B2271

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): 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 power source control ECU, a short in the IG output circuit inside the power source control ECU, a short between the power source control ECU and relay, and a short in the relay is detected.

HINT
When the power source control 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.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC

(a) Clear the DTC Smart Access System With Push-Button Start (for Start Function).

(b) Turn the engine switch on (IG).

(c) Depress the brake pedal.

(d) After 6 seconds have elapsed, check if the trouble occurs again.

(e) Check for DTCs again.

OK:

B2271 is not output.

NG -- INSPECT FUSE (AM2 FUSE)

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

2. INSPECT FUSE (AM2 FUSE)

(a) Remove the AM2 fuse from the main body ECU RH (cowl side junction block RH).

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

Standard Resistance:





NG -- REPLACE FUSE (AM2 FUSE)
OK -- Continue to next step.

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

(a) Disconnect the J55 connector from power source control ECU.





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

Standard Voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - BODY GROUND)

OK -- REPLACE POWER SOURCE CONTROL ECU