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Home >> Subaru >> 2017 >> Forester 2.0XT Touring >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> SUBARU Eyesight System (Driver Assist) (Diagnostics) >> Diagnostics with Phenomenon >> Diagnostic Procedure With Phenomenon >> Adaptive Cruise Control, Conventional Cruise Control

Adaptive Cruise Control, Conventional Cruise Control

Phenomenon Check Item Note
1 Cruise control main switch is not turned to ON. (CRUISE indicator light does not illuminate.) Or cruise control is cancelled without operating the cruise control command switch. (1) Check the ECM cruise control cancel code. Perform the diagnosis according to displayed cancel code. Ref. to EyeSight (DIAGNOSTICS)>ECM Cancel Code(s) Display .
If not displayed, go to (2).
(2) Perform the real-time diagnosis. Check the input signal of cruise control system. Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis .
When normal, go to (4).
When abnormal, go to (3).
(3) Check the EyeSight steering switch. Check EyeSight steering switch Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK EyeSight STEERING SWITCH .
(4) Check the CRUISE indicator. CHECK CRUISE INDICATOR LIGHT. Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK ADAPTIVE CRUISE CONTROL INDICATOR LIGHT/CONSTANT SPEED CRUISE CONTROL INDICATOR LIGHT AND CRUISE SET INDICATOR LIGHT .
2 Cruise control cannot be set.
Or cruise control is cancelled without releasing operation.
NOTE:
  • Do not turn the ignition switch to OFF after the cruise control is deactivated.
  • Do not operate the EyeSight steering switch after the cruise control is deactivated.

    If the above is performed, the cancel code the ECM will be cleared.

(1) Check the ECM cruise control cancel code. Perform the diagnosis according to displayed cancel code. Ref. to EyeSight (DIAGNOSTICS)>ECM Cancel Code(s) Display .
If not displayed, go to (2).
(2) Perform the real-time diagnosis. Check the input signal of cruise control system. Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis .
When normal, go to (6).
When abnormal, go to the relevant items for (3), (4), (5).
(3) Check the EyeSight steering switch. Check EyeSight steering switch Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK EyeSight STEERING SWITCH .
(4) Check stop light switch and brake switch. CHECK STOP LIGHT SWITCH AND BRAKE SWITCH Ref. to BRAKE>Brake Pedal . Ref. to EyeSight (DIAGNOSTICS)>Diagnostic Procedure with ECU Cancel Code>12 .
(5) Check the neutral position switch. CHECK NEUTRAL POSITION SWITCH. Ref. to EyeSight (DIAGNOSTICS)>Diagnostic Procedure with ECU Cancel Code>14 . Ref. to EyeSight (DIAGNOSTICS)>Diagnostic Procedure with ECU Cancel Code>62 .
(6) Check vehicle speed sensor. Check the vehicle speed sensor. Ref. to EyeSight (DIAGNOSTICS)>Diagnostic Procedure with ECU Cancel Code>22 .
3 SET indicator does not illuminate. Check the SET indicator. CHECK SET INDICATOR. Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK ADAPTIVE CRUISE CONTROL INDICATOR LIGHT/CONSTANT SPEED CRUISE CONTROL INDICATOR LIGHT AND CRUISE SET INDICATOR LIGHT .
4 Vehicle speed is not held within set speed ±3 km/h (±2 MPH) on a level road. Check the vehicle speed sensor. Inspection of vehicle speed sensor Ref. to EyeSight (DIAGNOSTICS)>Diagnostic Procedure with ECU Cancel Code>22 .
5 Vehicle speed does not increase or does not return to set speed after RES/+ switch has been pressed. (1) Perform the real-time diagnosis.
Check the input signal of cruise control system.
Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis . When abnormal, go to (2).
(2) Check the RES/+ switch. Inspection of RES/+ switch Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK EyeSight STEERING SWITCH .
6 Vehicle speed does not decrease after SET/- switch has been pressed. (1) Perform the real-time diagnosis. Check the input signal of cruise control system. Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis . When abnormal, go to (2).
(2) Check the SET/- switch. CHECK SET/- SWITCH. Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK EyeSight STEERING SWITCH .
7 Cruise control is not released after CRUISE switch has been pressed. (1) Perform the real-time diagnosis. Check the input signal of cruise control system. Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis . When abnormal, go to (2).
(2) Check the CRUISE switch. Check CRUISE switch Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK EyeSight STEERING SWITCH .
8 Following distance does not change, even after the following distance switch is pressed. (1) Perform the real-time diagnosis. Check the input signal of cruise control system. Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis . When abnormal, go to (2).
(2) Check the following distance switch. Inspection of following distance switch Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>CHECK EyeSight STEERING SWITCH .
9 Cruise control is not released after brake pedal has been depressed. (1) Perform the real-time diagnosis.
Check the input signal of cruise control system.
Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis . When abnormal, go to (2).
(2) Check stop light switch and brake switch. CHECK STOP LIGHT SWITCH AND BRAKE SWITCH
Ref. to EyeSight (DIAGNOSTICS)>Diagnostic Procedure with ECU Cancel Code>12 . Ref. to BRAKE>Stop Light Switch>INSTALLATION .
10 Cruise control is not released after shifting to the neutral position. (1) Perform the real-time diagnosis.
Check the input signal of cruise control system.
Real-time Diagnosis Ref. to EyeSight (DIAGNOSTICS)>Real-time Diagnosis . When abnormal, go to (2).
(2) Check the neutral position switch. CHECK NEUTRAL POSITION SWITCH. Ref. to EyeSight (DIAGNOSTICS)>Diagnostic Procedure with ECU Cancel Code>14 .
11 Acceleration or deceleration does not occur according to the preceding vehicle. The preceding vehicle is difficult to be detected. Braking force is weaker than usual.
Alarm for requiring more brake pedal force does not sound.
  1. Using CHECK LIST (ADAPTIVE CRUISE CONTROL), check the condition and respond to it.

  1. Is this applied to the condition that the use of adaptive cruise control is not desired?
  2. Is this applied to the object or condition that is hard to be recognized by the stereo camera?
  3. Is this applied to the driving condition that the preceding vehicle cannot be recognized or the vehicle on the next lane or the object on the roadside may be recognized by mistake?
  4. Is this applied to the condition that brake force may become poor?
  5. Is this applied to the condition that the alarm for requiring more brake pedal force does not sound even in a short vehicle distance?
Check list (adaptive cruise control) Ref. to EyeSight (DIAGNOSTICS)>Diagnostics with Phenomenon>DIAGNOSTIC PROCEDURE WITH PHENOMENON>CHECK LIST (ADAPTIVE CRUISE CONTROL) .
When there is a relevant item in the check list, it can be the cause of malfunction. Eliminate the cause, and check that the malfunction has been improved. If not solved, go to (2).
(2) Check the windshield glass and dashboard. Inspection of windshield glass and dashboard Ref. to EyeSight (DIAGNOSTICS)>General Description>INSPECTION>WINDSHIELD GLASS AND DASHBOARD .
When normal, go to (3).
(3) Check the front wiper. Inspection of front wiper Ref. to EyeSight (DIAGNOSTICS)>General Description>INSPECTION>FRONT WIPER . When normal, go to (4).
(4) Check the stereo camera. CHECK STEREO CAMERA. Ref. to EyeSight (DIAGNOSTICS)>General Description>INSPECTION>STEREO CAMERA .
When normal, go to (5).
(5) Bleed air from brake system. Air bleeding from brake system Ref. to BRAKE>Air Bleeding>PROCEDURE>BRAKE LINE .
Go to (6).
(6) Check the optical axis of the stereo camera. Adjust the optical axis of the stereo camera. Ref. to EyeSight>Camera Adjustment, Inspection .