[ Model - ECLIPSE CROSS / Year - 2018 ]
Inspection Procedure 2: Audio equipment is reset or sound jump occurs at auto start.
2018 / ECLIPSE CROSS / EC - Workshop Manual
54 -CHASSIS ELECTRICAL > 54A-CHASSIS ELECTRICAL > DC/DC CONVERTER > SYMPTOM PROCEDURES > AUDIO EQUIPMENT IS RESET OR SOUND JUMP OCCURS AT AUTO START.
 
 
cautionEven when the diagnosis code No. B1301 or B1302 is set in the engine-ECU, do not conclude as a DC/DC converter or engine-ECU error, and be sure to check the DC/DC converter power supply circuit.
 
 
COMMENTS ON TROUBLE SYMPTOM
If a reset or sound jump occurs with the AUDIO equipment at the auto start, the following causes can be suspected.
  • Diagnosis code No. B1301 or B1302 is set in engine-ECU, and voltage is not boosted by DC/DC converter at auto start
  • DC/DC converter internal malfunction
  • Battery voltage drop
  • Communication error with engine-ECU and DC/DC converter
  • Engine-ECU malfunction
noteIf a reset or sound jump occurs with AUDIO equipment at other than the auto start, a problem is present with the power supply to the equipment that experienced the reset or sound jump. Therefore, be sure to check the power supply to the equipment.
 
 
 
PROBABLE CAUSES
  • The DC/DC converter (Entertainment) may be defective.
  • The engine-ECU may be defective.
  • The battery may be defective.
  • Damaged harness wires and connectors
 
 
 
 
DIAGNOSIS PROCEDURE
STEP 1. Check the power supply system circuit.
Check the DC/DC converter power supply circuit by referring to Troubleshooting. (Refer to .)
Is the check result normal?
Go to Step 2.
Repair according to the troubleshooting, and recheck the trouble symptom.
 
STEP 2. Check the M.U.T.-IIISE Diagnosis code for other systems.
Check if the diagnosis code No. B1301 or B1302 is set to engine-ECU.
Is the diagnosis code set?
Erase the diagnosis code, and then go to Step 3.
Go to Step 3
 
STEP 3. Check the M.U.T.-IIISE Diagnosis code for other systems.
Check if the diagnosis code is set in engine-ECU.
Is the diagnosis code set?
Diagnose the engine-ECU (Refer to GROUP 13A - Troubleshooting ).
Go to Step 4.
 
STEP 4. Battery test.
Check the battery state.(Refer to .)
Is the check result normal?
Go to Step 5.
Replace the battery.
 
STEP 5. Check of short to power supply, short to earth, and open circuit in OUT1 and OUT2 line between DC/DC converter (Entertainment) connector and intermediate connector.
Is the check result normal?
Go to Step 6.
Repair the connector(s) or wiring harness.
 
STEP 6. Replace the DC/DC converter (Entertainment) temporarily, and check the trouble symptom.
Is the check result normal?
Replace the DC/DC converter (Entertainment).
Replace the engine-ECU.