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DTC C2334 SAS neutral point not learned
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
OPERATION
The BSW-ECU (slave) communicates with the steering wheel sensor via the gateway-ECU, the BSW-ECU (master) and the CAN bus lines.
 
 
CHECK CONDITION
Ignition switch is in the ON position.
 
 
DIAGNOSTIC FUNCTION AND JUDGMENT CRITERIA
When the BSW-ECU (slave) receives the signal, which indicates that the neutral position of the steering wheel sensor has not been learnt yet, the ECU will set DTC C2334.
 
 
TROUBLESHOOTING HINTS
  • Neutral position of steering wheel sensor not learned
  • The steering wheel sensor (incorporated in column switch assembly) may be defective
  • The BSW-ECU (master/slave) may be defective
 
 
DIAGNOSIS
STEP 1. Check whether the BSW-ECU (master) sets a DTC.
Check if DTC C2334 is set in the BSW-ECU (master).
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (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) ."
Is the DTC set?
Troubleshoot the BSW-ECU (master) (Refer to ).
Go to Step 2.
 
STEP 2. Check whether the DTC is set again.
Check again if the DTC is set in the BSW-ECU (slave).
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Is the DTC set?
Replace the BSW-ECU (slave). Then go to Step 3.
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
 
STEP 3. Check whether the DTC is set again.
Check again if the DTC is set in the BSW-ECU (slave).
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) Check if the DTC is set.
Is the DTC set?
Use the BSW-ECU (slave), which has been removed at step 2, as the BSW-ECU (master).
This diagnosis is complete.