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AV-20 < DTC/CIRCUIT DIAGNOSIS > [BASE AUDIO] POWER SUPPLY AND GROUND CIRCUIT DTC/CIRCUIT DIAGNOSIS POWER SUPPLY AND GROUND CIRCUIT AUDIO UNIT INFOID:0000000009266702 Regarding Wiring Diagram information, refer to 1. CHECK FUSES Check that the following fuses are not blown. Are the fuses blown? YES >> Replace the blown fuse after repairing the affected circuit. NO >> GO TO 2. 2. POWER SUPPLY CIRCUIT CHECK 1. Turn ignition switch OFF. 2. Disconnect audio unit connector M43. 3. Check voltage between audio unit connector M43 and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair or replace harness or connectors. 3. GROUND CIRCUIT CHECK Inspect audio unit case ground. YES >> Inspection End. NO >> Repair audio unit case ground. Terminals Signal name Fuse No. 19 Battery power supply 29 (20A) 7 ACC power supply 18 (10A) Audio unit Ground Condition Voltage (Approx.) Connector Terminal M43 19 — Ignition switch: OFF Battery voltage 7 Ignition switch: ACC |