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2 CHECK CONNECTOR 1. Disconnect control unit connectors. Check terminals for damage or loose connections. Then reconnect connectors. Does warning lamp activate again? Yes © GO TO 3. No © INSPECTION END 3 CHECK ABS CONTROL UNIT POWER SUPPLY 1. Disconnect control unit connector. SBR726DF Does battery voltage exist when ignition switch is turned ON? Yes © GO TO 4. No © GO TO 5. 4 CHECK CONTROL UNIT GROUND Refer to CONTROL UNIT GROUND in Ground Circuit Check, BR-104. Is ground circuit OK? OK © Check control unit pin terminals for damage or the connection of control unit harness NG © Check the following. I Harness connector E91 I Harness for open or short between control unit and ground 5 CHECK FUSE Check 10A fuse 31 (Engine control) for control unit. Refer to POWER SUPPLY ROUTING in EL section. Is fuse OK? Yes © GO TO 6. No © Replace fuse. 6 CHECK ABS CONTROL UNIT POWER SUPPLY CIRCUIT Check continuity between battery and control unit connector terminal 1. Does continuity exist? Yes © Check battery. Refer to BATTERY in EL section. No © Check the following. I Harness connector E91 I Harness for open or short between control unit and fuse GI MA EM LC EC FE AT AX SU ST RS BT HA SC EL IDX TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS TCS Low Voltage (Cont’d) BR-127 |