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Troubleshooting Guide
1. My vehicle is not listed in the identification and connection chart.
a) Please visit
www.pac-audio.com/swi
may not mean that is it not compatible, but may mean we have not tested your vehicle or do not have any information (schematics)
regarding your vehicle. If you are able to obtain specific information regarding your vehicle we may be able to help you to get this
module working in your vehicle.
2. LED flashes when trying to program the vehicle version number.
a) Please ensure that the rotary dial is set to the proper number and not to "0". Refer to page 2 and select a radio position before
turning on the ignition and attempting to program a version number.
3. No power / will not go into programming mode.
a) Check red wire connection and fuse. Make sure interface is connected to switched +12 volts, not constant +12 volts. Make sure
vehicle ignition is on.
4. The Interface controls the stereo immediately without pressing any buttons on the steering wheel.
a) During mapping, press the buttons on the steering wheel FIRMLY for 5 seconds. Releasing the button too early will cause the
Interface to send out a signal even when no buttons are pressed. Also ensure that the brown loop is not cut unless instructed.
5. The radio changes tracks when the vehicle is turned off or does not work when the car/truck is running.
a) Wire a relay to provide power. Pin 86 of the relay will connect to the radio's remote (Blue/White) wire. Pin 85 of the relay will
connect to chassis ground. Pin 30 of the relay will need to connect to the vehicle's constant 12v circuit. Pin 87 of the relay will
need to connect to the red wire on the SWI interface. A standard 5 pin automotive relay (Single Pole Double Throw) should be
used and can be found at most automotive parts stores.
6. I am using an Axxess radio replacement interface and I have programmed the vehicle version number, when I put the
module into mapping mode to map the vehicle buttons the LED just flashes steady.
a) Wire in relay as described in #5 (above)
7. When mapping the SWC button functions, it takes 5 seconds for the light to go out and it never comes back on,
or it never turns off.
a) Do the connection instructions say to connect another vehicle wire to accessory power or chassis ground? If so, test the circuit
with a Digital Multi-Meter (the factory radio must be plugged in) and verify that the factory radio is providing the same output
8. The Interface controls the radio whenever the steering wheel is turned (mostly late 80's early 90's Honda/Acura)
a) Program the interface for vehicle version #12.
9. The module is put into programming mode and once I press the Volume up button the LED turns off and does not come
back on.
a) This is normally an indication of a connection issue to the vehicle wiring. Double check the wiring with a digital multimeter to
ensure the proper voltages are seen on the interface wires.
10. What are the rest of these wires on the interface's 11 pin connector?
a) Green wire – (Used in versions 1, 2, 4 and 10) - 12v resistive systems normally found in GM vehicles. White wire – (Used in
versions 3, 8, 9 and 11) - 5v resistive systems normally found in Domestic and Japanese vehicles. Yellow Wire – (used in
version 5) Serial Data. Orange Wire – (used in version 6 and 7) Serial Data. Blue wire – (used in version 4) Data Output.
11. My module's LED is flashing but it is not controlling the aftermarket radio.
a) Check the perspective output with a multi meter.
Dial Setting 1,2,3,4 = DC voltage pulses on BLU/YEL wire (this is serial data).
Dial setting 5,6,7,8,9 = Variable resistance.
12. I am using a radio replacement Interface, an OS-4 or C2R module, and the instructions for the vehicle version number
are different from what is shown in the vehicle application guide.
a) When using a radio replacement interface you will want to follow the instructions for the radio replacement interface and not the
ones found in the vehicle application guide.
13. Only some SWC buttons are working.
a) Verify wiring instructions and configuration. Some vehicles have multiple SWC wires, and sometimes require the addition of resistors.
14. Buttons do not work when car is running, only when car is not running.
a) Perform "Mapping SWC button functions" in Step 4, but with the vehicle running.
15. Resistor Pack Definitions. These are the colors and values of resistors are provided with your SWI-RC module.
47 Ohm = Yel, Vio, Blk.
1000 Ohm = Brn, Blk, Red.
We are always looking for new vehicle information. If you've successfully completed the installation on a vehicle with
steering wheel controls, and the vehicle is not listed in these instructions or on our Website, contact us at
techsupport@pac-audio.com so that we may add the information to the instructions.
4
Legend: SWC- Steering Wheel Control
for the most up to date listing of compatible vehicles. If your specific vehicle is not listed
100 Ohm = Brn, Blk, Brn.
150 Ohm = Brn, Grn, Brn.
1500 Ohm = Brn, Grn, Red.
Working on a new or unlisted vehicle?
Pacific Accessory Corporation
Santa Ana, CA 92705
techsupport@pac-audio.com • www.pac-audio.com
Copyright 2013 Pacific Accessory Corporation. Content subject to change without notice.
V.I.I.G.- Vehicle Install Information Guide V.C.C. - Vehicle Connection Chart
560 Ohm = Grn, Blu, Brn.
3900 Ohm = Org, Wht, Red.
5100 Ohm = Grn, Brn, Red.
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