DTC    P1586    Acceleration Sensor Malfunction

for Preparation Click here


DESCRIPTION

The ECM determines the vehicle inclination based on a signal from the yaw rate and acceleration sensor to perform neutral control. If a malfunction is determined in the yaw rate and acceleration sensor based on a malfunction signal from the brake actuator assembly, the ECM cancels neutral control as a fail-safe function.

HINT:
  1. The ECM receives a yaw rate and acceleration sensor signal from the brake actuator assembly via CAN communication.
    If a CAN communication DTC is output, perform troubleshooting for that DTC first.


DTC No.
DTC Detection Condition
  1. Diagnosis Condition
  2. Malfunction Status
  3. Malfunction Time
  4. Other
Trouble Area
P1586
  1. Ignition switch ON
  2. With the vehicle speed 30 km/h (18 mph) or more, the difference between longitudinal G calculated based on the G sensor value and longitudinal G calculated based on the vehicle speed exceeds 0.35 G for 60 seconds or more.
  3. Condition 2 is determined for 3.0 seconds or more.
  4. 1-trip detection logic
  1. Yaw rate and acceleration sensor
  2. Brake actuator assembly
    (Skid control ECU)
  3. CAN communication system
  1. Ignition switch ON
  2. The yaw rate and acceleration sensor signal does not change 16 times or more while the vehicle speed decreases from 30 km/h (18 mph ) to 0 km/h.
  3. Condition 2 is determined for 3.0 seconds or more.
  4. 1-trip detection logic

WIRING DIAGRAM


C194819E02


INSPECTION PROCEDURE

1.CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM)

  1. Check for DTCs of the CAN communication system (Click here).
    Result 
    Result
    		Proceed to
    DTCs are not output
    		A
    DTCs are output
    		B



B
GO TO CAN COMMUNICATION SYSTEM (Click here)
A


2.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P1586)

  1. Clear the DTCs (Click here).

  1. Perform a road test where the vehicle is driven at 30 km/ h (18 mph) or more, the brakes are applied at least 16 times and the vehicle is finally stopped.

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC / Current or Pending.

  1. Read the DTCs using the tester.
    Result 
    Result
    		Proceed to
    Only P1586 is output
    		A
    P1586 and other DTCs are output
    		B

    HINT:
    If any other codes besides DTC P1586 are output, perform troubleshooting for those DTCs first.



B
GO TO DTC CHART (Click here)
A


3.READ VALUE USING INTELLIGENT TESTER

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List.

  1. In accordance with the display on the tester, read the Data List.

    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    G sensor
    		Converted output voltage of yaw rate and acceleration sensor/
    min.: 0 V
    max.: 5 V
    		Displays converted voltage of yaw rate and acceleration sensor
    1. Vehicle on level ground: 2.31 V to 2.69 V
    2. Decelerating: 1.88 V to (2.5) V
    3. Accelerating: (2.5) V to 3.11 V
    4. G sensor malfunction: set to 1.87 V
    5. Communication malfunction: set to 1.87 V
    		-
    Result 
    Result
    		Proceed to
    Data display is not within Normal Condition range
    		A
    Data display is within Normal Condition range
    		B



B
REPLACE BRAKE ACTUATOR ASSEMBLY (Click here)
A


4.REPLACE YAW RATE AND ACCELERATION SENSOR

  1. Replace yaw rate and acceleration sensor (Click here).


NEXT


5.PERFORM INITIALIZATION

NOTICE:
  1. Performing reset memory/initialization will clear the learned values of both the yaw rate and acceleration sensor (deceleration sensor 0 point calibration) and the CVT oil pressure (CVT oil pressure calibration). Make sure to perform reset memory, yaw rate and acceleration sensor 0 point calibration, and CVT oil pressure calibration when replacing any of the parts shown in the following table:
    Replaced Part
    1. Continuously variable transaxle assembly
    2. ECM
    3. Oil pressure sensor
    4. Yaw rate and acceleration sensor
  2. After reset memory, always perform yaw rate and acceleration sensor (deceleration sensor 0 point) calibration first, and then the CVT oil pressure calibration.
  3. Always perform the 0 point calibration with the vehicle on level ground.
  4. Do not shake or vibrate the vehicle during the 0 point calibration.

  1. Using the intelligent tester, perform the reset memory, deceleration sensor 0 point calibration and CVT oil pressure calibration (Click here).

  1. Check for DTCs again (Click here).


NEXT

END