Entertainment System: Diagnosis Mazda MX-5 NC

MANUAL ANTENNA INSPECTION

Note. A amplifier is built into the manual antenna.

Scheme 4

1. Turn on the audio unit and radio, and measure the voltage at manual antenna connector terminal C. If the voltage is B+, go to the next step. If the voltage is not B+, inspect the audio unit or the antenna feeder.

Scheme 5

Scheme 6

1. Remove the battery cover.
2. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [LF]»(ref-244448-S25513985422006092400000) .)
3. Disconnect the manual antenna connector.
4. Inspect for continuity between the manual antenna terminals using an ohmmeter. If not as specified, replace the manual antenna.

Scheme 7

Scheme 8

Scheme 9

1. Verify that the continuity is as indicated in (Scheme 8). If not as indicated in the table, replace the AM/FM antenna feeder No.1.

Scheme 10

Scheme 11

1. Verify that the continuity is as indicated in the table. If not as indicated in (Scheme 10), replace the AM/FM antenna feeder No.2.