B2271

1UR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2271: Ignition Hold Monitor Malfunction
B2271 - Ignition Hold Monitor Malfunction

DESCRIPTION

This DTC is output when the IG output circuits inside the main body ECU are open or shorted.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WHETHER DTC OUTPUT RECURS

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Start the engine.

(c) Allow the engine to idle for 1 minute or more.

(d) Read DTCs.

Result:





B -- END (SYSTEM IS OK)
A -- Continue to next step.

2. INSPECT FUSE (AM2)

(a) Remove the AM2 fuse from the passenger side junction block.

(b) Measure the resistance of the fuse.

Standard resistance:





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

3. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)





(a) Disconnect the L12, L13 and DA main body ECU connectors.

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

Standard voltage:





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MAIN BODY ECU