Dtc B2272 Ignition 1 Monitor Malfunction
Engine. Lexus Gs430, Gs300. Uzs190 Grs190
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - ECU AND BODY GROUND)
CHECK COWL SIDE JUNCTION BLOCK RH (RH-IG1 RELAY)
DTC B2272 Ignition 1 Monitor Malfunction |
DESCRIPTION
This DTC is output when a malfunction is occurring in the IG output circuit, which is from the IG1 relay actuation circuit inside the power source control ECU to the IG1 relay.DTC No.
| DTC Detection Condition
| Trouble Area
|
B2272
| IG1 relay actuation circuit inside power source control ECU or other related circuit is malfunctioning
| - Power source control ECU
- Wire harness
|
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK WIRE HARNESS (COWL SIDE JUNCTION BLOCK RH - ECU AND BODY GROUND) |
Disconnect the DA and DD junction block connectors.
Disconnect the L73 ECU connector.
Measure the resistance of the wire harness side connectors.
- Standard resistance:
Tester Connection
| Specified Condition
|
DD-6 - L73-34 (IG1D)
| Below 1 Ω
|
DA-5 or DD-7 - Body ground
| Below 1 Ω
|
DD-6 or L73-34 (IG1D) - Body ground
| 10 kΩ or higher
|
| | REPAIR OR REPLACE HARNESS AND CONNECTOR |
|
|
| 2.CHECK COWL SIDE JUNCTION BLOCK RH (RH-IG1 RELAY) |
Disconnect the DD and DM junction block connectors.
Measure the resistance of the junction block connectors.
- Standard resistance:
Tester Connection
| Condition
| Specified Condition
|
DM-1 - DD-14
| When battery voltage is not applied to terminals DD-6 and DA-5 or DD-7
| 10 kΩ or higher
|
DM-1 - DD-14
| When battery voltage is applied to terminals DD-6 and DA-5 or DD-7
| Below 1 Ω
|
| | REPLACE COWL SIDE JUNCTION BLOCK RH |
|
|
| OK |
|
|
|
| REPLACE POWER SOURCE CONTROL ECU |
|
