B2287

2AZ-FXE STARTING: SMART KEY SYSTEM: B2287: LIN Communication Master Malfunction

DTC B2287 - LIN Communication Master Malfunction

DESCRIPTION

This DTC is output when there is a LIN communication problem between the main body ECU and certification ECU.
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 or certification ECU is replaced, perform the registration procedures for the engine immobiliser system Programming and Relearning.









WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR DTCS
(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Check for DTC B2287 and B2785.
Result:





HINT: If DTC B2785 is output, perform troubleshooting for DTC B2785 first B2785.

C -- CHECK INTERMITTENT PROBLEMS
B -- GO TO DTC B2785
A -- Continue to next step.
2. CHECK WIRE HARNESS (MAIN BODY ECU - CERTIFICATION ECU)
(a) Disconnect the E58 and IR ECU connectors.




(b) 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. 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 P, check that pressing the power switch causes the power source mode to change to on (READY).
OK:
Power switch on (READY).
NG -- REPLACE CERTIFICATION ECU
OK -- END (MAIN BODY ECU DEFECTIVE)