[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
42 -BODY > 42B-KEYLESS OPERATION SYSTEM (KOS) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > B1136 Stop lamp switch<CVT><CVT>
Code No.B1136 Stop lamp switch <CVT>
 
 
cautionWhen replacing the ECU, always check that the communication circuit is normal.
 
 
DIAGNOSTIC FUNCTION
When the stop lamp switch status is different from the brake switch information received from ETACS-ECU via CAN, KOS&OSS-ECU sets diagnosis code No.B1136, and displays the power supply system error warning the combination meter.
 
 
JUDGEMENT CRITERIA
Check Conditions
  • After KOS&OSS-ECU activation
Judgement Criterion
  • The difference between the stop lamp switch condition and the stop lamp switch information has been detected.
  • The stop lamp switch information from the ETACS-ECU cannot be received via CAN communication.
 
 
PROBABLE CAUSES
  • CAN bus line malfunction
  • Damaged wiring harness or connector (short to earth or open circuit between stop lamp switch and KOS&OSS-ECU or between stop lamp switch and ETACS-ECU)
  • ETACS-ECU malfunction
  • Malfunction of KOS&OSS-ECU
 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE CAN bus diagnostics
After performing the forced power supply output (Refer to ) "IG ON" using the M.U.T.-IIISE, diagnose the CAN bus line.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
 
STEP 2. Check of short to earth or open circuit in STP1 line between stop lamp switch connector and KOS&OSS-ECU connector
Is the check result normal?
Go to Step 3.
Repair the connector(s) or wiring harness.
 
STEP 3. Check of short to earth or open circuit in BKLP line between stop lamp switch connector and ETACS-ECU connector
Is the check result normal?
Go to Step 4.
Repair the connector(s) or wiring harness.
 
STEP 4. M.U.T.-IIISE other system data list
Check the ETACS-ECU data list.
  • Item No.113: Stop lamp switch (Refer to GROUP 54A - ETACS, Service Data Reference Table ).
Is the check result normal?
Go to Step 5.
Diagnose the ETACS-ECU (Refer to GROUP 54A - ETACS - Trouble Symptom Chart for Input Signal ).
 
STEP 5. M.U.T.-IIISE data list
Check the KOS&OSS-ECU data list.
  • Operate the brake pedal.
 
Item No.Check itemOperation stateDisplay
5Stop lamp switchBrake pedal is depressedON
Brake pedal releasedOFF
OK: Operation state and data list display agree with each other.
Is the check result normal?
Go to Step 6.
Replace the KOS&OSS-ECU and register the ID codes (Refer to ).
 
STEP 6. Check whether the diagnosis code is set again.
Is the diagnosis code set?
Replace the KOS&OSS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).