Operation CHARM: Car repair manuals for everyone.

Test A: Poor Reception - AM/FM

PINPOINT TEST A: POOR RECEPTION - AM/FM

Normal Operation
The antenna receives AM and FM radio waves. The antenna module is integral with the roof-mounted antenna and receives voltage from the audio control module (ACM) through circuit CME44 (YE/GN).

The noise suppression equipment reduces engine ignition and electrical systems interference transmitted through the speakers.

- DTC B2103 (Antenna Not Connected) - sets during the on-demand self-test when the signal strength is less than the configured minimum value. The ACM must be tuned to AM during the self-test for this DTC to set. Also, the DTC will not set when the ACM self-diagnostic mode is run.

This pinpoint test is intended to diagnose the following:
- RDS/PTY function setting
- Wiring, terminals or connectors
- Antenna
- Antenna cable
- Charging system
- Ignition system
- Noise suppression equipment
- ACM


A1-A6:






A6-A9:






A10-A11: