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DTC B1148 ESL power supply
DTC B1154 ESL power supply fail (ESL)
 
 
 
 
DIAGNOSTIC FUNCTION
When a short circuit (short to power supply) is detected in the power supply (microcomputer) circuit system of the electric steering lock, OSS-ECU stores the DTC B1148 and B1154. At the same time, OSS-ECU displays the steering lock abnormality warning screen to the multi information display of the combination meter. Also, when the DTC B1148 is the past trouble, the LIN bus may have a problem.
 
 
DTC SET CONDITION
Check Conditions
  • At electric steering lock certification
Judgment Criterion
  • Short circuit (short to power supply) in the power supply (microcomputer) circuit system of the electric steering lock is detected.
 
 
TROUBLESHOOTING HINT
  • Damaged harness wires and connectors
  • Electric steering lock malfunction
  • Malfunction of OSS-ECU
  • LIN bus malfunction <B1148 is the past trouble>
 
 
DIAGNOSIS
STEP 1. Check of short to power supply, short of ground, and open circuit in PCO line between electric steering lock connector and OSS-ECU connector
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.
 
STEP 2. After performing the locking and unlocking operations of the electric steering lock, recheck the diagnostic trouble code.
(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 the electric steering lock and register the VIN (Refer to ). Then go to Step 3.
Go to Step 3.
 
STEP 3. Recheck for diagnostic trouble code.
(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 the OSS-ECU and register the VIN (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction )