If the diagnosis code No. B2400 is set, diagnose the CAN bus lines.
When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSIS FUNCTION
If the registration of the keyless operation key ID to KOS-ECU fails, KOS-ECU sets the diagnosis code No. B2400.
JUDGEMENT CRITERIA
Assuming that another keyless operation key has already been registered with KOS-ECU, if the registration of the keyless operation key ID fails when a new keyless operation key is added or the existing key is replaced, KOS-ECU determines that there is a problem.
PROBABLE CAUSES
At the registration, there is an object near the keyless operation key which interferes with the communication.
Wrong keyless operation key registration method
Failure of keyless operation key code registration
Battery drain of keyless operation key
Malfunction of the keyless operation key
Malfunction of CAN bus line
Malfunction of KOS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Interference check at keyless operation key registration
At the keyless operation key registration, check if there is another key nearby or anything that interferes with the communication (magnets or objects that generate radio waves such as air-cleaning devices with a power plug).
Q.
Are there other keys or anything that interferes with the communication?
Move away or remove other keys or anything that interferes with the communication.
Go to Step 2
STEP 2. Check of keyless operation key registration method
Check that the correct method was used at the registration of keyless operation key.
Q.
Is the check result normal?
Go to Step 3
Register the keyless operation key.(Refer to .)
STEP 3. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 4
Repair the CAN bus line (Refer to GROUP 54C -
Troubleshooting ). On completion, go to Step 4.
STEP 4. M.U.T.-III diagnosis code
Check if any diagnosis code is set to the KOS-ECU.
Q.
Is the diagnosis code set?
Refer to diagnosis code chart .
Go to Step 5
STEP 5. Replace the battery in the keyless operation key and recheck the diagnosis code.
Replace the battery of the keyless operation key, which the diagnosis code is stored in, with new one, register the key ID and keyless operation key ID (refer to ), and check whether the diagnosis code is stored again.
(1)Turn the power supply mode of the engine switch from OFF to ON.
(2)Check if the diagnosis code is set.
Q.
Is the diagnosis code set?
Go to Step 6
The diagnosis is complete (Discharged battery).
STEP 6. Replace the keyless operation key and recheck the diagnosis code.
Replace the keyless operation key for which the diagnosis code is set with a new one, register the key ID and keyless operation key ID (refer to ), and check whether the diagnosis code is reset again.
(1)Turn the power supply mode of the engine switch from OFF to ON.
(2)Check if the diagnosis code is set.
Q.
Is the diagnosis code set?
Replace KOS-ECU and register the ID codes (Refer to ).
Move away or remove other keys or anything that interferes with the communication.
.)