Dtc B2273 Ignition 2 Monitor Malfunction
Engine. Lexus Gs430, Gs300. Uzs190 Grs190
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT RELAY (Marking: IG2)
CHECK WIRE HARNESS (ENGINE ROOM NO. 2 RELAY BLOCK - POWER SOURCE CONTROL ECU)
DTC B2273 Ignition 2 Monitor Malfunction |
DESCRIPTION
This DTC is output when a malfunction is occurring in the IG output circuit, which is from the IG2 relay actuation circuit inside the power source control ECU to the IG2 relay.DTC No.
| DTC Detection Condition
| Trouble Area
|
B2273
| IG2 relay actuation circuit inside power source control ECU or other related circuit is malfunctioning
| - Power source control ECU
- IG2 relay
- Wire harness
|
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.INSPECT RELAY (Marking: IG2) |
Remove the IG2 relay from the engine room No. 2 relay block.
Measure the resistance of the relay.
- Standard resistance:
Tester Connection
| Specified Condition
|
3 - 5
| 10 kΩ or higher
|
3 - 5
| Below 1 Ω
(when battery voltage is applied to terminals 1 and 2)
|
| 2.CHECK WIRE HARNESS (ENGINE ROOM NO. 2 RELAY BLOCK - POWER SOURCE CONTROL ECU) |
Remove the IG2 relay from the engine room relay block No. 2.
Disconnect the L73 ECU connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
Engine room relay block No. 2 IG2 relay terminal 2 - L73-35 (IG2D)
| Below 1 Ω
|
Engine room relay block No. 2 IG2 relay terminal 1 - Body ground
| Below 1 Ω
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
| OK |
|
|
|
| REPLACE POWER SOURCE CONTROL ECU |
|
