Main Body Ecu; Wire Harness Or Connector - Toyota 2GR-FE Manual

DTC B2271
DESCRIPTION
This DTC is output when a problem such as an open in the AM2 fuse, an open or short in the wire harness
between the fuse and main body ECU, a short in the IG output circuit inside the main body ECU, a short
between the main body ECU and relay, and a short in the relay is detected.
HINT:
When the main body 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.
After the main body ECU is replaced, perform the registration procedures for the engine immobiliser
system (See page EI-8).
DTC No.
Hold circuit, IG1 relay actuation circuit or IG2 relay
B2271 actuation circuit inside main body ECU is open or
shorted
WIRING DIAGRAM
FL MAIN
Battery
INSPECTION PROCEDURE
1
CHECK DTC OUTPUT
2GR-FE STARTING – SMART KEY SYSTEM
Ignition Hold Monitor Malfunction
DTC Detection Condition
Engine Room J/B and R/B
AM2
1
1G 1
(a) Delete the DTCs (See page ST-26).
HINT:
After all DTCs are cleared, check if the trouble occurs
again 6 seconds after the engine switch is turned on
(IG).
(b) Check for DTCs again.
Trouble Area
• AM2 fuse
•

Main body ECU

•

Wire harness or connector

Main Body ECU
6
E7 AM1
1
E6
AM2
ST–33
B137971E01
ST