B2271

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2271: Ignition Hold Monitor Malfunction

DTC B2271 - Ignition Hold Monitor Malfunction

DESCRIPTION

This DTC is stored 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. Smart Key System
(b) Check whether DTC B2271 is output.

Result





B -- USE SIMULATION METHOD TO CHECK
A -- Continue to next step.
2. INSPECT FUSE (AM2)
(a) Remove the AM2 fuse from the engine room relay block.
(b) Measure the resistance according to the value(s) in the table below.
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 E1, E2 and 2D 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