DTC C2778

BHE040243000W33

DTC

C2778

Steering angle sensor (abnormal battery voltage)

DETECTION CONDITION

• The steering angle sensor detects an abnormality (open circuit) in the battery power supply (constant power supply).

POSSIBLE CAUSE

• BTN 30 A fuse malfunction
• DSC 7.5A fuse malfunction
• Open circuit in the wiring harness between the battery and steering angle sensor terminal B
• Poor connection at connectors (female terminal)

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT BTN AND DSC FUSE CONDITION

• Is the BTN 30 A fuse and DSC 7.5 A fuse normal?
Yes
Go to the next step.
No
Replace the fuse, then go to Step 3.
2

INSPECT STEERING ANGLE SENSOR POWER SUPPLY FOR OPEN CIRCUIT

• Turn the ignition switch off.
• Disconnect the steering angle sensor connector.
• Turn the ignition switch to the ON position (engine off).
• Measure the voltage between steering angle sensor terminal B (harness-side) and ground.
• Is the voltage B+?
Yes
Go to the next step.
No
Repair or replace the wiring harness for open circuit between battery positive terminal and steering angle sensor terminal B, then go to the next step.
3

VERIFY TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the memory.
• Perform the steering angle sensor initialization procedure.
• Is the same DTC present?
Yes
Replace the steering angle sensor, then go to the next step.
No
Go to the next step.
4

VERIFY AFTER REPAIR PROCEDURE

• Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC Table.)
No
DTC troubleshooting completed.