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4.1 Antenna Systems (AS)    >   23 Electrical Test Program - Test

Test scope Test connection Test condition Nominal value Possible cause/Remedy 1.0 Noise suppression capacitor Function           Ignition: OFF Radio: ON Tune-in a weak AM radio station. Engine: at Idle No change in reception quality. Replace noise suppression capacitor on right C-pillar. 2.0 RF antenna cable to radio (A2) Continuity Short circuit (inner shielding) Radio: OFF Disconnect antenna cable (b) between A2 and A2/16. < 10 Wiring. 3.0 RF antenna cable to bumper FM antenna amplifier (A2/15) Continuity Short circuit (inner shielding) Radio: OFF Disconnect antenna cable (a) between A2/15 and A2/16. < 10 Wiring. 4.0 Radio (A2) Voltage supply W0 A2/16 b Radio: OFF Disconnect antenna cable (a) from A2/16. Radio : ON 11 - 14 V Wiring, A2 (see 3.1 23 ). 5.0 Rear window AM antenna amplifier (A2/16) and bumper FM antenna amplifier (A2/15) Total current draw A2/16 A2 Connect ampmeter between A2/16 and control wire (c) from radio. Radio: ON 52 - 72 mA 5.1 If nominal value is okay, but reception quality is poor: AM band Replace A2/16 and perform 11 . If no improvement, replace rear window antenna. FM band 7.0 5.1 Rear window AM antenna amplifier (A2/16) Current draw A2/16 A2 Connect ampmeter between A2/16 and control wire (c) from radio. Disconnect antenna cable (a) from A2/16. Radio: ON 15 - 25 mA 6.0 , A2/16, If nominal value is okay: 5.2 5.2 Bumper FM antenna amplifier (A2/15) Current draw A2/16 A2/16 Connect ampmeter between A2/16 and antenna cable (a) from A2/15. Radio: ON Note: Voltage is supplied via the inner cable of RF cable. 37 - 47 mA 6.0 , A2/15 6.0 Ground A2/15 A2/16 Radio : OFF Note: Do not loosen mounting connection on A2/15 or A2/16. Mounting connection also serves as ground. < 1 Contact resistance at ground. 7.0 Antenna cable Bumper antenna Measure between connection on bumper (at solder connection) and pin on A2/15. < 1 If nominal value is okay, replace A2/15 and perform 11 . If no improvement, replace rear bumper antenna.