B2275

2AR-FE STARTING: SMART KEY SYSTEM: B2275: STSW Monitor Malfunction
B2275 - STSW Monitor Malfunction

DESCRIPTION

This DTC is stored when the engine start request signal circuit inside the main body ECU is 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) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(d) Clear the DTCs.

(e) Depress the brake pedal with the engine switch on (IG), wait at least 15 seconds, and check whether DTC B2275 recurs.

Result





B -- USE SIMULATION METHOD TO CHECK Electronic Circuit Inspection Procedure
A -- Continue to next step.

2. CHECK MAIN BODY ECU (STSW VOLTAGE)

(a) Disconnect the E17 main body ECU connector.





(b) With the shift lever in P or N, depress the brake pedal fully.

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

HINT
The voltage is generated at terminal STSW for 0.3 seconds when the engine cranks.

Standard Voltage:





NG -- CHECK WHETHER ENGINE STARTS
OK -- Continue to next step.

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

(a) Disconnect the E17 main body ECU connector.





(b) Disconnect the A9 ECM connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK WHETHER ENGINE STARTS

(a) Temporarily replace the main body ECU (instrument panel junction block) with a new or normally functioning one.

(b) Check that the engine starts normally.

OK:

Engine starts normally.

NG -- GO TO SFI SYSTEM How to Proceed with Troubleshooting

OK -- END (MAIN BODY ECU IS DEFECTIVE)