B2271

2AR-FE STARTING: SMART KEY SYSTEM: B2271: Ignition Hold Monitor Malfunction
B2271 - Ignition Hold Monitor Malfunction

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 Engine Immobiliser System (W/ Smart Key System).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT

(a) Delete the DTCs 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 -- CHECK INTERMITTENT PROBLEMS

2. INSPECT FUSE (AM2)

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

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

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

3. CHECK WIRE HARNESS (MAIN BODY ECU - BATTERY)

(a) Disconnect the E6 and E7 ECU connectors.





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

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU