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LAN-42 < COMPONENT DIAGNOSIS > [CAN] HVAC BRANCH LINE CIRCUIT HVAC BRANCH LINE CIRCUIT Diagnosis Procedure INFOID:0000000004219045 1. CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the terminals and connectors of the controller (auto amp.) 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 controller (auto amp.). 2. Check the resistance between the controller (auto amp.) harness connector terminals. Is the measurement value within the specification? YES >> GO TO 3. NO >> Repair the controller (auto amp.) branch line. 3. CHECK POWER SUPPLY AND GROUND CIRCUIT Check the power supply and the ground circuit of the controller (auto amp.). Refer to Is the inspection result normal? YES (Present error)>>Replace the controller (auto amp.). Refer to HAC-14, "Component Part Location" YES (Past error)>>Error was detected in the controller (auto amp.) branch line. NO >> Repair the power supply and the ground circuit. Controller (auto amp.) harness connector Resistance ( Ω) Connector No. Terminal No. M37 15 35 Approx. 54 – 66 |