B2271

2GR-FE STARTING: SMART KEY SYSTEM: B2271: Ignition Hold Monitor Malfunction
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 DTC OUTPUT

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

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.

OK:

No DTC is output.

NG -- INSPECT FUSE (AM2)

OK -- END

2. INSPECT FUSE (AM2)

(a) Remove the AM2 fuse from the engine room J/B.

(b) Measure the resistance of the fuse.

Resistance:

Below 1 Ohms

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

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

(a) Disconnect the D44 ECU connector.





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

Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER SOURCE CONTROL ECU