B2275

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

DESCRIPTION

This DTC is output when the ST output circuits inside the power source control ECU is open or shorted.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT

(a) Delete the DTC Reading and Clearing Diagnostic Trouble Codes.

HINT
After all DTCs are cleared, turn the engine switch on (IG) and depress the brake pedal. After 15 seconds have elapsed, check if the trouble occurs again.

(b) Check for DTCs again.

OK:

No DTC is output.

NG -- INSPECT POWER SOURCE CONTROL ECU

OK -- END

2. INSPECT POWER SOURCE CONTROL ECU

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

Voltage:

HINT
Voltage is output for 0.3 seconds after engine start.

NG -- REPLACE POWER SOURCE CONTROL ECU
OK -- Continue to next step.

3. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - ECM)

(a) Disconnect the D44 ECU connector.

(b) Disconnect the A55 ECM connector.

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

4. CHECK POWER SOURCE CONTROL ECU OPERATION

(a) After replacing the power source control ECU with a normally functioning ECU, check that the engine can start.

OK:

Engine can start normally.

NG -- GO TO SFI SYSTEM

OK -- END (POWER SOURCE CONTROL ECU DEFECTIVE)