B2275

DTC Code	DTC Name
B2275	STSW Monitor Malfunction

DESCRIPTION

This DTC is stored when a malfunction is detected in the starter circuit inside the power management control ECU.

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code	DTC Detection Condition	Trouble Area	DTC Output Confirmation Operation
B2275	Power management control ECU internal HV activation request output circuit malfunction or external circuit malfunction (1-trip detection logic*)	AM2 fuse Steering lock system Power management control ECU Wire harness or connector	Turn the power switch on (IG) and wait 10 seconds or more, then start the hybrid control system 3 times.

*: Only detected while a malfunction is present.

Vehicle Condition and Fail-safe Function when Malfunction Detected
Vehicle Condition when Malfunction Detected	Fail-safe Function when Malfunction Detected
The power source mode changes to on (READY) even though the hybrid control system is not started. The power source mode does not change to on (READY) even though the hybrid control system is started.	-

WIRING DIAGRAM

INSPECTION PROCEDURE

Note

When using the Techstream with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and vehicle begins, or 2) connect the Techstream to the vehicle, select the vehicle type under manual mode, and then enter the following menus:

for Power Source Control: Body Electrical / Power Source Control / DTC.

for Smart Key: Body Electrical / Smart Key / DTC.
The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
Inspect the fuses of circuits related to this system before performing the following inspection procedure.
After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.

Tech Tips

Related Data List and Active Test Items
DTC	Data List Item	Active Test Item
B2275	Power Source Control Starter Request Signal	-

PROCEDURE

CHECK FOR DTC
1. Clear the DTCs Click here.
2. Turn the power switch on (IG).
3. After 25 seconds have elapsed, check if the DTC has been set again.
  
  OK
  
  DTC B2285 is not output.
NG
GO TO DTC CHART (DTC B2285)

OK

OK
DTC B2285 is not output.

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

Text in Illustration
*a	Front view of wire harness connector (to Power Management Control ECU)

Disconnect the I3 and I4 connector from the power management control ECU.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
I3-1 (AM22) - Body ground	Power switch off	11 to 14 V
I4-7 (AM21) - Body ground	Power switch off	11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

OK

CHECK HARNESS AND CONNECTOR (GROUND)

Text in Illustration
*a	Front view of wire harness connector (to Power Management Control ECU)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
I3-5 (E01) - Body ground	Always	Below 1 Ω
I3-6 (E1) - Body ground	Always	Below 1 Ω
I4-4 (E12) - Body ground	Always	Below 1 Ω
I4-5 (E02) - Body ground	Always	Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE POWER MANAGEMENT CONTROL ECU Click here

SMART KEY SYSTEM (for Start Function), Diagnostic DTC:B2275