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SYMPTOM PROCEDURES TSB Revision SIMPLIFIED WIRING SYSTEM (SWS) 54B-91 STEP 4. Check the wiring harness between front-ECU Q: Is the wiring harness between front-ECU connector A-11X (terminal 5) and the battery in good condition? connector(s) may have loose, corroded or damaged STEP 5. Check front-ECU connector A-12X for loose, Q: Is front-ECU connector A-12X in good condition? YES : Go to Step 6. to GROUP 00E, Harness Connector Inspection . The system should communicate with the front-ECU normally. STEP 6. Check the ground circuit to the front-ECU. (1) Disconnect front-ECU connector A-12X and measure the resistance available at the relay box side of the connector. (2) Measure the resistance value between terminal 21 and ground. • The resistance should be 2 ohms or less. Q: Is the measured resistance 2 ohms or less? YES : Go to Step 8. AC305977AH CONNECTOR: A-11X RELAY BOX SIDE AC305977 CONNCTOR: A-12X AI 21 22 23 24 25 26 27 28 29 30 31 RELAY BOX SIDE AC305977 CONNCTOR: A-12X AI 21 22 23 24 25 26 27 28 29 30 31 RELAY BOX SIDE AC209364CM CONNECTOR A-12X 24 29 30 31 28 27 25 26 21 23 22 |