APPENDIX
C
Manual No. 016-0171-122 Rev. I 253
A ppendi x C
Testing Extension
Cables
Speed Sensor Extension Cable
Verify that the system is in the Wheel Speed Sensor mode while testing the cable. Disconnect the extension
cable from the speed sensor assembly cable. Hold the extension cable connector so that the keyway is
pointing in the 12 o’clock position as shown below.
FIGURE 1. Speed Sensor Extension Cable Pin Diagram
Note: If a radar type speed sensor is used, the voltage between the 10 o’clock and 2 o’clock positions
may read 12 VDC.
If a +5V DC voltage reading is not present, disconnect the flow meter cable and re-test the speed
sensor cable. If the voltage reads +5V DC when the flow meter cable is disconnected, test the flow
meter cable per Flow Meter/Encoder Extension Cables section on page 255.
10 o’clock
Ground
2 o’clock
Power
Keyway
6 o’clock
Signal
5 VDC
5 VDC
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