B2275

2AZ-FXE STARTING: SMART KEY SYSTEM: B2275: STSW Monitor Malfunction

DTC B2275 - STSW Monitor Malfunction

DESCRIPTION

This DTC is output when there is an open, short, or any other problem in the HV control system on (READY) request output circuit inside the main body ECU or in the external circuit.
HINT: When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
After the main body ECU is replaced, perform the registration procedures for the engine immobiliser system Programming and Relearning.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT
(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.
HINT: After all DTCs are cleared, turn the power 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 -- CHECK WIRE HARNESS (MAIN BODY ECU - HV CONTROL ECU)
OK -- CHECK INTERMITTENT PROBLEMS
2. CHECK WIRE HARNESS (MAIN BODY ECU - HV CONTROL ECU)
(a) Disconnect the E9 ECU connector.




(b) Disconnect the A61 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.
3. INSPECT MAIN BODY ECU




(a) Reconnect the connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPLACE MAIN BODY ECU
OK -- Continue to next step.
4. CHECK MAIN BODY ECU OPERATION
(a) After replacing the main body ECU with a normally functioning ECU, check the power source mode change.
(1) When the key is inside the vehicle, the brake pedal is depressed and the shift lever is in the P position, check that pressing the power switch causes the power source mode to change to on (READY).
OK:
Power switch on (READY).
HINT: If power mode does not change to ON (READY) Power Source Mode Does Not Change To ON (Ready).

NG -- GO TO OTHER PROBLEM
OK -- END (MAIN BODY ECU DEFECTIVE)