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STEP 4. Voltage measurement at the A-02 ASC-ECU ZC601293 0010 ASC-ECU MB991997 Check harness A-02 ASC-ECU (1) Disconnect the connector, connect special tool MB991997 to NOTE: Do not connect the special tool MB991997 to ASC- ECU. (2) Turn the ignition switch to the ON position. (3) Voltage between the terminal No. 1 and the body ground OK: 12 volts (Battery voltage) Q:Is the check result normal? YES: Go to Step 7. NO: Go to Step 5. STEP 5. Connector check: A-02 ASC-ECU connector Q:Is the check result normal? YES: Repair the wiring harness between the fusible link No. 26 and the A-02 ASC-ECU connector terminal No. 1. NO: Repair the defective connector. STEP 6. Connector check: A-02 ASC-ECU connector, C-33 Q:Is the check result normal? YES: The open or short circuit may be present in the power supply circuit. Repair the wiring harness between NO: Repair the defective connector. STEP 7. Wiring harness check between the A-02 ASC-ECU ⦆ Check the ground wires for open circuit. Q:Is the check result normal? YES: Go to Step 8. NO: Repair the wiring harness. STEP 8. Battery check Q:Is the battery in good condition? YES: Go to Step 9. NO: Charge or replace the battery. ACTIVE SKID CONTROL SYSTEM (ASC) 35C-179 DIAGNOSIS |