| All values measured to ground unless otherwise noted | |||
| A2 | |||
| A.1 | VSS signal input | 0-2 VAC, 0-300 Hz with increasing vehicle speed Radio on: Output volume increasing step-by-step |
Feed from traction system ECM Note 1 |
| A.2 | Pin not used | ||
| A.3 | CTEL mute ground signal input | Radio on, activate CTEL function: Radio switches to mute and display shows PHONE |
Refer to wiring diagrams 82.70 |
| A.4 | Circuit 30 power input | 12 VDC at all times | Feed from F1f26 |
| A.5 | Control voltage output for antenna and sound system amplifier | 12 VDC with radio on | Note 2 |
| A.6 | Circuit 58d input, "Dimmed Instrument Illumination" voltage | Varies from 0.5-12 VDC, depending on setting of dimming value Parking lights on: Radio buttons illuminated Radio on: Radio buttons and display illuminated |
Feed from IC via Z81/4 |
| A.7 | Circuit 15R power input | Ignition on 12 VDC | Feed from F1f21 |
| A.8 | Main ground to W18 | Approx. 0 Ohms to ground | |
| B.1 B.2 |
Right rear audio signal plus output Right rear audio signal minus output |
Radio on > 0.2 VAC across pin B.1-B.2 | Note 1 |
| B.3 B.4 |
Right front audio signal plus output Right front audio signal minus output |
Radio on > 0.2 VAC across pin B.3-B.4 | Note 1 |
| B.5 B.6 |
Left front audio signal plus output Left front audio signal minus output |
Radio on > 0.2 VAC across pin B.5-B.6 | Note 1 |
| B.7 B.8 |
Left rear audio signal plus output Left rear audio signal minus output |
Radio on > 0.2 VAC across pin B.7-B.8 | Note 1 |
| C.8-10 | Ground to W18 | Approx. 0 Ohms to ground | |
| 2 | Antenna input connector | Radio frequency | Note 2 |
| N40/3 | |||
| 1 2 |
Right front audio signal minus input Right front audio signal plus input |
Radio on > 0.2 VAC across pin 1-2 and volume to max. | Note 1 |
| 3 | Left rear audio signal minus input | Radio on > 0.2 VAC across pin 3-5 and volume to max. | Note 1 |
| 4 | Right rear audio signal minus input | Radio on > 0.2 VAC across pin 4-6 and volume to max. | Note 1 |
| 5 | Left rear audio signal plus input | See pin 3 | |
| 6 | Right rear audio signal plus input | See pin 4 | |
| 7 | Pin not used | ||
| 8 | Control voltage input for antenna and sound/ system amplifiers | 12 VDC with radio on | Note 2 |
| 9 | Main ground to W6 | Approx. 0 Ohms to ground | |
| 10 | Left front audio signal minus input | Radio on > 0.2 VAC across pin 10-18 and volume to max. | Note 1 |
| 11 | Right rear speakeroutput | Radio off, measure across pins 11-19: 1.5-2.5 Ohms (sedan) 0.5-1.5 Ohms (wagon) |
Note 1 |
| 12 | Left rear speaker output | Radio off, measure across pins 12-20: 1.5-2.5 Ohms (sedan) 0.5-1.5 Ohms (wagon) |
Note 1 |
| 13 | Left front speaker output | 1.5-2.5 Ohms across pins 13-21 with radio off | Note 1 |
| 14 | Right front speaker output | 1.5-2.5 Ohms across pins 14-22 with radio off | Note 1 |
| 15 | Left rear door speaker output | 1.5-2.5 Ohms across pins 15-23 with radio off | Note 1 |
| 16 | Pin not used | ||
| 17 | Right rear door speaker output | 1.5-2.5 Ohms across pins 17-25 with radio off | Note 1 |
| 18 | Left front audio signal plus input | See pin 10 | |
| 19 | Right rear speaker output | See pin 11 | |
| 20 | Left rear speaker output | See pin 12 | |
| 21 | Left front speaker output | See pin 13 | |
| 22 | Right front speaker output | See pin 14 | |
| 23 | Left rear door speaker output | See pin 15 | |
| 24 | Pin not used | ||
| 25 | Right rear door speaker output | See pin 17 | |
| 26 | Circuit 30 power input | 12 VDC all times | |
| Note 1 | Refer to D. M. Info./Comm. Vol. 2, 5.11 | ||
| Note 2 | Refer to D. M. Info./Comm. Vol. 2, 4.5 | ||
| Note 3 | Substitution test for speaker sytems Use signal generator |
Disconnect appropriate speaker and connect to a low frequency signal generator. Adjust output to approx. 2.5 Vpp and vary frequency over a range from 10 Hz to 15 kHz. Sound should be audible over most of the range, depending of speaker system under test (bass/tweeter) |
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