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LAN-78 < DTC/CIRCUIT DIAGNOSIS > [CAN] TCU BRANCH LINE CIRCUIT TCU BRANCH LINE CIRCUIT Diagnosis Procedure INFOID:0000000010120399 1. CHECK CONNECTOR 1. Turn the power switch OFF. 2. Disconnect the 12V battery cable from the negative terminal. Refer to LAN-26, "Precautions for Removing 3. Check the terminals and connectors of the TCU for damage, bend and loose connection (unit side and connector side). Is the inspection result normal? YES >> GO TO 2. NO >> Repair the terminal and connector. 2. CHECK HARNESS FOR OPEN CIRCUIT 1. Disconnect the connector of TCU. 2. Check the resistance between the TCU harness connector terminals. Is the measurement value within the specification? YES >> GO TO 3. NO >> Repair the TCU branch line. 3. CHECK POWER SUPPLY AND GROUND CIRCUIT Check the power supply and the ground circuit of the TCU. Refer to AV-590, "TCU : Diagnosis Procedure" Is the inspection result normal? YES (Present error)>>Replace the TCU. Refer to AV-594, "Removal and Installation" . YES (Past error)>>Error was detected in the TCU branch line. NO >> Repair the power supply and the ground circuit. TCU harness connector Resistance ( Ω) Connector No. Terminal No. M67 9 10 Approx. 54 – 66 |