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LAN-306 < DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 9)] BCU BRANCH LINE CIRCUIT BCU BRANCH LINE CIRCUIT Diagnosis Procedure INFOID:0000000005577217 1. CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con- - Brake booster control unit - Harness connector B201 - Harness connector M117 - Harness connector M6 - Harness connector E106 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 brake booster control unit. 2. Check the resistance between the brake booster control unit harness connector terminals. Is the measurement value within the specification? YES >> GO TO 3. NO >> Repair or replace (if shield line is open) the brake booster control unit branch line. 3. CHECK POWER SUPPLY AND GROUND CIRCUIT Check the power supply and the ground circuit of the brake booster control unit. Refer to BOOSTER CONTROL UNIT : Diagnosis Procedure" Is the inspection result normal? YES (Present error)>>Replace the brake booster control unit. Refer to . YES (Past error)>>Error was detected in the brake booster control unit branch line. >> Repair the power supply and the ground circuit. Brake booster control unit harness connector Resistance ( Ω ) Connector No. Terminal No. B250 14 5 Approx. 108 – 132 |