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TROUBLESHOOTING ACTIVE STABILITY CONTROL SYSTEM (ASC) 35C-35 YES : Replace the hydraulic unit (integrated with ). Then go to Step 10. NO : Intermittent malfunction (Refer to GROUP − How to Use Troubleshooting/How to Cope with Intermittent Malfunctions ). STEP 10. Check whether the diagnosis code is Q: Is diagnosis code No.C2104 set? YES : Return to Step 1. NO : This diagnosis is complete. Code No. C1073 Motor drive circuit CAUTION • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior − CAN Bus Diagnostics Table ). • Whenever ECU is replaced, ensure that the CAN bus lines are normal. • When the hydraulic unit (integrated with ASC-ECU) is replaced, always carry out the and OPERATION • ASC-ECU contains the power supply circuit (+BM terminal) for the pump motor. The pump motor is • The pump motor switch, which is incorporated in ASC-ECU, is always off unless the motor sole- • ASC-ECU activates the pump motor by turning on the ECU built-in pump motor switch. DIAGNOSIS CODE SET CONDITIONS If the pump motor switch voltage drop indicates high PROBABLE CAUSES Current trouble • Fusible link malfunction • Damaged wiring harness and connectors • Abnormality in battery or alternator • ASC-ECU malfunction Past trouble • Carry out diagnosis with particular emphasis on wiring harness and connector failures between − How to Use Troubleshooting/How to Treat Past Trouble ). DIAGNOSTIC PROCEDURE STEP 1. M.U.T.-III CAN bus diagnosis Q: Is the check result normal? YES : Go to Step 3. NO : Repair the CAN bus lines (Refer to GROUP − CAN Bus Diagnostics Table ). On completion, go to Step 2. STEP 2. Diagnosis code recheck after resetting Q: Is the diagnosis code No. C1073 set? YES : Go to Step 3. NO : This diagnosis is complete. STEP 3. Battery check − Battery Test . Q: Is the battery in good condition? YES : Go to Step 4. NO : Replace the battery. Then go to Step 10. STEP 4. Charging system check − On−vehicle Service/Alternator Output Line Voltage Drop Test . Q: Is the charging system in good condition? YES : Go to Step 5. NO : Repair or replace the charging system |