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DTC B2418: OSS authenticate timeout
 
 
caution
  • If diagnostic trouble code No. B2418 is stored, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the communication circuit is normal.
 
 
DTC SET CONDITION
KOS-ECU checks whether the OSS-ECU data is received via CAN bus line, and it stores DTC B2418 if the data cannot be received.
 
 
TECHNICAL DESCRIPTION (COMMENT)
If the reception of data from OSS-ECU received via CAN bus line (OSS-ECU sends data to KOS-ECU via CAN bus line) is not possible, KOS-ECU determines that a problem has occurred.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of CAN bus line
  • Malfunction of OSS-ECU
  • Malfunction of KOS-ECU
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T-III), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T-III).
Connect scan tool (M.U.T-III). Refer to "How to connect scan tool (M.U.T.-III) ."
(2) Turn the power supply mode of the engine switch to ON.
(3) Diagnose the CAN bus line.
(4) Turn the power supply mode of the engine switch to OFF.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C, Diagnosis ).
 
STEP 2. Using scan tool (M.U.T-III), read the other system diagnostic trouble code.
Check again if the DTC is stored in the OSS-ECU.
(1)
cautionTo prevent damage to scan tool (M.U.T-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T-III).
Connect scan tool (M.U.T-III). Refer to "How to connect scan tool (M.U.T.-III) ."
(2) Erase the DTC.
(3) Turn the power supply mode of the engine switch to ON.
(4) Check if DTC is stored.
(5) Turn the power supply mode of the engine switch to OFF.
Is the DTC stored?
Perform troubleshooting for the OSS-ECU (Refer to troubleshooting ). On completion, go to Step 3.
Go to Step 3.
 
STEP 3. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the KOS-ECU.
(1) Erase the DTC.
(2) Turn the power supply mode of the engine switch from OFF to ON.
(3) Check if DTC is stored.
(4) Turn the power supply mode of the engine switch from ON to OFF.
Is the DTC stored?
Replace KOS-ECU and register the ID codes (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).