Retrieving Diagnostic Trouble Codes: Notes

CAUTION: If Anti-Lock Brake System (ABS) Electronic Control Unit (ECU) replacement is necessary during testing, always ensure ABS ECU connectors and ground circuit are okay. If either is suspect, repair and repeat testing to confirm ABS ECU malfunction.

NOTE: Ensure battery is in good condition and is fully charged. DO NOT start engine when retrieving codes. If codes cannot be retrieved, perform ABS WARNING LIGHT CIRCUIT and Tc TERMINAL CIRCUIT tests under SYSTEM TESTS. If problem remains, replace ABS ECU.

Turn ignition on. Ensure ABS warning light illuminates for 3 seconds and turns off. If ABS warning light does not illuminate, see ABS WARNING LIGHT CIRCUIT under SYSTEM TESTS. If ABS warning light flashes or stays on constantly, retrieve Diagnostic Trouble Codes (DTC). See USING LEXUS SCAN TOOL or USING ABS WARNING LIGHT .