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STEP 7. Resistance measurement at A-01 ABS-ECU ZC601293 0021 Check harness ABS-ECU MB991974 A-01 ABS-ECU (1) Disconnect the ABS-ECU connector, connect special tool NOTE: Do not connect the special tool MB991974 to ABS- ECU. (2) Resistance between the wheel speed sensor power supply OK: No continuity Q:Is the check result normal? YES: Go to Step 10. NO (Not normal at the terminal No. 24 or 25): Go to Step 8. STEP 8. Connector check: A-01 ABS-ECU connector, D-114 Q:Is the check result normal? YES: Go to Step 9. NO: Repair the defective connector. STEP 9. Wiring harness check between A-01 ABS-ECU ⦆ Check for short circuit in wheel speed sensor <RL> circuit Q:Is the check result normal? YES: Replace the wheel speed sensor <RL>. NO: Repair the wiring harness. ANTI-LOCK BRAKING SYSTEM (ABS) 35B-23 ANTI-LOCK BRAKING SYSTEM (ABS) DIAGNOSIS |