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TROUBLESHOOTING ENGINE COOLING 14-6 • Malfunction of fusible link SBF4. • Malfunction of radiator fan relay. • Malfunction of condenser fan relay. • Malfunction of fan control relay. • Malfunction of radiator fan motor. • Malfunction of condenser fan motor. • Malfunction of engine compartment relay box. • Malfunction of ETACS-ECU. • Malfunction of engine-ECU. DIAGNOSIS PROCEDURE CAUTION • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior • Before replacing the ECU, ensure that the CAN bus lines is normal. STEP 1. Check the CAN bus system diagnosis. − Explanation About The M.U.T-III CAN Bus Diagnostics ). Q: Is the check result satisfactory? YES : Go to Step 2. NO : Repair the CAN bus lines (Refer to GROUP − Troubleshooting, CAN Bus Diagnostic Table ). Then go to Step 23. STEP 2. Check the MPI system actuator test. − Troubleshooting, Actua- tor Test Reference Table ). • Item 14: Cooling fan motor Q: Is the check result normal? YES : Go to Step 22. NO : Go to Step 3. STEP 3. Check the MPI system diagnosis code. − Troubleshooting, Diagnosis Function ). Q: Is any diagnosis code set? YES : Repair the MPI system (Refer to GROUP 13A − Troubleshooting, Inspection Chart for Diagnosis Code ). Then go to Step 23. NO : Go to Step 5 <M/T>. NO : Go to Step 4 <CVT>. STEP 4. Check the CVT system diagnosis code . − Troubleshooting, Diag- nosis Function ). Q: Is any diagnosis code set? YES : Repair the CVT system (Refer to GROUP 23A − Troubleshooting, Diagnosis Code Chart ). Then go to Step 23. NO : Go to Step 5. STEP 5. Check the A/C system diagnosis code. − Troubleshooting, Diagnosis Function ). Q: Is any diagnosis code set? YES : Repair the A/C system (Refer to GROUP 55 − Troubleshooting, Diagnosis Code Chart ). NO : Go to Step 6. STEP 6. Check the ETACS system diagnosis − ETACS, Troubleshoot- ing, Diagnosis Function ). Q: Is any diagnosis code set? YES : Repair the ETACS system (Refer to GROUP 54A − ETACS, Troubleshooting, Diagnosis Code Chart ). Then go to Step 23. NO : Go to Step 7. STEP 7. Measure the terminal voltage at measure at the harness connector side. (2) Measure the terminal voltage between terminal F/LO and earth, between terminal F/HI and earth. OK: System voltage. Q: Is the check result normal? YES : Go to Step 13. NO : Go to Step 8. STEP 8. Connectors check: condenser fan relay Q: Is the check result normal? YES : Go to Step 9. NO : Repair or replace the damaged connector or |