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TROUBLESHOOTING
SELF DIAGNOSTIC TESTING PROCEDURE
The Cruise Control is equipped with a Red Self
Diagnostic Surface Mount Light Emitting Diode
(LED) located underneath the rubber grommet on
the CRUSE MODULE.
Utilize the following Self Diagnostic Procedure to
troubleshoot your cruise control if it does not
function properly once installed.
Carefully follow the procedures below to enter your cruise control into Self Diagnostic Mode.
Step 1: Turn the cruise control switch OFF.
Step 2: Turn the ignition to the OFF position.
Step 3: Standard Control Switch (all except HND-2): Press and hold the RESUME/ACCEL slide switch while you turn
the ignition switch to the ON position without starting the engine. Now release the RESUME/ACCEL slide switch.
HND-2 Control Switch: Turn the ignition switch to the ON position without starting the engine, hold the
RESUME/ACCEL button down while you turn the cruise control switch to the ON position.
Step 4:
The Diagnostic LED should be OFF at this time. You are now in Self Diagnostic Mode. Continue to follow the
procedures below to test your cruise control switch, brake switch connections and VSS signal.
Step 5:
Press and Release the SET/COAST button. The LED should light each time the button is
pressed and go out when it is released. If so, continue to Step 6; if not, go to Step 5a.
a. Check steps to entering Diagnostic Mode and test again.
b. Check Programming Switch# 12. It should be ON for a Normally Closed Circuit Control Switch and OFF for
a Normally Open Circuit Control Switch. If set incorrectly, reset and reenter Diagnostic Mode.
c. Check power to the CRUISE MODULE if none of the diagnostic commands are functioning.
d. Check Cruise Control Switch.
Step 6:
Press and release the RESUME/ACCEL slide switch / button. The LED should light each time the slide switch / button
is pressed and go out when it is released. If so, continue to Step 7; if not, go to Step 6a.
a. Check steps to entering Diagnostic Mode and test again.
b. Check power to the CRUISE MODULE if none of the diagnostic commands are functioning.
c. Check Cruise Control Switch.
Step 7:
You will need a second person to help you perform this test. Press and release the Brake Pedal. The LED should light
each time the brake is pressed and go out when it is released. If so, continue to Step 8; if not, go to Step 7a.
a. Check steps to entering Diagnostic Mode and test again.
b. Check power to the Red Brake Positive wire.
c. Check power to the CRUISE MODULE if none of the diagnostic commands are functioning.
d. Check Brake Switch Connector and wiring to brake switch.
Step 8:
A. Vehicle's own computer as VSS source: Roll the vehicle at least two (2) meters forward or backward, the LED
should flash and continue to flash at the same rate. If so, continue to Step 9; if not, go to Step 8Ai.
i. Check steps to entering Diagnostic Mode and test again.
ii. Check Programming Switch# 10. It should be ON for Square Wave Input. If set incorrectly, reset and reenter
Diagnostic Mode.
iii. Some vehicles need to be pushed more than two (2) meters. In that case, raise one (1) of the vehicle drive
wheels (both drive wheels on a limited slip differential) and block the non drive wheels. Use a support stand for
safety. Spin the drive wheel by hand as fast as possible. The LED should flash and continue to flash at the
same rate. If so, continue to Step 9; if not, go to Step 8Aiv.
iv. Either your VSS wire is incorrect or your connection is bad. Inspect your VSS connection and reenter Self
Diagnostic Mode.
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