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DTC C2101: Power Supply High Voltage
 
 
 
 
OPERATION
AWC-ECU power supply is provided from the battery via ETACS-ECU.
 
 
DTC SET CONDITIONS
This DTC is stored when the abnormality below is detected:
  • Voltage between the battery and ETACS-ECU: More than 18 V
 
 
PROBABLE CAUSES
  • Malfunction of charging system
  • Loose battery terminal
  • Damaged harness wires and connectors
  • Malfunction of AWC-ECU
  • ETACS-ECU malfunction

 
 
DIAGNOSTIC PROCEDURE
STEP 1. Scan tool (M.U.T.-III) other system DTC.
Check the ETACS DTC (Refer to GROUP 54A - Diagnosis, Can Bus Diagnostics Table ).
Is the DTC stored?
Perform the relevant troubleshooting.
Go to Step 2.
 
STEP 2. Battery terminal check
Check that the battery terminal is not loose.
Is the check result normal?
Go to Step 3.
Securely install the battery terminal. Then go to Step 3.
 
STEP 3. Check the charging system.
Refer to GROUP 16 - Charging System .
Is the check result normal?
Go to Step 4.
Repair or replace the charging system component(s).
 
STEP 4. Check the battery.
Refer to GROUP 54A - Battery Test .
Is the check result normal?
Go to Step 5.
Replace the battery. Then go to Step 5.
 
STEP 5. Voltage measurement at AWC-ECU connector
Disconnect the connector, and measure the voltage between terminal BATT and body ground at the wiring harness side.
OK: Battery positive voltage
Is the check result normal?
Go to Step 6.
Repair the defective connector or the wiring harness. Then go to Step 7.
 
STEP 6. Scan tool (M.U.T.-III) data list.
Check the following data list (Refer to ).
  • Item No.31: Battery voltage (CAN input)
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the AWC-ECU (Refer to ). Then go to Step 7.
 
STEP 7. Check whether the DTC is stored again.
Is DTC No.C2101 stored?
Return to Step 1.
This diagnosis is complete.