B2272

2AR-FE STARTING: SMART KEY SYSTEM: B2272: Ignition 1 Monitor Malfunction
B2272 - Ignition 1 Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction occurs in the IG output circuit, which is between the IG1 relay actuation circuit inside the main body ECU and the IG1 relay.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM (IG1 RELAY MONITOR (INSIDE))

(a) Connect the Techstream to the DLC3.

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

(c) Enter the following menus: Body Electrical / Main Body / Data List.

(d) Read the display on the Techstream.

Main Body





OK:

When the engine switch is turned on (IG), ON is displayed on the Techstream.

NG -- INSPECT IG1 RELAY
OK -- Continue to next step.

2. CHECK SWITCH CONDITION (ENGINE SWITCH)

(a) Make sure that the electrical key is inside the cabin.

(b) With the shift lever in P, check that the power source mode changes as shown below each time the engine switch is pushed.

OK:

off -> on (ACC) -> on (IG) -> off

NG -- GO TO POWER SOURCE MODE DOES NOT CHANGE Power Source Mode Does Not Change

OK -- USE SIMULATION METHOD TO CHECK Electronic Circuit Inspection Procedure

3. INSPECT IG1 RELAY

(a) Remove the IG1 relay from the instrument panel junction block.





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

Standard Resistance:





NG -- REPLACE IG1 RELAY

OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)