OK -- Continue to next step.

5. CHECK WIRE HARNESS (ENGINE ROOM R/B NO. 2 - POWER SOURCE CONTROL ECU)

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

Standard resistance:

(b) Install the IG2 relay.

NG -- REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR AND CHECK POWER SOURCE CONTROL ECU
OK -- Continue to next step.

6. INSPECT POWER SOURCE CONTROL ECU

(a) Reconnect the J55 ECU connector.

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

Standard voltage:

NG -- REPLACE POWER SOURCE CONTROL ECU
OK -- Continue to next step.

7. RECHECK FOR DTC

(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTCs again.

OK:

DTC B2273 is not output.

NG -- REPLACE POWER SOURCE CONTROL ECU

OK -- CHECK INTERMITTENT PROBLEMS

8. REPLACE FAULTY RELAY OR J/B AND CHECK POWER SOURCE CONTROL ECU

(a) Replace a faulty relay or J/B and then connect the power source control ECU connector.

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

Standard voltage:

NG -- REPLACE POWER SOURCE CONTROL ECU

OK -- END

9. REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR AND CHECK POWER SOURCE CONTROL ECU

(a) Repair or replace a faulty wire harness or connector and then connect the power source control ECU connector.

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

Standard voltage:

NG -- REPLACE POWER SOURCE CONTROL ECU

OK -- END