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Page Hits: 1981302

Gen2 Cruise Control Diagnostics

Author: subearu
Date: Fri Jul 27, 2007 4:48 pm


Here are a few basic self diagnosis and switch test functions that you can perform.

This is how to let the system run a self test and check itself.

1. Drive the vehicle at 16 km/h {10 mph} or more.
2. Operate each of the cruise control switches.
3. Stop the vehicle and let it idle.
4. Turn on the cruise control main switch (1).
5. Turn and hold the RESUME/ACCEL switch on for at least 3 seconds (2). The cruise set indicator light will illuminate for 3 seconds, and then go off for at least 2 seconds. If any faults were detected the set indicator light will start flashing a code. Short duration flashes are a ones digit and long duration flashes are a tens digit. ie 7 short flashes would be a code 7 and one long flash followed by 5 short flashes would be a code 15. Here is the code list.

FOR 2000-2001 MODEL YEAR WITH SEPARATE CONTROL MODULE AND VACUUM CONTROL THROTTLE ACTUATOR
01 #2 BRAKE SWITCH FAULT OR VACCUM ACTUATOR FAULT...(circuit open in #2 switch of in vacuum actuator solenoids)
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FOR 2002-2005 MODEL YEAR WITH CONTROL MODULE AND ACTUATOR INTEGRATED INTO SAME UNIT
01 CRUISE CONTROL MODULE INTERNAL FAULT....(drive circuit failure)
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FOR 2000-2005 THE FOLLOWING CODES ARE BASICALLY THE SAME
05 #1 BRAKE SWITCH OR 15A STOP FUSE...no 12 volt signal from switch (this is same switch as is used for brake lights). 07 STOPLIGHT SWITCHES #1 OR #2 INCORRECT SIGNAL (brake switch #1 is normally open and brake switch #2 is normally closed)
11 SET/COAST SW-DEFECT (ALWAYS ON)...(input signal from control switch at 198 ohms at all times indicating switch stuck on) 12 RESUME/ACCEL SW-DEFECT (ALWAYS ON)...(input signal from control switch at 68 ohms at all times..switch stuck on)
13 CRUISE SWITCH SIGNAL SHORTED TO GROUND...(input signal from control switch shorted to ground at all times)
15 CRUISE CONTROL MODULE INTERNAL FAULT....(control circuit)
Make sure to double check the STOP and METER fuses in under dash fuse box first off as these fuses directly affect the system.


This is how to run a system test where you manually operate functions. If the flashcode is not output then need to check the related function.

1. Turn the ignition switch to the ON position.
2. Shift the transmission into Reverse
3. Verify that the cruise control main switch is off.
4. Turn and hold the RESUME/ACCEL switch on then turn on the cruise control main switch to activate system inspection. Continue to hold the RESUME/ACCEL untill the set indicator turns on before releasing. (The cruise set indicator light will illuminate for 3 seconds and then turn off indicating that you are in inspection mode.)
5. Operate each switch as described in the operation code list and note the operation code list pattern.


Operation code list.

When you operate the Set/Coast switch the set indicator should give you a 21 flash code. That would be 2 long flashes followed by 1 short flash.

Resume/Accel will give you 22 flashcode

Depressing the brake pedal will give you a 31

Shifting the trans selector to P or N will give you a 35

Driving over 25mph or 40 km/hr will give you a 37
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