B2271

1NZ-FXE STARTING: SMART KEY SYSTEM: B2271: Ignition Hold Monitor Malfunction

DTC B2271 - Ignition Hold Monitor Malfunction

DESCRIPTION

This DTC is output when the IG output circuits inside the power source control ECU are open or short.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTC
(a) Delete the DTC Reading and Clearing Diagnostic Trouble Codes.
(b) Check for DTCs again.
OK:
No DTC is output.
OK -- END
NG -- Continue to next step.

2. INSPECT FUSE (AM2)
(a) Remove the AM2 fuse from the engine room junction block.
(b) Measure the resistance of the fuses.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.

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




(a) Disconnect the P6 ECU connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE POWER SOURCE CONTROL ECU