[ Model - ECLIPSE CROSS / Year - 2018 ]
2018 / ECLIPSE CROSS / EC - Workshop Manual
23 -AUTOMATIC TRANSMISSION > 23A-CVT > TROUBLESHOOTING<S-AWC><S-AWC> > DIAGNOSIS CODE PROCEDURES > CODE NO. C2100 BATTERY VOLTAGE MALFUNCTION (LOW VOLTAGE)
Code No.C2100: Battery Voltage Malfunction (Low Voltage)
 
 
 
 
OPERATION
AWC-ECU power supply is provided from the battery via ETACS-ECU.
 
 
DIAGNOSIS CODE SET CONDITIONS
This diagnosis code is set when the AWC-ECU power supply voltage and the actuator power supply voltage are less than 9 V.
 
 
PROBABLE CAUSES
  • Battery failure
  • Malfunction of charging system
  • Malfunction of ETACS-ECU (power supply circuit system)
  • Damaged harness wires and connectors
  • Malfunction of electronic control coupling solenoid
  • Malfunction of AWC-ECU

 
 
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE other system diagnosis code.
Check the ETACS diagnosis code (Refer to GROUP 54A - Troubleshooting ).
Is the diagnosis code set?
Perform the relevant troubleshooting.
Go to Step 2.
 
STEP 2. Check the battery.
Refer to GROUP 54A - Battery Test .
Is the check result normal?
Go to Step 4.
Charge or replace the battery. 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. Voltage measurement at AWC-ECU connector
Disconnect the connector, and measure the voltage between AWC-ECU connector terminal 4WDF and earth at the wiring harness side.
OK: System voltage
Is the check result normal?
Go to Step 7.
Go to Step 5.
 
STEP 5. Check of open circuit, and short circuit in 4WDF line between AWC-ECU connector and ETACS-ECU connector.
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.
 
STEP 6. M.U.T.-IIISE data list.
Check the following data list (Refer to ).
Item No.48: Battery voltage
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU ).
 
STEP 7. Check of open circuit in GND1 line between AWC-ECU connector and body earth.
Is the check result normal?
Go to Step 8.
Repair the connector(s) or wiring harness.
 
STEP 8. Check of short circuit in SOL+ line between electronic control coupling solenoid connector and AWC-ECU connector.
Is the check result normal?
Go to Step 9.
Repair the connector(s) or wiring harness.
 
STEP 9. Check of short circuit in SOL- line between electronic control coupling solenoid connector and AWC-ECU connector.
Is the check result normal?
Go to Step 10.
Repair the connector(s) or wiring harness.
 
STEP 10. Check of the electronic control coupling solenoid
Refer to .
Is the check result normal?
Go to Step 11.
Replace the electronic control coupling (Refer to ).
 
STEP 11. M.U.T.-IIISE data list.
Check the following data list (Refer to ).
Item No.48: Battery voltage
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the AWC-ECU (Refer to ).