B2271

2AR-FE STARTING: SMART KEY SYSTEM: B2271: Ignition Hold Monitor Malfunction
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) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG) and turn the Techstream on.

(c) Clear the DTCs.

(d) Start the engine.

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

(f) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(g) Read the DTCs.

Result:





B -- USE SIMULATION METHOD TO CHECK (SYSTEM IS OK) Electronic Circuit Inspection Procedure
A -- Continue to next step.

2. INSPECT FUSE (AM2-2)

(a) Remove the AM2-2 fuse from the engine room No. 1 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 E15 and E16 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 (INSTRUMENT PANEL JUNCTION BLOCK)