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AV-188 < DTC/CIRCUIT DIAGNOSIS > [NAVIGATION] U1264 ANTENNA AMP. U1264 ANTENNA AMP. DTC Logic INFOID:0000000009642976 DTC DETECTION LOGIC Diagnosis Procedure INFOID:0000000009642977 Regarding Wiring Diagram information, refer to . 1. ANTENNA AMP. INSPECTION Visually inspect the antenna base (antenna amp.) and antenna feeder. Refer to Is inspection result normal? YES >> GO TO 2. NO >> Repair or replace malfunctioning components. 2. CHECK CONTINUITY BETWEEN AV CONTROL UNIT AND ANTENNA BASE 1. Turn ignition switch OFF. 2. Disconnect AV control unit connector M102 and antenna base connector M351. 3. Check continuity between AV control unit connector M102 and antenna base connector M351. 4. Check continuity between AV control unit connector M102 and ground. Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace harness or connectors. 3. CHECK AV CONTROL UNIT VOLTAGE 1. Connect AV control unit connector M102. 2. Turn ignition switch ON. 3. Check voltage between AV control unit connector M102 and ground. Is the inspection result normal? YES >> Replace antenna base. Refer to AV-226, "Removal and Installation" . NO >> Replace AV control unit. Refer to AV-222, "Removal and Installation" . CONSULT Display DTC Detection Condition Possible Cause ANTENNA AMP TERMINAL Open or short to ground is detected in Antenna • Antenna amp. disconnection. signal circuit. AV control unit Antenna base Continuity Connector Terminal Connector Terminal M102 58 M351 1 Yes AV control unit Ground Continuity Connector Terminal M102 58 — No AV control unit Ground Voltage (Approx.) (+) (–) Connector Terminal M102 58 — Battery voltage |